2015 GMC Sierra 1500: shudder or vibration when accelerating

Filed Oct 21, 2026 · Transmission · TN

The 6-speed automatic transmission (6L80) developed a severe shudder during normal driving. A service center diagnosed the problem as torque converter clutch failure; the torque converter sheds metal debris through the transmission, so the transmission now requires a full rebuild quoted at approximately $6,000. The failure occurred at approximately 92,000 miles in October 2026 (incident date is approximate). This is a widely documented failure pattern on GM 6L80 transmissions. Loss of reliable power delivery from the transmission is a safety concern. No crash, no injuries, and no fire occurred. The vehicle is available for inspection upon request.

Filed Sep 22, 2026 · Transmission · FL

The transmission Started Shuddering, it would slip occasionally and slipped badly when i was driving in rush hour traffic in the middle of a left turn. had no power for several seconds then it finally reengaged. The shuddering got worse and worse to the point i took it to a transmission shop to look at it and they said i needed a replacement transmission unit. I did get a replacement unit, the whole process was extremely unpleasant. The previous unit was sent as a core to be remanufactured. The company that i used to get a remanufactured unit is Fraser Transmissions. No warning lamps appeared prior to the transmission acting up.

Filed Mar 17, 2025 · Transmission · MI

I believe the torque converter failed and resulted in the transmission starting to fail. It still goes down the road but shudders when slowly gaining speed

Filed Feb 5, 2025 · Engine · ID

Purchased this vehicle on 06/29/2023 from Robideaux Motors in Coeur d Alene ID. with 81,397 mile on the odometer. On 01/05/2024 the 6.2L engine with 84,109 miles, started having a ticking sound after starting it at my son's house two miles from home. I called the dealer and was told to bring it in for diagnosis by a tech. While driving the truck to the dealer the ticking got worse and motor started to shudder and the check engine light came on. Cause was a misfire on cylinder 4 due to bent push rod and failed lifter. Replaced lifter bank 2 with new push rod. Total cost was $2,852.74 (have invoice). After many calls and letters to my extended warranty company, they finally paid $1688.54 of the total cost. On 08/29/2024 the same ticking sound started again as well as the shudder and check engine light. I had it towed back to Robideaux Motors and was told it was a misfire on cylinder 6 due to lifter failure. Robideaux Motors did repair under their repair warranty. I know that this vehicle is not included in class action suit, due to the year. I feel this to be a continuing problem with the GM 6.2 and 5.3L motors encompassing many model years. Just wanted to document that the number of years covered in the law suit should be expanded.

Filed Jan 24, 2025 · Transmission · 97,000 miles · AL

The contact owns a 2015 GMC Sierra 1500. The contact stated while driving 30-35 MPH in third and fourth gears, the vehicle vibrated and shuddered significantly. The check engine warning light was illuminated. The contact stated that upon shifting out of third and fourth gear, the vehicle responded as needed. The contact stated that the failure progressively worsened while driving in third and fourth gear. The vehicle was taken to Wyatt's Automotive Repair, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was repaired. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 97,000.

Filed Sep 3, 2024 · Transmission · 140,000 miles · TX

The contact owns a 2015 GMC Sierra 1500. The contact stated that the vehicle shuddered upon depression of the accelerator pedal, there was no warning light illuminated. Upon investigation, the contact determined that the failure was likely caused by the torque converter. The dealer was contacted about the failure and informed the contact to take the vehicle for an inspection. The contact took the vehicle to an independent mechanic where the torque converter was flushed, and the transmission filter was replaced. Despite the repair, the contact stated that the failure worsened soon after the repair. The vehicle was taken back to the independent mechanic where the vehicle remained. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline to file a complaint. The vehicle was not repaired. The failure mileage was approximately 140,000.

Filed Dec 13, 2023 · GA

The truck has only 122, 230 miles and shuddering in the transmission is horrible. I just purchased the truck 3 weeks ago and the owner stated nothing was wrong with it. However I took it to mechanic for inspection after purchase and he stated transmission has shuddering. I noticed at 40 miles plus the truck vibrates at steering wheel.

Filed Aug 13, 2023 · Transmission · IL

Transmission was shuddering and slipping and then completely went out. Would not engage any of the gears. This happened while driving through the mountains without towing anything. My family and others on the mountain were at risk since the transmission was slipping out of gear and no safe place to pull over. It had to be towed to a dealer and they confirmed the transmission was toast and they replaced it, of course not under warranty. $800 tow bill and $6.893.98 to replace the transmission at a GM Dealer...Also, had to get a rental car ($318).

Filed May 1, 2022 · Transmission · ME

The transmission is lurching forward when initially put into "D" then when driving it seems to be confused on which gear to go into especially between 40- 50. The other problem is the truck will make a shudder like driving over a washboard but only on smooth pavement, then shift into allow gear and the engine will rev up. is this something that the dealer will repair. I'm concerned to drive it.

Filed Oct 19, 2020 · Brakes · 65,000 miles · CO

2015 gmc sierra 1500. Had the brake pump vacuum recall performed not too long ago. This issue actually seems worse now. I was backing out of a parking spot - low speed was the issue previously- and applied the brake. Nothing happened, no brakes (pedal was depressed) truck continued to back out and I had to jam on the brake again, only then did the truck brake system shudder and engage enough for me to stop. This happens at low low speeds - crawling traffic, parking lots etc.... I got to tap the brake pedal to slow a bit and nothing occurs - or the pedal pushes back at me giving me no brakes. I have to completely disengage the pedal and then forcefully engage the pedal again to get any kind of braking. I have only noticed this at very slow speeds. This is terribly scary when we are crawling down a steep mountain highway with bumper to bumper traffic and I get no brake response. Like I said, the truck went in for a recall that was supposed to have fixed this issue.

Filed May 6, 2019 · Transmission · 58,000 miles · OH

Tcc shudder

Filed Apr 26, 2019 · Transmission · 102,000 miles · AR

Transmission shifted hard, delayed acceleration at times, shuddered and jerked. This was usually slowing down to turn around 30 or 40 MPH as the truck was in motion. After only two years the entire transmission had to be rebuilt. The transmission was shifting poorly the moment I drove it off the lot even if it "adaptive learning" you could tell there was something wrong.