Chevy Silverado Problems

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Comments

  • obyoneobyone Member Posts: 7,841
    I wouldn't spend any money on anything at this point. Have you had the dealer tech or manager verify your vibration? Once it's documented that it does exist, they have an obligation to resolve the issue. Does your dealer have an EVA II? This is a tool to help them to pinpoint the cause of the vibration, If they don't and don't want to buy one, call GM customer assistance they will convince the dealer that they should have one to assist in vibration analysis.
  • jaguar0027jaguar0027 Member Posts: 387
    Im taking the truck in next week. Lets see what happens. This is the 2nd to 3rd time now...
  • highcountyhighcounty Member Posts: 10
    Both my auto 99' pickup and 98' Tahoe feal like the rear end is slipping from a stop light start.
    The brakes have been checked etc. The 99' also clunks on the down ship to a stop . Any ideas?
    Both have about 40,000 miles.
  • tonyytonyy Member Posts: 26
    I bet it's the tires. Ask your dealer if they have a set of tires on rims you could trial to eliminate this variable. I had a similar problem with a new set of tires, after several balance jobs and replacing one of tires they told me I had a bent rim. I finally replaced all 4 tires and the vibration is completely gone. No new rim or alignment.
  • obyoneobyone Member Posts: 7,841
    If I remember correctly, you have the Pirelli Scorpion A/T on you truck now? That's a far cry from the Firestone stockers. Wouldn't think that Pirelli made crappy tires.
  • jaguar0027jaguar0027 Member Posts: 387
    have Pirelli Scorpion A/T's.. However.. I was told by the guys at the tire place that there have been some problems due to the fact that these tires have nylon sidewalls. The weather temps can also affect smoothness vs. vibrations etc....

    That being said, I still can feel the truck vibrating even at an idle all throughout the truck. The steering wheel, floorboards, and seats as well... It's almost like flipping a quarter into one of those vibrating beds except I paid a little more than 25 cents for this truck!! LOL

    Anyhow, the truck is going into the dealer on Wednesday for the third time now. As well as rough shifting (again) and a passenger side view mirror where the defroster does not seem to work anymore.

    I really hope they fix the problems. I told them to check the tires, driveshaft, steering box, torque converter, and to use a EVA II (thanks obyone). BTW they said they did have an EVA II so I will see what happens.

    If it does happen to come from the tires (shakes at 60-70mph) I was thinking of Michelins. Any suggestions?

    I will keep you guys posted....

    Jag
  • 2502180025021800 Member Posts: 3
    I read several prior messages that indicate an on-going problem with the yokes on extended-cab, short-bed 1500s. It seems that a nickel plated yoke corrects the mild to severe lurch and clunking that occurs on take-off and just prior to full stop. I was actually thinking of buying a new truck like this and would like some feedback regarding the fix and if new models still have this problem. Thanks.
  • gator36gator36 Member Posts: 294
    And the problem has not resurfaced, But we will see.

    The yoke was put on the one piece drive shaft. There is a TSB to replace the
    two piece driveshafts with the one piece for a similar problem. The two piece ones (I think)
    are on the 2wd models.

    Walter (Gator36)
  • chevy4mechevy4me Member Posts: 203
    I decided to try the carb cleaner myself rather than let the dealer tell me that the TSB does not apply to my 99 like the first time it went in for this. Well it worked, and was easier than I thought. A screwdriver to loosen the hose clamps on the plastic thing that connects the air box and the throttle body is all that is needed. It was sticking as I turned the butterfly by hand ruling out the cable as a potential binding point. I sprayed the carbon visible and where the shaft passes through the body. After wiping excess with a rag I sprayed some silicone in the area . Took about 15 min. and no sticking! Time will tell
  • teptep Member Posts: 10
    I remember reading somewhere never to use silicone spray near or (especially) in the intake because it can cause irrepairable damage to sensors in the emissions control system.

    I don't know for a fact that this is true. Maybe someone who knows more about it can fill us all in.
  • chevy4mechevy4me Member Posts: 203
    I never heard or read that but the minimal amount I used was no where near any sensors.It's not like I hosed it down with the engine running .
  • teptep Member Posts: 10
    Here's more on the potential silicone problem:


    http://popularmechanics.com/automotive/sub_care_clinic/1998/7/auto_clinic_9807/

  • tomh12tomh12 Member Posts: 240
    Man, won't that roast your chestnuts! .02 worth of silicone ruins an O2 sensor.
    Thanks for the heads-up for the rest of us.
    Tom
  • psp1996psp1996 Member Posts: 18
    My 2001 forest green silverado has the cheapest paint job i've ever seen. I don't think there's even a coat of paint on it--more like just a dusting. Just the other day i'm talking with a buddy and a tumble weed bush barely glance off the side of my truck; i look down at it and say holy $*#%!!! i see about 8 hair line scratches about 6 inches long--all the way down to the grey primer color. Yeah, i know it a truck, but i think GM forgot to "paint" my truck. Does anyone know if there been a recall regarding this issue?

    Thanks
  • everharteverhart Member Posts: 59
    I have a 2001 Forest Green 2500HD ext.cab 4x4 & the paint & paint job is perfect ( for a factory paint job). Sounds like they went a little thin on the paint on your truck.
  • mledtjemledtje Member Posts: 1,123
    Are you sure the scratches went through the paint? When we went through some brush in Death Valley, we got some scratches that looked real bad - my wife nearly went hysterical! But, they were just surface scratches that looked like gray primer. A little wax and you couldn't even tell where the used to be.

    Mike L
  • obyoneobyone Member Posts: 7,841
    when I asked the service advisor if that was primer showing through the paint, he didn't answer, just wrote on the service order, thin paint, need to repaint sides.
  • punjabpunjab Member Posts: 102
    I'm going through the same thing with black paint...scratches easily and can see the primer right through it. They say they will repaint the affected areas, I just need to decide on which dealer to have do it...
  • highcountyhighcounty Member Posts: 10
    So many yokes. Which one works to correct the clank noise when down shifting or putting in gear from park? Any ideas on replacement cost, my 99' is out of warranty. Nickel plated? sounds fancy, and expensive. Thanks.
  • everharteverhart Member Posts: 59
    Try having the shaft splines greased. & check for a bad u-joint.
  • bassamaticbassamatic Member Posts: 79
    Been awhile since my last post but have enjoyed reading in here occassionally.

    New problem with my 2000 Silverado, Z71, 5.3, 1500, Ext. For the last several weeks I have been getting a god awful smell from the exhaust...smells like burning trash. Occassionally some heavy smoke as well, but this is intermittent. My first thought was a bad catalytic converter and took it into the dealer today. They have had the rig all day and cannot find out what is causing this problem. They said the catalytic converter tests OK. They want to run more tests on it but I am losing confidence a little. The truck is still under full warranty so that end is not a problem.

    Anyone have any knowledge or similar experiences with this kind of thing? Thanks!

    Clay
  • rayt2rayt2 Member Posts: 1,208
    Always nice to see the GM boys throwing more tests at their mechanics.......Clay let us know what they find, it's got to be a dilly! No not the DQ Dilly Bar! LOL

    Also visit this site if you have not, good info on it. http://www.gmpistonslap.cjb.net

    Ray T.
  • duckman1duckman1 Member Posts: 4
    My buddy's 2002 Sierra Crewcab HD 6000 V8 (6l/364)RPM's at 2600+ when crusing at 75 MPH.

    He thinks this is too high - and I admit the engine sounds like it could blow at any moment.

    GMC dealer tested and said that it was just fine. They said 2600+ was perfect.

    Can anyone verify where it should RPM at this speed?

    Thanks,

    Matt Herreid
    matth@cgpmail.com
  • jaguar0027jaguar0027 Member Posts: 387
    Just picked up my truck from the dealer. It was there for three days...

    This is what I requested.

    Fix the vibration\shimmies in the steering wheel and truck.
    Fix the clunk in the steering wheel.
    Engine consuming too much oil.
    Right side view mirror. Defroster not working.
    Rough shift between first and second. Clunk when putting into reverse and downshifting from second to first.
    AC blows warm air when driving for awhile or at low speeds.

    Now I know that there ARE TSB's for most of these and I told them so which was a good thing. This is what they did...

    Fixed clunk in steering wheel per TSB Replacement.. although they service manager said it was just lubricant that is used.
    Rough shifts... Flashed with newest calibration program.

    For the clunk in the shifting and going into reverse, they ordered me a new nickel plated slip yoke as per TSB. Although they gave no ETA and said they are hard to get hold of. (Not fixed at time of truck pickup)

    Ordered a new side view mirror (Not fixed at time of truck pickup)

    AC.. just added more freon.. well I know its not freon anymore but I cant remember the name of the stuff... LOL

    Gas pedal sticking... hesitation.. replaced with new throttle body to correct binding plates.

    Excessive oil use replaced with new PCV valve per my request and TSB for it

    Oh also lubed passenger door. Its squeaked since they replaced with new door checks last month.

    AS FAR AS THE SHIMMIES AND VIBRATIONS. They claim its the tires\wheels supposedly as per the EVA II which I asked to be used per your request. He also mentioned that since I DID NOT have the stock Firestones but the Pirelli Scorpion AT's he would do nothing. He also noted the tires were cupped/chopped. I told him these tires were better than the stock POS Fstones. He told me to go back to the place where I got them and complain which I said was BS.

    Or... if I put the Firestones back on.. he said "then its my problem" I said I will see you soon since I have to go back for the mirror and the slip yoke.

    Now... what should I do??? Put the Firestones back on.. which I dont really want to do because the truck still did it then.. or.... put them back on and let him see what BS line(s) he feeds me then.. Or do I call GM Customer Assistance and tell them its BS and that I should NOT have to take these tires off for him to fix the problem. I know he is just using it as an easy way out...

    Obyone.. your thoughts??? Or anyone else.. feel free to add..

    Thanks.
  • everharteverhart Member Posts: 59
    Sounds like BS but I'd make them first check why the tires are cupped/chopped as in a front end alignment. Cupped/chopped tires will make it shimmie & vibrate. Gee checking it would have taken them 1/2 hr to say for sure what the problem was.
  • y2kgmcy2kgmc Member Posts: 23
    I have a 2001 2500HD 6.0 4.10 rear and my RPM's are aproximately the same ...these trucks have a 4.10 rear gearing and the 480LE transmission which has a .75 overdrive as opposed to the 460LE which has a .70 overdrive....so I wouldn't worry about 2600 rpms....@ 75mph.....do you have the std. 245/85/16 tires? I say don't worry bout it these engines should rev to 4500 rpms without a problem.....Ed
  • mledtjemledtje Member Posts: 1,123
    My 2500 has a 3.73 final drive. I run 33mph/1000rpm; or 2275rpm@75. If you have a 4.10 final drive, then that would make it 2500rpm@75. Close enough that the tolerance of the tach and speedo would more than cover the difference.

    Mike L
  • xyz71xyz71 Member Posts: 179
    At 75 MPH the 2500 HD should be running 2,594 RPM

    The math;

    ((245*.75*2/25.4)+ 16)*22/7/12= 7.98 feet per tire revolution.

    at 75 MPH you are going 75*5,280/60 =6,600 feet per minute

    6,600 feet per minute / 7.98 = 827 tire revolutions per minute

    with a 4.1 rear end and .75 final drive ratio

    827 * 4.1 *.75 =2,543 RPM - because yout tire is not 100% round take this number * 102%

    2,543 * 1.02 = 2,594

    If you don't like this RPM at 75 - put on bigger tires!!
  • hknoepflehknoepfle Member Posts: 45
    I have the same PU, 2wd,2000,6.0,4:10rear and I tack at about 2500-2600. My question is - what size tires can I go to if I wanted to go bigger??
  • whatsachevywhatsachevy Member Posts: 136
    I have an '01 Chevy 2500HD 4X4 EC 6.0/4.10 - with the original stock 245/75/16 tires, rpm's were approximately: 2,000 @ 60 mph, 2,500 @ 75 mph, 3,000 @ 90 mph. High rpm's are due to the 4.10 gear. I replaced the original tires with 285/75/16's. RPM's are now approximately: 1,800 @ 60 mph, 2,250 @ 75 mph, 2,700 @ 90 mph. Putting on the 285/75/16 tires has about the same effect as having a 3.73 gear with the original 245/75/16's.
  • bassamaticbassamatic Member Posts: 79
    Not really. Got my truck back and they claim after dismantling the exhaust, that the only explanation is that someone sprayed or threw somthing into the tailpipe. They couldn't see around the bend before the 55 gallon drum, but claim that the problem would go away if I replaced the tailpipe.

    Sounds pretty far fetched as my truck is always garaged, however, I guess anything is possible. I had been thinking of running a cat back dual exhaust system anyways, so I might go ahead and just do that on the assumption that that will cure the problem.

    clay
  • gmserviceguy1gmserviceguy1 Member Posts: 4
    highcountry - in most cases lubing the yoke shaft will eliminate the noise you described
    if not, buy a new rear yoke shaft and make sure it is lubed while being installed
  • easymoeasymo Member Posts: 2
    I have a 99 z71 ec 1500 4.8 with three problems. First, in heavy rain the floorboard carpet is soaked but I can't identify where it is coming from. No indication of any water running down from any where at all. Second, the truck has a loud buzzing noise at idle. It seems to be coming from the catalytic converter but not sure. Third, the gas pedal sticks a lot! Anyone else experienced these problems?
  • stef7stef7 Member Posts: 22
    I have a 99 1500 4.8 and I also had these problems. First with the water entering in the heather fan and then on the floor. I tried really hard to find the source of the leak which I thought was coming from the outside air inlet of the heating system, but never did found the problem. It clogged itself with dirt and with time I guess. About the sticking gas pedal that so many of us have, try having it fixed under warranty, they may replace the throttle body assembly. Else, you could try to clean the throttle plate and the throttle body with carb cleaner. If that doesn’t solve the problem, turn your idle speed screw clockwise about 1/4 of a turn, barely enough to free the sticking plate. That's what I did and it did not affect any systems. Good luck!

    Stef
  • hknoepflehknoepfle Member Posts: 45
    Where can a person find a complete tsb on a pu without paying for it??
  • rayt2rayt2 Member Posts: 1,208
    You can get the shortened version from NHTSA site. Geocities used to post for free but corporate GM found out and shut them down, now the only chance is to purchase from All Data ($39.95 a year, I think it is)for your particular vehicle or pray to Obyone (I thinks he has them all) LOL

    Ray T.
  • rayt2rayt2 Member Posts: 1,208
    I went to Alldata site, it's $24.95 a year for subscription for particular model year vehicle & $14.95 a year renewal. Here's the link, http://www.alldata.com/

    Ray T.
  • psp1996psp1996 Member Posts: 18
    I took mledtje's suggestion and waxed the affected area where i received the hair line scratches. It definitely helped(made them less noticable) but the scratches are still there. Looks like i got short changed on my paint. Overall though, i'm happy with my Silverado's performance. When i take my truck in for an oil change, i'll see if the dealership will do anything about the paint(doubtful--but never hurts to ask) thanks to all who chimed in on this issue.
  • ryanbabryanbab Member Posts: 7,240
    what kinda wax did you use? Just curious

    I have used Zaino Z5 on some pretty bad scratches and it took em right out
  • psp1996psp1996 Member Posts: 18
    that exactly what i used, Zaino z5, like i said before, it helped--but if you rub your finger over it, you can still feel the scratches and if look closely, you can still see it. Oh well it's a truck. Thanks anyway for the suggestion.
  • ryanbabryanbab Member Posts: 7,240
    about a month ago my dad hit my truck (whole different story). Got it back from the bodyshop and they put a 2.5 foot long scratch in the ext cab door are rear pillar. It was faily deep and the zaino wouldnt take it out. The bodyshop guy spent 45 min with a buffer and 2 3m products (dont know exactly what) and it removed the scratch totally

    Might wanna look into the 3m products
  • mdub16mdub16 Member Posts: 8
    Do fuel injector cleaners really work?
  • tex6tex6 Member Posts: 96
    What is a good grease gun to do your own lube jobs?

    Also, I noticed Mobil 1 15W-50W synthetic on the shelf. Seems like this would be the ideal oil for hot weather. Comments? Thanks!
  • obyoneobyone Member Posts: 7,841
    Look for a grease gun that will take a full sized cartridge, have a trigger handle (leaving other hand free), and hose long enough to reach the most difficult zerk.

    GM recommends 5W-30 or 10W-30. I would use the 10W-30 in hot weather.
  • tex6tex6 Member Posts: 96
    nm
  • hknoepflehknoepfle Member Posts: 45
    The dealer did a R&R on my power steering box and my vibrations are all but gone. They told me that the 2000 had an overly sensitive steering box. I think replacing my firestones would really smooth out mu PU. I wonder how big I can go - tire size - any suggestions?
  • jaguar0027jaguar0027 Member Posts: 387
    So your dealer removed and replaced the steering box and no more vibrations? Hmmm interesting but you seem to have vibrations only at 40-45mph?

    I am experiencing vibrations but at ALL speeds. Did yours feel like you where feeling road vibrations being picked up from the road but felt from your steering wheel? I know it sounds crazy but that is the only way that I can explain it. I would be interested to hear your comments.

    As far as tires Im not sure how big you can go without any rubbing going on. I believe that Ryan and some of the others have when from 265's to 285's so maybe those guys can tell ya. I have the stock size that came with my truck 265's and there is plenty o'room.

    I am getting new Michelin LTX M\S put on my truck this week most likely. I will post back and let you know how they are.. But according to www.tirerack.com and Obyone they are GREAT!
  • gtparkgtpark Member Posts: 1
    jaguar,

    I took the Firestones off at 500 miles and put on the Sears version of the Michelin LTX M\S, in load range C. The truck now has 61 K on it and these tires still have about 10 K miles left. Seem to very good in all conditions. They have worn very evenly with just rotating every 5-8K, never had them aligned.
    I think you will be very happy with them; do wish they made 285s.
    Greg
  • minikinminikin Member Posts: 389
    285x16 is the largest that will fit for sure; stock suspension and wheels. Be aware tho that GM can't reprogram for that size.
    -- Don
  • bigblackmotorbigblackmotor Member Posts: 11
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