Transmission Failure problems of the 2002 GMC Envoy

Transmission failure at 60,000 miles due to defective parts installed during the original manufacturing process.

Transmission failure.

I own a 2002 GMC Envoy with 49,000 miles. The transmission failed, did not want to shift from first, then no reverse when I left the destination. Had towed to dealer. Service manager stated she had a hunch what it was but had to get it in the shop first. Sure enough, the sun shell failed and the transmission has to be replaced. Called gm customer service in an attempt to get them to fix it at there expense since this is an regular occurrence with there trucks. Have not heard back as of yet. Seen many many many posts around the internet about this very problem. This should be looked into.

Transmission failure.

Have a 2002 GMC Envoy, bought new. 8 recalls, ball joint and speaker failures. At 32000. Miles, the transmission failed. Dealer diagnosed with sun-shell gear problem, that was addressed by a gm repair bulletin. At 37000. Transmission failed again. Dealer advised the entire transmission needed replacement, but it was not related to his oct. 05 repair. Contacted gm customer service, have a file number, but have not heard from anyone in 2 weeks. They advise that the gm area representative has not called anyone back, either the dealer or gm cs. ?? asked to contact him myself and was told I could not do that. Asked where I could contact ceo rick wagoner and was told that no one can give out that info. A bunker in colarado maybe?.

2002 GMC Envoy with 31,000 mile experienced transmission failure (no reverse). The dealer said that it was the "sunshell" gear and normally would cost $2300 to repair, but, out of the goodness of their heart they would only charge me a $500 deductible (I assume it is on some type of warranty that they have) plus fluids, so my grand total would only be around $600. On the surface this seemed like a good deal but after a little research it turns out there are many other Envoy and trailblazer owners who have had the same problem. It is clear that there is some sort of defect and appears gm has it covered under some type of warranty and is sticking the consumer with their $500 deductible when they should be paying for the entire repair.

The transmission on my 2002 Envoy XLT went out this morning on my way to work. I barely missed having an accident while passing a semi and injuring myself and others. The Envoy has 69,000 miles on it and the transmission should have lasted much longer. . Read more...

I own a 2002 GMC Envoy that I purchased new in February 2002. On 24 may 2005, the transmission failed with 68,920 miles on the odometer. There was no reverse or drive. The vehicle operated marginally in gears 3,2,and 1---enough to limp into the dealer. Luckily, it didn't fail on the highway. . . Or I might not be here writing this complaint! after tearing down/checking out the transmission, the technician found a damaged sun reaction shell and sun gear. The parts were replaced, along with new gaskets and seals, the transmission cleaned and power flushed. The total cost of this effort was $2277. :-( :-( in doing a bit of research on this particular failure, I've discovered other GMC Envoy, Oldsmobile bravada, and trail blazer owners have been victims too. According to one of them, who works in the service department of a gm dealer, the repair instructions state the material used in the sun shell of the 02 blazer, Envoy, and olds bravada wasn't able to withstand the heat in the transmission, causing it to strip (which is exactly what happened in my vehicle). He goes on to state. That in vehicles from 2003 on, gm used a "more heat resistant material" in the transmission that reduces the likelihood of the sun gear failure. I'm writing this complaint because I believe the root cause of my transmission failure. . . And those experienced by other owners. . . Was due to faulty material. . . Which the manufacturer knew about. . . Yet didn't inform the consumer about. I've never owned a vehicle, gm or otherwise, where the transmission failed at a young 68,000 miles! help please!.

I have had three total transmission failures. The first was in Dec, 2002 at 14,000 miles. The second was in Dec 2003 at 36,000 miles. The third was Jan 2005 at 58,000 miles. Each time the dealership repaired the car but can not determine the reason for the failure. The last failure was with my five year old granddaughter in the car and we were pulling into oncoming traffic. Since they have not determined the root cause of the failure I see no reason to think it will not happen again.

Contact stated transmission went out at around 29,415 miles. Transmission failed while driving at 20 mph, and leaving him stranded. Transmission has been repaired. The service dealer replace the sun gear, and stated this was a known problem within the GMC Envoy.

While driving, car suddenly shut down completely with no warning. Second problem: transmission failed while towing 3300 lbs or less on two separate occasions.