Transmission Failure Problems of GMC Envoy

Tl the contact owns a 2006 GMC Envoy. While accelerating from an intersection, the vehicle failed to accelerate. The contact managed to veer to the shoulder of the road. When the vehicle was turned off and restarted, it failed to resume normal operation. The vehicle was towed to an independent mechanic who diagnosed that the transmission failed and needed to be replaced. The vehicle was not repaired. The dealer and manufacturer were not made aware of the failure. The failure mileage was approximately 131,000.

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Tl-the contact owns a 2004 GMC Envoy xl. The contact stated that while driving approximately 60 mph, the vehicle lost acceleration and started to slow down. The contact pulled at a gas station and proceeded to check all the fluids. The contact continued to drive the vehicle, then the check engine warning indicator illuminated and the vehicle continued to drive only in first and second gear. The vehicle was driven to an unknown independent mechanic, that determined that the transmission failed and needed replacement. The vehicle was not repaired. The dealer was not contacted. The manufacturer was made aware of the failure and a complaint was filed number: 84441281449. The approximate failure mileage was 140,395. Bp.

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Driver had just exited a parking lot onto a main road in the evening. The car was cold, had not been used since the morning. The car failed to take power after slowing down for a light that was red than changed to green. The car was on and in drive, but failed to go further. There was no warning whatsoever. The driver braked and stopped, nearly causing the car behind to rear end the GMC. GMC driver had put flashers on immediately. The car was put in park, turned off, than restarted. The GMC was put into drive, but again would only roll. The driver put the car into gear 3 on the auto trans, than 2. In gear 2, the car moved. The GMC was immediately moved back to its parking spot. A diagnostic shows the transmission has failed. Only 94,500 miles, and the gm transmission is dead. In looking on line at certain consumer data and speaking to local mechanics, all point to transmission failures on the gm SUV products, including Chevrolet trailblazer & GMC Envoy.

This morning, my wife was parking at one of our kid's schools when the transmission system failed to respond. She attempted to put the vehicle in park, but it would not initially. Once the shifter would move forward, the vehicle died, and continued to roll forward even though the shifter was positioned as if in park. She had the presence of mind to let it roll until striking the parking spot cement bumper. She removed the key from the ignition, then attempted to restart the vehicle with no success and the shifter button would not depress. She panicked because of loosing control of the vehicle with so many small kids around and called me. I left work, and upon arrival attempted to troubleshoot what caused the incident. I started at the shifter, so I loosened all the covers around it, in case there was something binding the shifter. I actually did find several small items that had fallen in the compartment through the front edge of the center console cover assembly. Removing these items still did not allow restarting of the vehicle. I then looked underneath the vehicle, and discovered that the linkage from the shifter to the transmission had separated. I manipulated the input lever at the transmission with my hand and noticed that it had movement in both directions, which meant the transmission was actually not in park. After positioning the input lever at the transmission to park, the vehicle did start. I shut the vehicle off and reconnected the separated linkage. I was shocked to see that the piece that maintains such an important linkage connected appears to be made from a plastic. To me this is a major issue that can cause someone to potentially have a vehicle stuck in a movement causing gear, and due to a linkage separtation have no way to properly turn the vehicle off (until it runs out of gas), to made from plastic. Please look into this.

The transmission failed in my 2003 GMC Envoy with approx 95,000 miles. While driving down the road I went to pass a slow moving vehicle. As the transmission down shifted there was a "bang" so I pulled over to look under the truck, and made sure nothing had fallen off. I got back in the s. U. V. And made my way back home with no problem. The next day when I went to back out of my drive way there was no reverse. I called a local gm dealership and was told that the problem appears to the sunshell gear. According to multiple post online, seems to be a common failure among Envoy's and trailblazer. I checked the fluid and it appears to be fine, not low, not burnt, and still red and clean.

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The contact owns a 2004 GMC Envoy. The speedometer read 35 mph while driving at 70 mph. The vehicle was taken to a local garage. Diagnostic testing located failure at the transmission shifter cable, which was replaced. Other unknown parts were also replaced. The instrumental control panel sensor was replaced, but the failure was not corrected, the transmission failed again. The manufacturer took a report, but they would not assist with the repair. The vehicle had not been repaired. The failure mileage was 75,000 and the current mileage was 93,000.

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

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Transmission failure, mechanic can not find what the cause is from, gmac sent a technical service bulletin to the mechanic that states this problem has been seen with these vehicles, no guarantee it will not happen again.

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Transmission failure.

The transmission failed in my 2003 GMC Envoy with 82,000 miles. The problem appears to the sunshell gear which seems to be a common failure with this transmission. Because the transmission was downshifting hard, I took the car to a GMC dealer less than 1000 miles ago to have the transmission looked at. I was told my the dealer that there was a problem but not to worry about it. Now the transmission has no reverse and the repair estimate is $1,800.

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.