According to Quad, Meredith is of the male gender. BTW, I didn't use the "a" word in my post and yet it got deleted. Just to make sure that I'm not off topic.
Test drive with service shop foreman scheduled for today. New vibrations have surfaced. I believe when they changed my rear leafs, changed pinion angle as truck rear sits about 1 1/2" higher than before. Vibes start to be noticeable at 35 - 65. Just a steady vibration all the way through. It's kinda like getting a free massage...don't think the truck likes it though.
Rest assured the vibration is going to shake or prematurely wear something eventually if they don't resolve it. What did they say about your friends statement about setting pinion angle by measuring difference between full rated load & empty ride height?????
On the deleted post, I had used the "a" word after "pain in" describing the job of changing the carrier bearing/universals. Your deletion must have been complimentary. LOL
From what I have seen they are NOT consistent with how they govern themselves and this forum. But they would get along well with the mayor of NY City, he rules by his "judgement" also, end result for him is he will loose the election for state senator because of it and President Clintons wife Hillary will win. Now back to topic.....
Hope you get this problem resolved soon it sounds like you have been dealing with it for toooooo long.
I find the vibrations to be amusing. Got to know the General Manager, Service Manager, Shop Foreman, and all the service writers on a first name basis. At least they know that the problem exists. What's amusing is that as one problem (leaf springs) is solved, it causes another one (driveshaft/pinion angle). At least the tire problem has been solved. I don't think the quarter windows that they have replaced yesterday are the right ones as they look and act like my old ones. Back to the dealer today for test drive. I sure hope that I don't have to go thru buyback...too many mods on the truck.
I stopped by my service dept. to get more on what's happening with parts ordered and whats with the "unable to duplicate" nonsense all over my paperwork. He claimed basically that if corporate engineers don't acknowledge any problem, then it isn't their place to. WHAT A CROCK! I focused mostly on the launch shutter, high speed wobbles, and idle shake. He claimed that they all do that. Of course I told him " That don't make it right! " My questions were leaning towards that of the procedures the tech goes through. Wondering why they aren't looking into other possibilities such as just a vacuum gauge to see if there is anything in there maybe causing a rough idle, or if they have put a string line to the drive shaft. He told me the tech does not get paid to perform these kind of procedures. There's a SNAFU. Well now it seems I will have to take my service to another (further) dealership. I tried to maintain, but I guess it got a little heated before I finally walked out. Oh well, I get a feeling any other service dept. would be a much greater help.
2 Pc. Drive Shaft... I looked down my drive line, I can't believe that it is supposed to be that crooked. I know being a 2 Pc. it ,CAN absorb a change in angles, but will it perform smoothly. I put a string line down it, side to side about 1 1/2" here and there. My '71 Chevy Pickup with a 2 Pc. is a straight line. Imagine that. And what's with the "Made in Mexico" printed on my rear leafs? HA HA that's not funny...
Anyone else notice if their 2 pc. shaft doesn't sit straight or have a reason why they don't.
I think you are right about not having a qualified dealer to fix things. I think one reason the 71 drive shaft is less crooked is because the old truck sits lower.
But one fact of life for u-joints....unless both halves of the joint rotate on the same axis, the velocity of the output half superimposes a sine wave to the velocity of the input half. The greater the angle, the more discontinuous the velocity of the output half. That sort of vibration is inherent.
Thanx quadrunner500. I am still trying to understand all this. That makes perfect sense, but what the trig is a sine wave? It can't be healthy for a tranny. I think it means that my truck has serious trouble. The vertical axis I can understand changing while under load or acceleration. But my '99's lateral axis changes at every point. The shaft out of the tranny heads right (appx. 3/4"), until the carrier bearing, then off to the left (appx. 1"), reaching the rear end. Then, add a vertical change while under load.... I plan on having my truck hoisted, so I can get the entire drive line strung, and get some pics.
It just means the output half experiences an acceleration, and then a deceleration with every 90 degrees of rotation......WHEN it's not plumb. When lined up straight, no sine wave. The more angle, the greater the amplitude of the wave. The frequency is 4X the the drive shaft rpm * 60. The unit of expression is usually cycles per second, or hertz. The amplitude is usually expressed in inches per second. Amplitude describes how severe the vibration is. Frequency describes the wave length.
Has anyone with or without a launch shutter, sighted up their 2 pc. drive shaft from under the rear bumper? I am wondering if there are any straight dual shaft set ups out there. Mine is visually obvious. I do have a serious launch shutter.
I am very happy with my truck. I have had it for almost a month now. There has been no vibrations, rattles, shakes or any other so called (imaginary) problems!
I have a 2000 Silverado 1500 extended cab 4WD (4dr) Z71 pickup. I replaced the factory shocks (46mm Tenneco Shocks that come with the Z71 package) with a set of Edelbrock IAS shocks. I think that these shocks should be included with the Z71 package. Much softer ride yet great handling. Well worth the money.
I have the P265 WOL Firestone tires that I keep at 40 psi. It has the 3.73 locking rear axle.
My question is does anyone with a 4WD extended cab have these problems?????? rcoos
p.s. Meredith, will you allow this post or are you going to do your little totalitarian censorship again???
isn't it your second post on NOT having vibrations? Hmmm...What other mods...maybe we can add enough mods to get your truck to vibrate. Let's see maybe a new Kenwood or Alpine deck with about 4 MTX Thunder 500D and 4 MTX Thunder 8000 15" subs...a couple of Boston Acoustic 4x6 to replace stock POS door speakers...May as well replace the front separates while were at it..and install extra tweeters up high above the visors. Yep..think this will definitely cause some major vibrations...
jed1894
How did the drive shaft sit prior to dealer shimming it or...what was the net result in relation to the 20- 25 degrees that you have now? How did he determining how much to shim it?
Maybe I am not explaining this right... Does your 2 pc. shaft appear straight and not shift from SIDE to SIDE at all? Mine while stationary is obviously crooked from side to side, as well as the vertical angle...
Obyone: I don't know how it looked prior to them shimming it, however, it now has two shimms on each side where it bolts to frame and the connection point. The service manager did the work himself based on tech. assistance advice. So if I had to guess, by looking at the two shimms, I'd say the difference was about 1/4 inch difference in the angle.
Krc32: I think I understand you now. I thought you were saying that the vertical angle was wrong....I understand now. I haven't checked the "side to side" angle yet, but I will when changing oil next time. Check with a string, right?
Anyway, now that I'm on the right page, anyone know what the proper vertical angle should be?
Has anyone heard of any vibrations in the old body style 2000 3/4 ton 4x4 Chevy LB reg cab PU trucks that are out there. Not sure I trust the new motor on the 2000 trucks to many changes
Don't be leary of the new Vortec V-8's they are tried and proven to be much better then the old models. Stronger, more torque/horsepower & lighter in weight because of the use of aluminum. The 5.3 is the old 327 resurrected from the dead & I have it in my 2000 Silverado 3/4 ton ext. cab. short box & love it. As for vibrations in the older model trucks I don't believe there were any, the new frame style/wheels/driveshaft angle seems to be the culprits from what I have understood from this forum, I do not have any problems to date w/my truck & hope I never do.
I was wondering since many that post to this topic may have been without a truck for several days at a time if the dealer has offered a loaner or supplied a rent a car? If I'm not mistaken... a vehicle that needs to be left overnight for warranty work...comes under a GM program that allows a $30 a day allowance for a rent a car. My dealer did not offer it until I requested it under the warranty provisions. I guess he was trying to keep his warranty costs down. Anyone else that has not been offered the rent a car or loaner?
My driveshafts do not line up laterally .Its not by a large amount but why would it be set up this way ? could there be enough torque on the leaf springs to twist some lateral motion? My 95 had the 2piece and it was dead straight. I do have the launch shudder .The shims,new leafs and shackles only gave some improvement and that was mostly when the springs were fresh ( I've had 2 sets). After 14 months of it I've gotten used to it. My more annoying problem is the transmission trying to start in second gear from stops .It happens more frequently now about twice a week. Dealer cannot duplicate and no trouble codes show up . I had hope for the fix that was coming in March but.....
Sorry to get off topic a little. I have a 99 Z71 and I was wondering if the front drive shaft to the front diff should turn when in 2hi? I was told that the hubs should be free wheeling and the transfer case should not be engaged? thanks marc
Fair Price? Come on now do your homework look up the pricing in Edmunds, www.autosite.com or www.kelleybluebook.com The answer is there, we can't tell you any more than those sites can.
I guess I am one of the few lucky ones my 2000 silerado x-cab 1500 has not one of those problems. I have 8800 miles on it, I have had it six mos. I talked to a guy today with a 1999 that has had all those problems windows/vibrations. He had his tires rebalanced, same problem, the dealer told him he had some kind of design flaw in front suspension (to make it ride better). He gave me this adress. Good luck everybody happy22
What is the manufactured date of your truck? Mine is 4/99 and I was told that my leafs, shackles, and angles were the new ones, but I don't have much faith in their truth anymore. I hope your tranny is next to be swapped. Somewhere in these conferences I read one that had only his tranny replaced, shutter ended. I tend to be leaning towards that being the heart of the shutter. Still feels almost like the torque converter. Though that lateral pitch in the driveshaft does seem ridiculous. Currently driving a Ford ( Rental ) now my third loaner. When they replace the motor, tranny, driveshaft and complete rear end, I will believe that they have done all they can.
When I go in I usually put together quite a few items for them to do. USUALLY the same as the last time!! I make sure they have a truck reserved before I drop off my truck. First time the rental co. paid the upgrade(Dodge X-Cab), when I questioned why I was supposed to, instead of the dealer. The 2nd time I told my advisor I didn't want the same trouble again getting a truck, so he covered it (Chevy Long Bed ). The 3rd time my NEW advisor, said (usually base car only )so he had to clear it through a rep first, approved in 24 hours, before drop off. Now in a Ford X-Cab~ The Chevy beats them all hands down in style and comfort. The ride quality...well...I am still waiting. Dealers WILL pay the upgrade..
In the many times my truck has been in the shop I had rentals of both Dodge and Ford extended cabs .Didnt like at all the interior layout on the Ford low on power as well. The Dodge was better on power with the 5.9 but the steering feel I didn't like. I've gotten to like the rack and pinion on mine. I would still prefer mine despite the launch shudder problem. I am thinking of upgrading the shocks to edelbrock it may help with the shudder.
After the flash update, driveline growl at 35 -45 got worse. How is that possible? Smooths out till 62 then the washing machine starts. Not real bad but the laundry could be balanced better. After changing rear leafs launch shudder just about gone. Tried with 3,4,500#'s in back. No shudder just growl. Go figure. This time I had used a more scientific weight system...elevator counterweights.
Picked up my 1500 2wd 4 door extended cab manufactured on 3-27-00 today. Very tight, no vibration at all. Has the machined aluminum wheels with 235 Goodyear ST tires. My only complaint is that this truck comes with the worst engineered set of floor mats every made. I will continue to report as the mileage rolls up. So far all the hype about vibration is like Chichen Little saying, "The Sky is falling".
GM seems to have made improvements since '99 and earlier '00 models. As the miles keep ticking, your odds of not having vibrations increase. However, this is not to say you won't have them. I would say that 7-8000 miles is a safe number to be clear of the woods. Oh yeah, better check the latches on your back windows..still having defective ones coming out of factory. Hope you have a vibrationless weekend!!
Glad you truck is solid but the statement about Chicken Little is unfair. There are still folks out there that do have vibrations that haven't been taken care of. It maybe a small percentage but if you happen to be one it is a big deal.
took a look from behind rear bumper today. The shafts line up just about perfect...looked at it from little right, left, and directly behind. '00 Silverado LS 1500. Had launch shudder with load until replaced rear springs.
I got the leaf springs replaced about 2 weeks ago. Told dealer about bottoming out over speed bumps. Their observation was sagging springs. I had asked about part no. but service writer told me he didn't have one. On the service order only has order replacement spring. Going to dealer Monday or Tuesday...I'll see if I can get a part no. cause I'm kind of interested too. Truck's rear rides 1 1/2" higher than before. So much for a level ride. Be interesting to see if it they are Z71 or updated springs.
I agree with lincoln5.....glad you truck is running good with no vibrations.....however, if it starts, you will regret the "chicken little" comment. My truck started out fine also, but after 700 miles it started.
When you trade a perfectly good truck for a 26K vibrating truck, it's not a small deal.
I don't know how much, if any, this will help, but you might want to look at topic 1738, post 576. I would have posted to this topic rather than 1738, but, at the time, I was more concerned about another problem with my 2000 Silverado.
I have the Michelin LTX M/S installed on my truck. Replaced the Generals that I had...still have vibrations 62+ mph. Rebalanced Michelin tires three times at three different locations. Still vibrating....
Sorry that the tire change did not solve your problem. I know, from what I have heard and read, that this is a serious problem. (Much more serious, of course, if you own one.) I assume you are also aware of some of the attempts at fixing the problem (e.g. springs, shocks, wheels, hubs, drive shafts, etc.). The dealer technician who works on my truck said that a GM rep. recently discussed the possibility of replacing the frame on a truck that the dealer had sold. Perhaps they can just give us the parts necessary to assemble the truck, and we can start from scratch. I have read at this web site that there have been some buy-backs as a direct result of the vibration issue.
I really did not think that my tire suggestion would solve some of the obviously serious vibration problems, but it was worth a try.
Talked to the dealer and customer service again today. The alleged fix Chevy was supposed to come up with mid to end of March has not come out yet. Is anyone surpised at that fact? I think not.
just got off the phone with my dealer's service manager. I had mentioned to him on replacing the frame. He thought I was nuts. I admit I had a laugh out of it. It seems that every time we finally solve one problem it creates another one or two problems. I had a vibration at 50-60 that is now history, but it created the vibrations at 62-70 mph. Also when they updated my PCM for the driveline growl, it actually got worse. Funny thing dealer insists that they updated the PCM, but it doesn't show on my service work order. Hmm...sounds suspicious..especially when I have to ask three to four times to get my copy of their work orders which normally is given to you at the time you pick up your truck.
I also took the "replace the frame" remark as not being serious, but perhaps it was. I'll be talking to the technician today, and you will be the first to know if it was a joke.
I have to confess that I was amazed that the tires fixed my vibration problem because I had never had a vehicle even come close to shaking as much as the 2000 Silverado. Another part of the fix is the installer, who is a genius with tires and wheels. Incidentally, he balances the wheels and tires off the truck which, as I am sure you know, is not always the preferred method.
Of course, the dealer should always give you a copy of the service record. I have purchased 17 cars and trucks from the Chevrolet dealer near my home, and I have, on a few occasions, had to ask for a copy of their service record. Having asked, it was immediately forthcoming.If it had not been,I would have had to assume that they had a problem with record retrivial or that they did not do the work. I am not suggesting that your dealer did not perform the work, but I know the owner of the local dealership, and he tells me that they are under more and more pressure from GM to control warranty work (and, hence, costs). If you are working toward a possible buy-back, then the service records obviously become even more important.
It is absurd that we have to try to help GM solve some very wide spread problems, but I am convenienced that the whistling problem I had with this truck would not have been solved so easily had it not been for a web site such as this.
Has the dealer service personnel actually riden in the truck with you and acknowledged the vibration and/or aftershock problem? What I feel in my truck now is more of the aftershock. The out of round tire feel seems to have gone away after replacing one tire and indexing the remaining ones (couple of times). My dealer has the new super sensitive tire balancing machine that actually puts some down force on the tires while they balance them.
I just put a set of Edelbrock IAS shocks on my truck and it did help. They really do give you firmness while cruizing down the road and still soak up bumps like the stock "solid smooth ride" shocks. It seems like the faster you are driving the firmer they feel. Noticed a big difference when moving slowly, like over a speed bump. It has been 6-7 months since I drove a truck with the firm ride factory shocks, but from what I can remember the factory firm ride seemed stiffer. Maybe it's the Edelbrock valving working as promised. Climbing in the bed of the truck it seems much more solid now.
I too noticed a substantial difference when installing the edelbrocks. Although, it took replacing of the rear springs to get rid of the aftershocks. did yours disappear after the edelbrocks? We are doing another test drive today...the service manager and me...it appears that when changing the front insulators to urethane...a small adjustment needs to be made in the lot shaft angle or the steering road feel becomes SUPER sensitive and everything is felt up the steering shaft. I will post results after. We pretty much seem to agree that it's there...the vibrations..just both of us getting a little frustrated with GM for placing vehicles like this into service. An ultimate waste of productive time for both the dealership and the owner.
Professor2
Did you mean to say balances wheels and tires "on" the truck? One interesting thing on the tire balancing. I had the tires balanced a total of four times and only one tire/rim combo out of four balanced to "0" on the initial attempt at all four dealers. Each balancing machine showed that the previous balance was off anywhere from .25 to .5 oz. These balances were done within a week to ten days of each other. What concerns me is that one of the tires has 1.75 oz weight on the inside. Fine for Mack or Kenworth not so good for the Silverado.
I have two vibrations. One at low rpm also known as driveline growl and high end at 62-65 mph. Also newly developed jolts from steering shaft. All confirmed on test drive. They are planning to rebalance tires and check rims on front tires and check steering shaft as the harshness started after replacing spring insulators. Driveline growl...recommended correction...buy a hypertech III. Got that straight from the dealer person. Said tech II cannot correct as of now. Waiting for more updates as my truck has all of the latest. I guess real life solutions have to come from third party vendors...I was planning to buy it anyway...but not for this reason.
My aftershocks are still there after installing the edelbrocks, though they are less noticable. Very minimal in the front, mostly noticable in the rear. I also noticed some launch shudder after recently loading it with about 1400 lbs. Think I'll talk to the dealer about the rear leaf springs. By the way, when was your truck built. Mine was one of the first 2000 models built in July of 1999. Maybe this spring thing is a carry over from the 1999 model problems. Later.
I thought that my truck was built in 5/99...checked again and it actually is 7/99...built at Ft. Wayne, Indiana. I had asked him about how they go about checking on the rear springs. He said that as soon as he saw my truck, he knew that the springs were defective as the truck sat level...which it shouldn't do without a load. They also tested with three techs in the back to simulate load going over speed bumps and all four of them had verified that the truck bottomed out. Replacement springs will definitely get rid of those annoying aftershocks.
The tech also told me that he just got his '00 2500 LS and was glad he got a 2500. Had to wait 9 months for it but shares none of the 1500's problems.
I have to concur with your tech on the Y2K 2500 LS, after 2300 miles and recently with a 1500# payload for a 100 miles I have no vibrations or problems to date. So maybe all these problems are directly related to the 1500 models, I hope. BTW w/1500# payload (firewood) the truck was sitting level and I actually got to put the Tow/Haul mode to work. Makes a big difference in shift points, they are stretched out longer and it shifts quicker when it does. Probably similar to what a Hpertech 3 would do if I installed one but I believe the tow/haul feature does just what the Hypertech unit does w/changing of shift points.
Its great to see everyone continuing the posting on the vibration issue. Although some may not be aware, we are all creating a very valuable data-base by documenting our experiences with our new model Silverado's, General Motors and its authorized dealer network. I have gone to arbitration with GM before and a forum like this would have been priceless in my efforts. Although I eventually won (paint delamination) it was an arduous task to say the least. BACKGROUND: My truck is an Indiana built 5/99, Z/71, 5.3, reg cab, 3.73 posi, short-box(step-side)P265 - alloy rims. The vibration since about 500 miles was in the typical 60-65 mph range. The dealer did acknowledge it is a common problem but no suggested GM fix had yet proved effective according to the dealer. Therefore I simply had it documented on the workorder and did not want them experimenting on my 40K truck. ( I am glad I took this root,I see its still the case 8 months later). As experienced owners can attest too, every time a dealer works on a fix they inevitably create another problem.
The truck came with Firestone Wilderness AT's, P265/75R-16's. I simply didn't like the look or ride so I bought a new set of Goodyear RT/S at about 700 miles, same size and had them balanced at a local tire shop. The vibration in the truck remained the same as was the case with the Firestones, at about 60 to 65 the steering wheel rapidly shook back and forth about a 1'4 inch, it was some times triggered by a bump, sometimes it just started on its own as the mph increased.
What have we learned so far...the change in tires did not seem to change the vibration condition. The story continues...to save my precious alloy rims from our Canadian winters I bought a set of steel GM rims and another fresh set of Goodyear tires. This time, AT/S LT265- 75R-16's. Guess what, the vibration was gone ! Well lets be really exact and say that it was 98% corrected ! Really. My conclusion, and feel free to comment, is one of several things may be happening here. First, I may have an alloy rim(s) that are not straight (remember both the new Firestones and the new Goodyears tires vibrated - despite 2 different sets of tires and two different balancing methods, ie: factory and aftermarket highend shop). Could it be two sets of bad tires from 2 different tire manufactures - highly unlikely. I believe the answer lies in the added recipocating weight and mass of the LT, read LIGHT TRUCK 8 ply tire and the heavier steel rims which have effectively nullified the vibration that was occuring. Ill keep ya posted. Although I must tell you the vibration issue is pale in comparison to the newly aquired clacking/knocking sound I am getting at the DR. side rear area of the 5.3. It happens when its hot only and is most noticable at 900 to about 1500 rpm, under load or free reving. ( I use mobil1). It used to have the cold start knock (lifter bleed down?), thats gone and replaced by the 900rpm clack, I think it may be valvetrain, I hope she goes away as I continue to put miles on her, 10K to date.
Comments
Test drive with service shop foreman scheduled for today. New vibrations have surfaced. I believe when they changed my rear leafs, changed pinion angle as truck rear sits about 1 1/2" higher than before. Vibes start to be noticeable at 35 - 65. Just a steady vibration all the way through. It's kinda like getting a free massage...don't think the truck likes it though.
On the deleted post, I had used the "a" word after "pain in" describing the job of changing the carrier bearing/universals. Your deletion must have been complimentary. LOL
From what I have seen they are NOT consistent with how they govern themselves and this forum. But they would get along well with the mayor of NY City, he rules by his "judgement" also, end result for him is he will loose the election for state senator because of it and President Clintons wife Hillary will win. Now back to topic.....
Hope you get this problem resolved soon it sounds like you have been dealing with it for toooooo long.
Ray T.
He claimed basically that if corporate engineers don't acknowledge any problem, then it isn't their place to. WHAT A CROCK! I focused mostly on the launch shutter, high speed wobbles, and idle shake. He claimed that they all do that. Of course I told him " That don't make it right! " My questions were leaning towards that of the procedures the tech goes through. Wondering why they aren't looking into other possibilities such as just a vacuum gauge to see if there is anything in there maybe causing a rough idle, or if they have put a string line to the drive shaft. He told me the tech does not get paid to perform these kind of procedures. There's a SNAFU. Well now it seems I will have to take my service to another (further) dealership. I tried to maintain, but I guess it got a little heated before I finally walked out. Oh well, I get a feeling any other service dept. would be a much greater help.
2 Pc. Drive Shaft... I looked down my drive line, I can't believe that it is supposed to be that crooked. I know being a 2 Pc. it ,CAN absorb a change in angles, but will it perform smoothly. I put a string line down it, side to side about 1 1/2" here and there. My '71 Chevy Pickup with a 2 Pc. is a straight line. Imagine that. And what's with the "Made in Mexico" printed on my rear leafs? HA HA that's not funny...
Anyone else notice if their 2 pc. shaft doesn't sit straight or have a reason why they don't.
But one fact of life for u-joints....unless both halves of the joint rotate on the same axis, the velocity of the output half superimposes a sine wave to the velocity of the input half. The greater the angle, the more discontinuous the velocity of the output half. That sort of vibration is inherent.
The vertical axis I can understand changing while under load or acceleration. But my '99's lateral axis changes at every point. The shaft out of the tranny heads right (appx. 3/4"), until the carrier bearing, then off to the left (appx. 1"), reaching the rear end. Then, add a vertical change while under load....
I plan on having my truck hoisted, so I can get the entire drive line strung, and get some pics.
I am wondering if there are any straight dual shaft set ups out there. Mine is visually obvious. I do have a serious launch shutter.
2nd question: If the 2 pc drive shaft is suppose to angled, what is the angle suppose to be? Can it be measured with handy-man tool?
My drive shaft is angled (upwards) probably 20-25 degrees at the connection point. Do you think that's normal? The dealer adjusted with shimms.
I also have launch shutter.
Thanks John
I have a 2000 Silverado 1500 extended cab 4WD (4dr) Z71 pickup. I replaced the factory shocks (46mm Tenneco Shocks that come with the Z71 package) with a set of Edelbrock IAS shocks. I think that these shocks should be included with the Z71 package. Much softer ride yet great handling. Well worth the money.
I have the P265 WOL Firestone tires that I keep at 40 psi. It has the 3.73 locking rear axle.
My question is does anyone with a 4WD extended cab have these problems??????
rcoos
p.s. Meredith, will you allow this post or are you going to do your little totalitarian censorship again???
jed1894
How did the drive shaft sit prior to dealer shimming it or...what was the net result in relation to the 20- 25 degrees that you have now? How did he determining how much to shim it?
Does your 2 pc. shaft appear straight and not shift from SIDE to SIDE at all?
Mine while stationary is obviously crooked from side to side, as well as the vertical angle...
I don't know how it looked prior to them shimming it, however, it now has two shimms on each side where it bolts to frame and the connection point. The service manager did the work himself based on tech. assistance advice. So if I had to guess, by looking at the two shimms, I'd say the difference was about 1/4 inch difference in the angle.
Krc32:
I think I understand you now. I thought you were saying that the vertical angle was wrong....I understand now. I haven't checked the "side to side" angle yet, but I will when changing oil next time. Check with a string, right?
Anyway, now that I'm on the right page, anyone know what the proper vertical angle should be?
John
The 5.3 is the old 327 resurrected from the dead & I have it in my 2000 Silverado 3/4 ton ext. cab. short box & love it.
As for vibrations in the older model trucks I don't believe there were any, the new frame style/wheels/driveshaft angle seems to be the culprits from what I have understood from this forum, I do not have any problems to date w/my truck & hope I never do.
Ray T.
Ray T.
my 2000 silerado x-cab 1500 has not one
of those problems. I have 8800 miles on
it, I have had it six mos. I talked to a
guy today with a 1999 that has had all those
problems windows/vibrations. He had his
tires rebalanced, same problem, the dealer
told him he had some kind of design flaw in
front suspension (to make it ride better).
He gave me this adress. Good luck everybody
happy22
When I go in I usually put together quite a few items for them to do. USUALLY the same as the last time!! I make sure they have a truck reserved before I drop off my truck. First time the rental co. paid the upgrade(Dodge X-Cab), when I questioned why I was supposed to, instead of the dealer. The 2nd time I told my advisor I didn't want the same trouble again getting a truck, so he covered it (Chevy Long Bed ). The 3rd time my NEW advisor, said (usually base car only )so he had to clear it through a rep first, approved in 24 hours, before drop off. Now in a Ford X-Cab~ The Chevy beats them all hands down in style and comfort. The ride quality...well...I am still waiting.
Dealers WILL pay the upgrade..
Has the machined aluminum wheels with 235 Goodyear ST tires. My only complaint is that this truck comes with the worst engineered set of floor mats every made. I will continue to report as the mileage rolls up. So far all the hype about vibration is like Chichen Little saying, "The Sky is falling".
advmason
Surfing is what it's all about with learning computers, I'm not one for reading the manuals on computers as for my trucks , that's a different story.
Ray T. :-)
When you trade a perfectly good truck for a 26K vibrating truck, it's not a small deal.
Happy trails....
I really did not think that my tire suggestion would solve some of the obviously serious vibration problems, but it was worth a try.
Good luck.
Is anyone surpised at that fact? I think not.
I have to confess that I was amazed that the tires fixed my vibration problem because I had never had a vehicle even come close to shaking as much as the 2000 Silverado. Another part of the fix is the installer, who is a genius with tires and wheels. Incidentally, he balances the wheels and tires off the truck which, as I am sure you know, is not always the preferred method.
Of course, the dealer should always give you a copy of the service record. I have purchased 17 cars and trucks from the Chevrolet dealer near my home, and I have, on a few occasions, had to ask for a copy of their service record. Having asked, it was immediately forthcoming.If it had not been,I would have had to assume that they had a problem with record retrivial or that they did not do the work. I am not suggesting that your dealer did not perform the work, but I know the owner of the local dealership, and he tells me that they are under more and more pressure from GM to control warranty work (and, hence, costs). If you are working toward a possible buy-back, then the service records obviously become even more important.
It is absurd that we have to try to help GM solve some very wide spread problems, but I am convenienced that the whistling problem I had with this truck would not have been solved so easily had it not been for a web site such as this.
More later.
I just put a set of Edelbrock IAS shocks on my truck and it did help. They really do give you firmness while cruizing down the road and still soak up bumps like the stock "solid smooth ride" shocks. It seems like the faster you are driving the firmer they feel. Noticed a big difference when moving slowly, like over a speed bump. It has been 6-7 months since I drove a truck with the firm ride factory shocks, but from what I can remember the factory firm ride seemed stiffer. Maybe it's the Edelbrock valving working as promised. Climbing in the bed of the truck it seems much more solid now.
Professor2
Did you mean to say balances wheels and tires "on" the truck? One interesting thing on the tire balancing. I had the tires balanced a total of four times and only one tire/rim combo out of four balanced to "0" on the initial attempt at all four dealers. Each balancing machine showed that the previous balance was off anywhere from .25 to .5 oz. These balances were done within a week to ten days of each other. What concerns me is that one of the tires has 1.75 oz weight on the inside. Fine for Mack or Kenworth not so good for the Silverado.
The tech also told me that he just got his '00 2500 LS and was glad he got a 2500. Had to wait 9 months for it but shares none of the 1500's problems.
BTW w/1500# payload (firewood) the truck was sitting level and I actually got to put the Tow/Haul mode to work. Makes a big difference in shift points, they are stretched out longer and it shifts quicker when it does. Probably similar to what a Hpertech 3 would do if I installed one but I believe the tow/haul feature does just what the Hypertech unit does w/changing of shift points.
Ray T.
BACKGROUND:
My truck is an Indiana built 5/99, Z/71, 5.3, reg cab, 3.73 posi, short-box(step-side)P265 - alloy rims.
The vibration since about 500 miles was in the typical 60-65 mph range. The dealer did acknowledge it is a common problem but no suggested GM fix had yet proved effective according to the dealer. Therefore I simply had it documented on the workorder and did not want them experimenting on my 40K truck. ( I am glad I took this root,I see its still the case 8 months later). As experienced owners can attest too, every time a dealer works on a fix they inevitably create another problem.
The truck came with Firestone Wilderness AT's, P265/75R-16's. I simply didn't like the look or ride so I bought a new set of Goodyear RT/S at about 700 miles, same size and had them balanced at a local tire shop. The vibration in the truck remained the same as was the case with the Firestones, at about 60 to 65 the steering wheel rapidly shook back and forth about a 1'4 inch, it was some times triggered by a bump, sometimes it just started on its own as the mph increased.
What have we learned so far...the change in tires did not seem to change the vibration condition. The story continues...to save my precious alloy rims from our Canadian winters I bought a set of steel GM rims and another fresh set of Goodyear tires. This time, AT/S LT265- 75R-16's. Guess what, the vibration was gone ! Well lets be really exact and say that it was 98% corrected ! Really.
My conclusion, and feel free to comment, is one of several things may be happening here. First, I may have an alloy rim(s) that are not straight (remember both the new Firestones and the new Goodyears tires vibrated - despite 2 different sets of tires and two different balancing methods, ie: factory and aftermarket highend shop). Could it be two sets of bad tires from 2 different tire manufactures - highly unlikely.
I believe the answer lies in the added recipocating weight and mass of the LT, read LIGHT TRUCK 8 ply tire and the heavier steel rims which have effectively nullified the vibration that was occuring. Ill keep ya posted. Although I must tell you the vibration issue is pale in comparison to the newly aquired clacking/knocking sound I am getting at the DR. side rear area of the 5.3. It happens when its hot only and is most noticable at 900 to about 1500 rpm, under load or free reving. ( I use mobil1). It used to have the cold start knock (lifter bleed down?), thats gone and replaced by the 900rpm clack, I think it may be valvetrain, I hope she goes away as I continue to put miles on her, 10K to date.