2017 GMC Sierra 1500: transmission slipping

8 of the 357 complaints about the 2017 GMC Sierra 1500 describe transmission slipping.

owner complaints: 8
of this car's complaints: 2%
recalls: 0

Is there a fix? 94 service bulletins cover this area of the car. See below

Transmission slipping by model year

2024
6
2023
3
2022
2
2021
8
2020
3
2019
10
2018
9
2017
8
2016
3
2015
11
2014
3
2005
1
2001
1
1999
1

What owners say

Filed Dec 3, 2025 · Transmission · WI

Transmission Hard shifts 1-2 or 2-3 Delayed engagement into Drive/Reverse Shudder at 30–60 mph Slipping under light throttle Clunk when stopping The risk I've described to the dealer is that the hard shifts at stop and go in heavy traffic situations could cause and accident. Yes the issue has been confirmed at the dealer and they replaced the transmission. That did not resolve the issue. It has not been inspected. No warnings.

Filed Aug 11, 2025 · Transmission · WA

Driving on highway at 70mph loss of power. Transmision slipping and vehicle rapidly lost speed creating a very hazardous situation. Was able to barley get of highway safely going down to 40mph. Vehicle went into limp mode.

Filed Jul 30, 2025 · Engine, Fuel system · CA

Gear slipping since I’ve had the truck. Replaced parts of motor, new transmission installed and still gear slipping entering the second gear. A big jolt happens every time I accelerate and when I slow down about the 10 mph mark it jolts again. Spent well over $10,000 on major truck repairs. I just don’t understand how this truck has 0 recalls. My truck is similar to all of the v8 Sierras of that year and I strongly feel it should have been recalled due to the gears slipping and not enough power.

Filed Nov 16, 2024 · Transmission · VT

Truck would slip out of gear while in DRIVE in very dangerous situations. Tuck would suddenly jerk forward when in Drive and Stopped at a Stop Sign or light. No warning light or codes. Transmission Specialist evaluated and determined that Transmission was about to have a critical failure. The 6L80 transmission was replaced with 109,933 original miles on it.

Filed Oct 2, 2024 · Transmission · NV

The automatic transmission occasionally slips and slams hard into gear between first and second gears, causing the truck to lunge forward when attempting to stop. This could potentially cause the truck to hit another person or vehicle when attempting to stop. This problem was immediately observed upon receiving the new truck in 2017 and is ocurring more frequently over time. The problem was reported to and taken in to the GMC dealer. They advised that they were unable to reproduce the problem during their time with the truck. There have been no safety incidents thus far. No warning lamps or messages have been displayed on the dashboard.

Filed Mar 6, 2024 · Transmission · IL

Truck has always shifted rough, now with only has 102,000 miles has been serviced regularly exclusively at the dealership. It started slipping gears and I was just informed by the dealer that the torque converter detonated and the entire transmission must be replaced.

Filed Aug 13, 2023 · Transmission · WV

Transmission slipping in and out of gear. Transmission was serviced 5,000 miles previous to this for the 100,000 mile service at 95,000 miles. No issues were found at the time of service, now truck will slip out of gear on highways without warning. Transmission fluid is not dirty or burnt. Common reported issue according to online discussions and GMC needs to recall this model transmission

Filed May 21, 2020 · Brakes, Engine · 69,000 miles · TX

Our truck is less than three years old with approximately 69000 miles. The transmission just started slipping out of the blue while driving thru a neighborhood. While in drive it would move but once accelerating it would rev up and not change gears. This happened without warning, without an engine or warning light. We do all the necessary regular maintenance. In addition two years ago while the truck was a year old, the brakes went out while driving on the interstate. I guess it was the brake vacuum pump or whatever that didn't allow the brake peddle to be pressed which provided me with no brakes. Again with absolutely no warning! This later became recall issue but not before it had already happened to me! I understand there is a class action law suit against gmc for transmission problems and I would consider being a part of this. This is a 50;000$ and relatively new truck, this is unacceptable! The dealer now wants over 4000$ for repairs.