Gasoline Engine Problems of GMC Sierra

Hard knock of engine on startup,worse in colder weather, lasting a couple of minutes. Have reported problem to manufacturer and dealership whom both state this knock is normal and would have no bearing on the longevity or durability of the motor. First noticed knock after approximately 3600 miles and continues to be a problem at 36,000miles.

See all problems of the 2002 GMC Sierra 🔎.

No summary listed for above vehicle.

Front crash at 40 mph, neither airbag deployed. Driver suffered knee and facial injuries, damage to vehicle was $20000. 00.

See all problems of the 2001 GMC Sierra 🔎.

The engine was replaced at 66151 miles, consumer believes there is a defect in workmanship or material which may have caused this failure at such low mileage.

See all problems of the 1996 GMC Sierra 🔎.

The engine was replaced at 66151 miles, consumer believes there is a defect in workmanship or material which may have caused this failure at such low mileage.

At 42,000 miles truck needed a new transmission and at 66,151 miles truck needed a new motor.

Engine knock at start up for approx 10-30 seconds.

Problem only occures when engine and transmission are completly warmed and transmission is in overdrive mode. If transmission is in drive "3" no problems occur at any engine speed. Dealer states on repair order, "normal condition at this time until an update comes out". Suggestion was made by dealer that this could be caused by tourque converter.

See all problems of the 2000 GMC Sierra 🔎.

The consumer had the first oil change at 3500 miles and ever since then has had to add 1 quart of oil every 2 weeks, the vehicle is currently at the dealer .

There is and has been an engine knock since 7/2000, has been in shop 6 times for same problem, GMC contends carbon knock, getting worse. Idles rough, told by dealer and GMC it is a characteristic of vehicle. GMC says they will continue to hornor warranty. What happens when warranty exprires, and the piston comes through the block. Drivetrain hestiates when in gear.

This problem occured first in October 1998 and courtesy pontiac, where the vehicle was purchased did not find the problem! last week upon returning from new mexico the engine lost power in missouri and I stopped at a gasstation and found that there was no coolant in the tank. This was refilled and one exit further the oil was checked after the problem did not appear to be corrected. This time no oil was in the engine. Before the travel a GMC dealer in shelbyville ky did the maintenance on it, filling 5 quarts of oil in!.

See all problems of the 1998 GMC Sierra 🔎.

The rear rotors u-joint, carbon build up on throttle, replaced window motor uses 2 qts of oil every 400 to 500 miles , transmission uses 1 qt of oil every 20000 miles , air conditioner fan does not work on high I believe the throttle build up is a safety issue with the gas petal sticking. We have a lemon.

See all problems of the 1999 GMC Sierra 🔎.

I found 29 pages of the same problems on net lemon law. No safety defect mentioned in summary.

See all problems of the 1997 GMC Sierra 🔎.

At various speeds the engine will cut off without warning. Dealer can't find the problem.

Engine knocks loudly at start-up and last for aprox. 2 minutes - dealer said this is a normal occurrence. The engine also has spark knock when accelerating and dealer also says this is normal - dealer said this is due to carbon build up on ring lands and could be temporarily repaired but would re-occur within 10,ooo miles. This problem started at 15,000 miles and continues to date. I cannot solve the problem with any type of additive advised by the dealer. Dealer said GMC has a defective engine and I have to live with it. They told me even if they replaced the motor I would have the same problem with the knocking and pinging on accelleration. The dealer contacted GMC technical advisor dan pratner case # 3970330 and he advised them this was normal for this engine. I find it hard to believe a person can purchase a vehicle with a defective engine and be told this is normal. The public needs to know before they buy this particular product so they do not end up with a defective product that will cause them additional maintenance costs and a very low resale value not to speak of the embarrassment of having a vehicle that knocks loudly on cold start-up. I do not know what the long term effects of this engine knocking will do. If you do investigate this problem and find this to be caused by another problem that can be repaired, please let me know. Thank you for your time.

Consumer state while traveling 60 mph consumer notice gray smoke coming from vehicle consumer pulled vehicle over and noticed flames under vehicle consumer put fire out. Dealer has been contacted and stated fire came from transmission. Please provide further information. Nlm.

While driving at 80mph the vehicle will sporadically go out while switching lanes, then kicks back in after a few seconds. Dealer can't solve problem.

Consumer heard a loud knock in the engine when starting, the dealer was contacted and indicated that the knock was not affecting the durability of vehicle. Nlm.