2015 GMC Yukon XL: complete transmission failure

Filed May 28, 2025 · Brakes · MI

I purchased a 2015 GMC Yukon in March 2024 I drive the vehicle 9 mons, 7500 miles the vehicle has been in service at my local dealership since Dec 13, 2024, for engine and transmission replacement, I have had the vehicle back 3 weeks not the warning light and service warning chime for the "Service Trailer Brake System is on, I have not ever use a trailer with the vehicle, I was told the vehicle needs a wire harness, I have read this a problem in these vehicles that has not been addressed GMC with a recall, I have put A LOT of money in the vehicle. This is an well documented failure in the trailer brake system that GM should repair at no cost to the consumer

Filed Apr 10, 2025 · Transmission · GA

As I was driving on the highway the check engine lights pops on and the engine starts stalling. The stability track light also came on and the truck was hard to maintain and drive. The truck has been maintained and serviced on a meticulous schedule. This is not the first major problem we have experienced with the truck, we had to do a full transmission replacement on the truck at an 118,000 miles mark. Me and my family have been the only drivers and owner of the vehicle and mostly on put highway miles. I am so frustrated and disappointed in the workmanship and quality of our vehicle.

Filed Jan 9, 2025 · Transmission · CA

Transmission failed and was replaced by GM dealership under warranty at 20,670 miles after rough shifts and jerking and lurching movements when driving and when putting vehicle in gear. Truck would also roll if on a hill in Park. Now at 53,438 miles, the same dangerous problems are occurring with only 33,000 miles on the replaced transmission and after inspection, the dealership says the transmission needs to be replaced again. Appears GMC transmission is faulty and dangerous to drive and needs replacement very early in cars lifespan and a transmission should not need replacement so early especially when maintained correctly. Transmissions should last more than 20,000 or 30,000 miles before failing. Estimate for new transmission is $10,000. Called GMC customer service and said nothing they can do out of warranty. Dealership inspected and confirmed problems both times. Check engine light appeared the 2nd time indicating transmission failure but not the first time.

Filed Oct 30, 2023 · Transmission · CA

While driving our GMC Yukon XL, the vehicle will begin shuttering, losing power, slip gears, or unable to shift gears. On one occasion, the vehicle lost was unable to accelerate and maintain speed causing my wife to quickly respond by changing lanes and pulling off on the shoulder of a road, in a very dangerous situation, all while coasting without engine power. Two independent mechanic shops have reported that the torque converted failed and had sent metal fragments throughout the transmission, and ruining the transmission. Both mechanics recommended a new transmission.

Filed Feb 3, 2021 · Transmission · 162,000 miles · GA

My 2015 yukon xl slt transmission developed a stutter while going along accelerating but would go away as you drive. Unfortunately this came to an abrupt end this past january when I jumped in it and went about 50 feet and the vehicle sounded like it was in neutral and I couldn't go anywhere without cutting it off and starting over which only caused the process to repeat.. I had my mechanic tow it to their shop and diagnose the problem. The told me the transmission was malfunctioning. I had a second opinion from the dealership I bought it from and the conclusion was the same. The vehicle had 162k on it and I was expecting it to match what my previous yukon reached and was still going. Over $4k later with new transmission, I'm keeping my fingers crossed. This shouldn't have happened this soon.

Filed Jun 14, 2016 · Transmission · 1,800 miles · FL

Replaced transmission with dealer 2 time