Engine Problems of GMC Envoy

Driving on us highway 20 at posted speed limit 55mph. Vehicle suddenly loses power with no response to accelerator inputs. Heavy traffic and limited pull off area. Vehicle will restart, drive 1-2 miles same problem. Gas gauge 1/3 full. No trouble codes. 3 occurrences in week. Vehicle is now parked in garage. Odometer less than 56000 miles. Each time no dash lights displayed. Message center displays stop engine.

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2005 GMC Envoy.

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The contact owns a 2003 GMC Envoy. While driving 65 mph, the oil warning indicator light illuminated and the vehicle came to a complete stop. The vehicle was steered to the side of the road and towed. The dealer stated that the engine locked and needed to be replaced due to an oil drain plug that loosened. The current and failure mileages were 55,000.

Vehicle has intermittent throttle problem that causes the throttle to surge and the headlights to go dim to bright and dash lights to go dim to bright. This condition happens intermittently, and the dealership states there is no problem. This condition is most dangerous when driving in confined spaces such as parking lots. I have taken this problem to the selling dealership four times since July 2006 and continue to be told there was no problem.

: the contact stated while driving 20 mph a noise was heard from the engine and the clutch fan was sticking. The vehicle was taken to an independent repair shop for inspection. The mechanic determined the clutch fan needed to be replaced. The clutch fan was replaced and the manufacturer was alerted.

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One week ago I purchased a 2003 Envoy sle 4wd, it has 200 miles on it currently and noticed upon delivery that a molding around the drivers side door is crooked. And 2 days ago I noticed a large puddle of fresh oil under my vehicle, and my oil light went on this morning. I haven't even had this vehicle for one week and I have to take it in for repairs. This does not make me feel overly comfortable about my purchase.

Engine died at high speed on highway, fortunately no accident. Engine had to be replaced by gm due to defective manufacture, piston ring slipped and damaged drive shaft. Extremely frustrating experience dealing with gm.

Vehicle's air bag light keep flashing/ vehicle running on high rpm's. Air bag sensor replaced and calibrations had to be updated. Additional problems included faded window moldings, loss of power and steering. Ignition switch and fuse block was replaced. Inoperative power mirrors. Parts had to be ordered. Consumer was upset with the number of problems experienced with vehicle and the number of recalls on this new SUV.

02/11/02 4,667 miles everything shut off. Engine stopped while driving. Restarted at 2000 rpm with lots of noise. 05/29/02 7,463 miles vehicle died and would not restart until after 15-20 minutes 06/05/02 7,664 miles vehicle died while driving and would not restart until after 15-20 minutes 11/13/02 11,528 miles backing out of driveway engine died. Would not restart. Towed in. 06/10/03 17,865 miles died while driving. Dealer did not even look into this. 06/14 to 06/18/03 18,000 to 18,214 miles car off road for 5 days due to engine died while driving. I referenced ecas and pcm problem NHTSA defect summary ea03007. Dealer tells us no-one else has had this problem. Suggests driving round dealership until problem occurs, and then calling them. Don't try to start until they come out (never mind we're in the middle of a busy road and in the evening time when they are closed). We are lucky we were not rear-ended this last time. GMC refuse to replace ecas wiring bundle and pcm solution per ea03007. Help!!! help!!! please help!!!.

Upon being inspected at the nearest local dealership, the #6 piston was found to have "splintered" a half moon piece off the top of the piston head. This in turn "popped" the cylinder sleeve retaining ring from the top of the cylinder when the piston came up. With the ring removed, the cylinder sleeve also rose outside of the cylinder wall and was caught by the piston on the downward travel. The complete engine was replaced. Vehicle was in the shop for 20 days. The dealer's shop foreman checked the records and found that 150 other engines will be directly affected with a possible 180 probably affected.

While stopped the engine ran at 900 rpm's. After the brake was released the rpm's climbed to 1100 and the vehicle accelerated suddenly. The dealer replaced the fuel emissions canister once, and reset the electrical codes, and replaced the fuel tank, but the problem recurred.