I got the engine in sept 01', had 21k on old engine. I got it because I complained about the cold start knock several times, they did the decarbon treatment which worked for about 1500 miles but the knock returned. So when I went on vacation in August I left the truck at the dealership for a week and asked that the zone rep be contacted. When I returned the dealer said a new engine right off the line was ordered. I didn't have to complain loudly at all but said my resale was compromised whether this noise was normal or not. Who would buy a truck with an engine that had the cold start knock? the service mgr said 5-10% of the engines knocked so the new engine had a 90-95% chance of being quiet. Luckily it has been quiet for the first 6k miles and the old engine knocked within 2k.
So at this point what choice do I have, I took it after a futile arguement for a 6/100 beginning after the 3/36 expired, tried to get the 5/100 to take effect after 3/36, that didn't go over either. So with 27,000 on the odometer and the truck almost 2 years old I get an extra 2 years or 54,000 miles added to my 3/36 warranty for the engine only. As I told customer rep GM sure doesn't have much faith in it's product if it can't back up the claim that the "knock" is normal and will not cause any premature wear. "Sorry sir, that's the best offer with can give you"
So that's the end of the story for now, until some auto mag, Consumer Reports or Big Brother steps in to confront GM on this "knock issue".
I have a 97 w/4.3l it knocks like a bunch of marbles when you leave a stop light its raddles ,knocks untill you get to 35 mph and you cant hear it any more only does it when its warm..I tryed premun gas no help .no eng codes set,and no timing adj for this eng pre set per the factory. only under load. no knock at idle or rev up.any ideas??? im at a loss
Is that the Basic gaurd or engine component only? If it is component only, they are handing out basic gaurd like it was candy. Remember that the GMCAC number is an Outsourced help line. These are not GM employees But paid phone operators that know squat about the vehicle you own...
It's the engine (componet) only. I really don't have any other problems or complaints that they haven't taken care of other then the "knock issue"
So much for it being normal though, they obviously know somethings wrong if their starting to give these componet warranties out like candy, anyone who complains seems to get one now. I would think there would be a break point somewhere so as to have a recall issued but who knows what that will take. I may send in a complaint to NHTSA but not sure they would be the proper people to notify on this one, anybody else have any suggestions so GM doesn't get away with this fiasco??
I recently received my latest oil sample from Blackstone Labs. Pretty much on par with the other 2 samples. 21000 miles worth of documentation on the oil analysis. Every time the copper is high and Tin is slightly over the industry average. So here I am at the dealership (wifes new car) and I see the service manager that I have a good rapport with. He asks me about my truck and how it is doing and I mention the engine knock is getting worse. (Glazed over look) I then mention that I have been sending samples out for the last 13,000 miles and every time the copper is high (2-3 times the average) He is visibly surprised and asks me to bring my truck in along with the reports. (another dealer has given me the "Standard" GM line on the knock) While it was hard to hear him over some noise, he mentioned that some of the bearings (mains) are mostly bronze. He had to run as he was being paged. I plan on bringing my truck in next week. So today I decide to get some stats from the lab that has done the analysis. I call Blackstone labs to talk with them half expecting to get next to no information. To my surprise they get the lab technician that actually did the sampling. He had a copy of my history in front of him and we had a nice long conversation about my motor and similar motors. This is a brief synopsis of what I learned. 1. If the copper is from the factory fill oil, it should have been out of the engine long before my last sampling. This is of concern. 2. Aluminum is a little high and may be of concern, still not above average.
3. The average that they list on the report is based upon 192 different engines of the same make and model that have had oil sampled. So this is a Vortec 5.3L Specific average.
4. The average is also based upon a 7,100 mile average oil life. That is the average sample has been through 7,100 miles.
5. This lab does oil samples for all makes and models of engines. They may have a person call here an there regarding an engine that has a knock. One here for a Honda, One there for a Toyota..... But there have been a few GM engine owners with complaints. Specifically he remembers at least five people in the last year or two. This is statistically important as there is a definite pattern.
Who knows what this information will do for anyone, but it just may help to get some action. We will see what the dealer has to say. I will say this I am impressed with the knowledge and customer service of Blackstone Labs and will definitely send them my business.
Got my Extended Component Warranty for the engine knock in mail yesterday from GM, 5year/100,000 mile for engine only. Guess I won't be keeping this truck for 10 years after all.
Hey.. Anyone out there with the older 5.7 liter 350 cubic engine with the same problem?? I have a 94 chev with a 350 and experience the same problem.. Knocks quite a bit when cold, not as bad when gets up to temp...
in my '94 GMC, everything was fine as far as GM was concerned and gave me a letter stating that, and if it were to become an issue, they supposedly would help me(only did it in cold weather). Once I had a remote starter installed and started the truck without being right by it, never heard the noise-maybe GM should just equip the trucks with remote start and recommend starting them from beyond 200'!!
Thats one way not to here it. I prefer to make a habit of prewarming the engine prior to going any place. The knock only lasts for a minute during intial start-up then fades away, gives me a little piece of mind knowing that at least I got the dino juice flowing and parts have expanded. It would be much nicer to have the engine without this flaw though! I have 3 more years to make up my mind whether to sell or keep for now, I did order this truck the way I wanted with intent of going 10-12 years with it though. Lifes a [non-permissible content removed], then you marry one then you die! LOL
Purchased my new 454 back in 98. Cold start knock started around 5k miles. Service tech said "no harm no foul". Around last July at about 32k miles the knock totally disappeared. Now have 35k miles and still no knock. I did nothing to it and neither did the dealer. I burn the same gas and added nothing to the oil. I only use the truck to tow my boat. Once a week I take her out for a spin to keep the juices flowing. Every time I start it I expect to hear the knock return. No knock.....it purrs like a lion.
Last July did you happen to change to a different type of motor oil or oil filter? I've been using Mobile 5W-30 conventional oil and the PF59 AC/Delco filters since my truck had 500 miles on it, and it has been knock-free since day 1. Currently have 10,565 miles on it. Not to say that my oil or filter is the fix, just making a comment about what I use.
Dealer did first 5 oil/filter changes every 3000 miles w/5w30 Dino Juice & AC PF 59 filter. My knock didn't start till around 17k miles. Now have 27000 miles and I change oil every 5k w/5w30 Dino & AC PF59 filter. I hope knock goes away only time will tell. As Ryan stated I also got the GM letter for extended engine warranty. Truck used mostly weekends for trips to Home Depot/Lowes or towing 18ft travel trailer for outings.
I've been off the board for awhile now, but decided to look in today. good to see a lot of you guys are still trading information.
don't know if its a coincidence or what, but at my last oil changed, I switched from Mobil1 to Royal Purple synthetic and my engine knock has almost totally gone away. my '00 2500 with 6.0l now has 37,000 miles - the oil change to RP was done at 34,800. The noise can still be heard on very cold mornings, but is much quieter and lasts only a few seconds, whereas before it clattered pretty good for up to a minute.
don't know if the RP oil has anything to do with it, but thought I would pass on the news. Also, have noticed a gradual, verifiable increase in MPG since the switch to RP.
Near as I can tell Blackstone lab reports usually come back showing high on copper; often/mostly for no good reason as far as I can tell. I have no idea why, but this seems to be a trend with no basis in make/model/mileage/whatever. -- Don
... at that serpentine belt. I have heard more than one of those things sound just like a flat lifter. And since the noise occurs very rhythmatic to the engine speed, it confuses lots of folks as to it's origin. Usually you will see small cracks develop in the belt at the time the noise begins.
BTW, whenever I notice a little knocking in my 2k 6.0L 2500, I just put in on the highway and blow the soot out of it for a few miles. Knock has disappeared every time. Usually shows up when I have been doing a lot of stop and go traffic driving for several days without any highway driving. All in all, really good truck.
just wanted all of you that have that dreaded tick in the 5.3 motors that after 13,000 miles of griping about this (2001 silverado 2wd x-cab) my dealer suggested to call gm's customer line this morning, and after 10 minutes i had a 72 mo. 100k warranty on the engine. the truck has 25k on it now. any comments on pursuing a possible buy back would be appreciated. the tick still exists however i like the truck.
jlflemmons............don't confuse "spark knock" w/engine knock aka piston slap. My knock I originally thought to be lifters but as time and mileage wore on it became very apparent that it was down low in the engine.
Wadeo1.........I have somewhat the same truck as you. It doesn't surprise me that with one call to GMCS you were offered the extended component warranty, the key point was that you had documented it at your dealers. GM is giving these extended warranties out like cotton candy at the fair as long as you document at dealers and pitch a fit to them about their product reliabiltiy for the long haul.
What really needs to happen is a class action against them to get the ball rolling but that takes deep pockets a good lawyer w/lots of time.
I posted this article before but go here to see the real deal on this knock issue and why it will be awhile before the design change gets to the general population of GM engines. http://www.c5registry.com./2k2z06/page5.htm
I own a 2001 Camaro SS 5.7 Liter with 7K miles. I burn a qt of Mobil 1 Synth every 1k miles. It knocks like a diesel for 15 minutes and continues (you can hear it from the rear of the car!) even when hot. GM will do nothing but offer me xtended warranties which I decline. After going thru GM-dealer hell, no tech ever drove the car. No tech ever isolated the knock. No tech ever said what the knock was except to call it a normal "noise" (per the boiler plate GM memo, for sure [now shredded]). Now they want to tear it apart (per TSB 010601023) and put a new ring pack in it. I can just see the sprinkles from the tech's donut falling into my power head while he tries to remember where the extra bolt came from. I would settle for a new engine (re-designed) but GM will not foot the bill. "We'll be there", "Like a rock (sounds like...)" "We're an American band". We paid for those advertisements.
I had an independent engine re-builder isolate the knock to only one (#8) cylinder. Could be slap or wrist pin but not normal, he said. Go to gmpistonslap (from google), join the club and get informed. We all want to believe it's normal folks but face the truth. Your grandma's car never sounded like a diesel and if it did, she'd have known it wasn't normal. My next car will be another NISSAN (Hum... can you say 350Z?). All this "buy American" business has spoiled the domestic manufacturers. We are nothing more than test pilots for them--lemmings driving lemons. Unbelievable... Never Again...
It now has 45,000 miles on it and the knocking is getting louder and lasting longer all the time. I have to wait at least 10 minutes for warm up else the knocking noise gets so loud it scares me. This one is not going to make it 100,000 miles.
it's not an issue or durability problem, maybe you should visit your dealer? Did you get the extended component warranty from GM or BS instead? I'd pitch a fit and contact Customer Service, hopefully you documented this before 3/36 warranty expired. If not get out your wallet cuz GM may show you the door.
Anyone who is having this engine KNOCK (which GM calls a "noise"), problem needs to get involved. Go to: http://www.gmpistonslap.cjb.net and obtain the form letter to send to your state's Attorney General's office. That is a must! Many other Fight-Back initiatives there including flyers. They (A.G.'s), will only act if they receive a large volume of similar complaints to their consumer affairs office. Also, go to: http://www.LS1.com and find the internet petition, now signed by hundreds of others. Most of all, do not be ashamed to tell EVERYONE you know how GM is treating you. It's not our fault. GM will soon learn that "what comes around, goes around". United We Stand.
I have a 97 GMC with the L29 454. It too developed a cold start knock at 3000 miles. First they shuffled out the TSB describing the knock as normal. As truck got older the knock got worse. At 32000 miles I finally threated to use the lemon law. They tore down the motor and found cylinders 5 & 6 overbored by .080. The way it was described to me its that the boring machine only does 4 cylinders at a time and on the same bank, so 5 & 6 use the same reamer. To the credit of the dealer and GM, I received a new motor under warranty. New one does not knock. I wonder how many blocks went out the door that day, or until they found the reamer out of spec.
thanks for posting the link.......some very interesting info. i just love bringing info like that to my dealer. you oughta see the raised eyebrows when confronted with TSB's that they think no one is aware of......LOL
Please answer: Date and location you received the new motor. Dealer's name perhaps?
Also, did you get a new, "crate" motor or a re-manufactured. Others here have been offered re-manufactured engines. Today the BBB hinted to me that I could get one for my 2001, 7K miles, 5.7 knocker/oil burner. I said no way. More problems down the road & car too new. Maybe if I was past warranty by a couple K miles. If you got a crate engine, how did you confirm it was new? How many miles do you have on the truck now?
Thanks from all of us and if you got a new one, it sounds like you got in "under the wire".
I did receive a new crate motor. I was invited in the shop not to see the problem with the old motor, when the new one arrived. They jumped through hoops to get me back on the road. There wasn't a motor available in the local area so they sent a pickup down to Twin and met another pickup from their sister dealership in SLC. They also paid OT to the primary mechanic so he could get my truck running. The dealer was Larry Miller of Caldwell, Idaho, can't say enough good things about them.
I just had a meeting with the tech rep reguarding my transmission problems. (See my posting in 2000 GMC Tranny Trouble). I also have a piston slap, started at around 10K, complained about it at 18K. I have also had a low engine oil level light come on 1500 miles after an oil change by the dealer. I also have a pre ignition pinging sound at crusing speeds when the engine is loaded just enough to maintain speed. I live in Soutern New Jersey, no hills here, I run 89 octane, but it'll ping with 94 octane Sonoco. Tech rep told me to run Moble 1 Synth for the piston slap, and that the ping was due to the computer leaning out the mix for fuel economy. Sounds like a bunch of CRAP. I am getting a new driveshaft yoke however. The tech rep did hear my CLUNK in my drive line. I went to the site that nomoregm listed and I will be contacting the AG, my US Senators and Rep, and GM Cust Serv. Any one else heard about the Moble 1 line. Dowes it help?
Don't waste your money on the Mobil 1 for the knock, contact GM Customer assistance at the 800# and file a complaint, they will probably offer the extended component warranty for the engine, insist on 5/100k warranty (they will ask how many miles you drive a year to judge what warranty they'll offer you) then follow thru with the letters to who you mentioned.
Good Luck and keep us posted as well as the piston slap web site.
I changed to mobile 1 when I bought my '01 2500HD 8.1/Allison with only 79 mi on it.The engine knock started at about 2000 mi.At first it only lasted 10-15 sec.Now with 18,800 it knocks for 50 sec or more.I've used Mobile 1 the whole time but I can't justify using it any more on an engine that I don't expect to last. kip
I had about 26K on a Z-71 5.3L - did have a small knock at start up, I switched to M-1 before a 2,700 trip to Colorado. The temp in Colorado first morning was - 10, I expected to hear a louder than normal knock, but to my surprise - no knock at all. My knock is gone - I now have a little over 30K on truck. Was it the M-1 or maybe the long hard drive - I really don't know.
I still called GM customer service and ask about an extended warranty. They called my dealer and then offered me the 5 year 100K plan. WITHOUT GETTING NASTY about it, I said that was not good enough. I only drive about 10K per year and thought a 7 year 70K plan like Dodge is offering was a more fair deal for me. She needed to check with her supervisor - would call me back. 15 minutes latter the phone rang - it was the supervisor - he knew I had purchased 3 new GM trucks in the last 4 years - he new the service records of my trucks, he offered a 6 YEAR 100K plan and said he could not go any longer. I accepted the deal and am waiting for the letter.
I've got a brand new 2002 2500HD, 6.0L, only 400 miles. No sign of engine knock at all at this point, does anyone know if changes were made with the 2002 models to fix the problem??
They only protect you from catastrophic engine failure. You live with the knocks and burning oil and eventual breakdown. I agree with others here: Fix my vehicle and then you can give me an extended warranty if you want, GM.
NWJETBOAT: What was the DATE you received your new motor. Would you be willing to post your service order(s) leading up to the replacement? You can delete your personal info. It might help some others here and at the gmpistonslap site. Thanks in advance.
MENTOR34: It's likely a "trade secret" if the piston re-design was done. To advertise it would be an admission of guilt by GM. They have already started with the Corvette which is getting new teflon coated pistons--go to: http://www.c5registry.com./2k2z06/page5.htm That technology will eventually trickle down into all engines and be called normal evolution--not a fix. [non-permissible content removed] covered.
For now it seems, if you're not getting the teflon pistons, rings, etc., you have a 1 in 3 chance (or more) of getting an oil-burning slapper like ours. Good luck to all the new buyers. Go to http://www.alldata.com/ It's a TSB site--only the titles are free. This is the TSB found there regarding oil consumpotion on the 6.0 in the 2001 model. It's not posted for the 2002--yet: "01-06-01-011 MAR 01 Engine - Oil Consumption Guidelines". The 5.7 has the wrong rings since 1998 and that's one reason it burns oil (and maybe contributing to the slap--I'm not a tech). In 2002 they started using a new ring pack. Eventually, all us oil-burning knockers will be history. They hope to steer us all off with warranties that don't mean much. NO DICE! I am an American!
Is this America where people work hard for their money and expect a decent product in return? Are corporations allowed to cover and misrepresent their mass produced mistakes and bully consumers into accepting it? Let the people speak.
I would prefer that my 6.0L '01 did not have the "knock", or "tick." Mine does not use any oil between approximately 5000 mile changes with Mobil 1. Most of the oil consumption problems I've heard of involved the bad pcv(?) or egr(?) valve. Seemed to be an easy cheap warranty fix. The 8.1L seems to have more of a widespread oil consumption issue. Old 496 did too, didn't it? There must be some engines out there with over 100,000 miles by now. BUT, I have not heard of a single case of engine failure due to the "knock." Have you? Tom
Comments
So that's the end of the story for now, until some auto mag, Consumer Reports or Big Brother steps in to confront GM on this "knock issue".
Ray T.
If it is component only, they are handing out basic gaurd like it was candy.
Remember that the GMCAC number is an Outsourced help line. These are not GM employees
But paid phone operators that know squat about the vehicle you own...
Walter (Gator36)
So much for it being normal though, they obviously know somethings wrong if their starting to give these componet warranties out like candy, anyone who complains seems to get one now. I would think there would be a break point somewhere so as to have a recall issued but who knows what that will take. I may send in a complaint to NHTSA but not sure they would be the proper people to notify on this one, anybody else have any suggestions so GM doesn't get away with this fiasco??
Ray T.
Ray T.
Pretty much on par with the other 2 samples. 21000 miles worth of documentation
on the oil analysis. Every time the copper is high and Tin is slightly over the industry
average.
So here I am at the dealership (wifes new car) and I see the service manager that I have a good rapport with. He asks me about my truck and how it is doing and I mention
the engine knock is getting worse. (Glazed over look) I then mention that I have been sending samples out for the last 13,000 miles and every time the copper is high (2-3 times the average) He is visibly surprised and asks me to bring my truck in along with the reports. (another dealer has given me the "Standard" GM line on the knock)
While it was hard to hear him over some noise, he mentioned that some of the bearings (mains)
are mostly bronze. He had to run as he was being paged. I plan on bringing my truck in next week.
So today I decide to get some stats from the lab that has done the analysis. I call Blackstone labs to talk with them half expecting to get next to no information. To my surprise they get the lab technician that actually did the sampling. He had a copy of my history in front of him and we had a nice long conversation about my motor and similar motors.
This is a brief synopsis of what I learned.
1. If the copper is from the factory fill oil, it should have been out of the engine long before my last sampling. This is of concern.
2. Aluminum is a little high and may be of concern, still not above average.
3. The average that they list on the report is based upon 192 different engines of the same make and model that have had oil sampled. So this is a Vortec 5.3L Specific average.
4. The average is also based upon a 7,100 mile average oil life. That is the average sample has been through 7,100 miles.
5. This lab does oil samples for all makes and models of engines. They may have a person call here an there regarding an engine that has a knock. One here for a Honda, One there for a Toyota..... But there have been a few GM engine owners with complaints. Specifically he remembers at least five people in the last year or two. This is statistically important as there is a definite pattern.
Who knows what this information will do for anyone, but it just may help to get some action.
We will see what the dealer has to say. I will say this I am impressed with the knowledge and customer service of Blackstone Labs and will definitely send them my business.
Walter Howey (Gator36)
Hey at least is gives you something to worry about.
and they think they'll be rid of you, little do they know! LOL
Ray T.
Ray T.
Swoosh Man
Ray T.
just do the required maintenance (oil changes etc)
I plan on mine lasting that long also. I probably will have a new one but will keep this one also
I've been using Mobile 5W-30 conventional oil and the PF59 AC/Delco filters since my truck had 500 miles on it, and it has been knock-free since day 1. Currently have 10,565 miles on it. Not to say that my oil or filter is the fix, just making a comment about what I use.
I have an occasional knock.
Gm even gave me a 5 yr 100K warranty
As Ryan stated I also got the GM letter for extended engine warranty. Truck used mostly weekends for trips to Home Depot/Lowes or towing 18ft travel trailer for outings.
I still love this truck!
Ray T.
don't know if its a coincidence or what, but at my last oil changed, I switched from Mobil1 to Royal Purple synthetic and my engine knock has almost totally gone away. my '00 2500 with 6.0l now has 37,000 miles - the oil change to RP was done at 34,800. The noise can still be heard on very cold mornings, but is much quieter and lasts only a few seconds, whereas before it clattered pretty good for up to a minute.
don't know if the RP oil has anything to do with it, but thought I would pass on the news. Also, have noticed a gradual, verifiable increase in MPG since the switch to RP.
-- Don
BTW, whenever I notice a little knocking in my 2k 6.0L 2500, I just put in on the highway and blow the soot out of it for a few miles. Knock has disappeared every time. Usually shows up when I have been doing a lot of stop and go traffic driving for several days without any highway driving. All in all, really good truck.
thanks, wade
Wadeo1.........I have somewhat the same truck as you. It doesn't surprise me that with one call to GMCS you were offered the extended component warranty, the key point was that you had documented it at your dealers. GM is giving these extended warranties out like cotton candy at the fair as long as you document at dealers and pitch a fit to them about their product reliabiltiy for the long haul.
What really needs to happen is a class action against them to get the ball rolling but that takes deep pockets a good lawyer w/lots of time.
I posted this article before but go here to see the real deal on this knock issue and why it will be awhile before the design change gets to the general population of GM engines. http://www.c5registry.com./2k2z06/page5.htm
Ray T.
I had an independent engine re-builder isolate the knock to only one (#8) cylinder. Could be slap or wrist pin but not normal, he said. Go to gmpistonslap (from google), join the club and get informed. We all want to believe it's normal folks but face the truth. Your grandma's car never sounded like a diesel and if it did, she'd have known it wasn't normal. My next car will be another NISSAN (Hum... can you say 350Z?). All this "buy American" business has spoiled the domestic manufacturers. We are nothing more than test pilots for them--lemmings driving lemons. Unbelievable... Never Again...
Good Luck and keep us informed.
Ray T.
Please answer: Date and location you received the new motor. Dealer's name perhaps?
Also, did you get a new, "crate" motor or a re-manufactured. Others here have been offered re-manufactured engines. Today the BBB hinted to me that I could get one for my 2001, 7K miles, 5.7 knocker/oil burner. I said no way. More problems down the road & car too new. Maybe if I was past warranty by a couple K miles. If you got a crate engine, how did you confirm it was new? How many miles do you have on the truck now?
Thanks from all of us and if you got a new one, it sounds like you got in "under the wire".
The dealer was Larry Miller of Caldwell, Idaho, can't say enough good things about them.
I just had a meeting with the tech rep reguarding my transmission problems. (See my posting in 2000 GMC Tranny Trouble). I also have a piston slap, started at around 10K, complained about it at 18K. I have also had a low engine oil level light come on 1500 miles after an oil change by the dealer. I also have a pre ignition pinging sound at crusing speeds when the engine is loaded just enough to maintain speed. I live in Soutern New Jersey, no hills here, I run 89 octane, but it'll ping with 94 octane Sonoco. Tech rep told me to run Moble 1 Synth for the piston slap, and that the ping was due to the computer leaning out the mix for fuel economy. Sounds like a bunch of CRAP. I am getting a new driveshaft yoke however. The tech rep did hear my CLUNK in my drive line. I went to the site that nomoregm listed and I will be contacting the AG, my US Senators and Rep, and GM Cust Serv. Any one else heard about the Moble 1 line. Dowes it help?
Good Luck and keep us posted as well as the piston slap web site.
Ray T.
kip
I still called GM customer service and ask about an extended warranty. They called my dealer and then offered me the 5 year 100K plan. WITHOUT GETTING NASTY about it, I said that was not good enough. I only drive about 10K per year and thought a 7 year 70K plan like Dodge is offering was a more fair deal for me. She needed to check with her supervisor - would call me back. 15 minutes latter the phone rang - it was the supervisor - he knew I had purchased 3 new GM trucks in the last 4 years - he new the service records of my trucks, he offered a 6 YEAR 100K plan and said he could not go any longer. I accepted the deal and am waiting for the letter.
NWJETBOAT: What was the DATE you received your new motor. Would you be willing to post your service order(s) leading up to the replacement? You can delete your personal info. It might help some others here and at the gmpistonslap site. Thanks in advance.
MENTOR34: It's likely a "trade secret" if the piston re-design was done. To advertise it would be an admission of guilt by GM. They have already started with the Corvette which is getting new teflon coated pistons--go to: http://www.c5registry.com./2k2z06/page5.htm That technology will eventually trickle down into all engines and be called normal evolution--not a fix. [non-permissible content removed] covered.
For now it seems, if you're not getting the teflon pistons, rings, etc., you have a 1 in 3 chance (or more) of getting an oil-burning slapper like ours. Good luck to all the new buyers. Go to http://www.alldata.com/ It's a TSB site--only the titles are free. This is the TSB found there regarding oil consumpotion on the 6.0 in the 2001 model. It's not posted for the 2002--yet: "01-06-01-011 MAR 01 Engine - Oil Consumption Guidelines". The 5.7 has the wrong rings since 1998 and that's one reason it burns oil (and maybe contributing to the slap--I'm not a tech). In 2002 they started using a new ring pack. Eventually, all us oil-burning knockers will be history. They hope to steer us all off with warranties that don't mean much. NO DICE! I am an American!
Are corporations allowed to cover and misrepresent their mass produced mistakes and bully consumers into accepting it?
Let the people speak.
Tom