2017 Chevrolet Colorado: complete transmission failure

Filed Nov 7, 2026 · Transmission · OH

I purchased a new 2017 Chevrolet Colorado on XXX. On about XXX the truck started shuddering or not shifting correctly. I took my truck to the local dealer [XXX] GM. There the diagnosed the problem to be the torque converter. According to what they told me GM instructed them to drain and replace the transmission fluid. GM knew the 8-speed transmission had a design defect in the torque converter. The torque converter clutch fails to engage smoothly, creating the shudder vibration. A fluid flush treats the symptom, not the cause. GM was permitted to put a band aid on a problem to get the vehicle through any warranty and make it not their responsible. The vehicle was returned to me, even after I complained to the dealer that this was not fixing the problem. And the truck continued to have a pause in the shifting. On about XXX the shuddering became much more apparent. I made an appointment with this same dealer that had done all of my service. On about XXX they did confirm the the problem was the torque converter. At this point the truck was no longer under the warranty, so GM had succeeded in putting the replacement of the faulty torque converter on me the consumer. As a consumer I feel I have been failed by a system we have in place to protect consumers from dishonest Corporate transactions. This process cost me $4000.00 out of pocket, and 11 days without the use of my truck. All of this transpired, because GM decided to not do what was right and fix what they knew was defective. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 12, 2023 · Transmission · SC

Purchased vehicle new in 2017 with 14 miles. In June 2018 at 17,500 miles vehicle developed a sever transmission shudder. Took the vehicle to the Chevrolet dealership where purchased. They replaced the transmission fluid and torque converter. Now, in July 2023 at 79,000 the transmission shudder has returned. This shudder affects my ability to control the car’s speed, acceleration, and deceleration and increases the risk of collision. Took the vehicle back to a dealership. They now recommend a full transmission replacement at $5,900. They will cover only $237 of the cost since the vehicle is past 5 years and 60,000 miles.

Filed Jan 26, 2022 · Transmission · OR

Hard shifting, missed shifts, shudder from TQ converter. For six months the vehicle has been shifting had at random times during shift sequences. Hard shifts occur on both moderate acceleration and hard acceleration. Shifts can only be described as sudden and violent, feeling something like a U-joint failure, broken transmission mount, or a clutch slipping and then slamming into gear. The hard shifts occur and any speed and any gear, but are very noticeable around 3rd / 4th. The TQ converter slips on acceleration only. Has been in the dealer 3 times for a total of 7 days so far with one technician claiming it needs a new TQ converter and possibly a new transmission. Other techs claim they can't find the problem. No codes, no lights. Dealer claims they can feel the problem but have failed to diagnose it. Failure of this could pose to be a serious safety issue if it happens at highway speed in traffic. GM has the inventory of 6L50 transmissions on lockdown.

Filed Feb 2, 2021 · Transmission · 18,466 miles · OH

Tl* the contact owns a 2017 chevrolet colorado. The contact stated that the transmission failed. The contact stated that while shifting gears the transmission shifted hard, slammed, and made clunking noise while shifting to park, reverse or drive. The contact stated that the failure occurred whenever the temperature was at 30 degrees or lower. The vehicle was taken to classic chevrolet (6877 center street, mentor, oh 44060, (440) 953-1070) for diagnostic testing. The dealer advised the contact that the transmission gear failure was a characteristic of the vehicle and there was nothing wrong with the vehicle. The dealer also provided the contact with a technical service bulletin that referenced the transmission issues. The manufacturer was contacted. The vehicle was not repaired. The failure mileage was 18,466.

Filed Sep 9, 2020 · Transmission · 34,000 miles · VA

Transmission: my vehicle was making a sound, as if something was rubbing. Called dealer from where I purchased it and they replaced the transmission fluid. I'm not comfortable with just replacing the transmission fluid. Hoping to not have something else going on with transmission. They replaced the transmission fluid with a different type of transmission fluid. I had just entered interstate 81, when the runbbing sound, started to occur. The service advisor told me the transmission fluid that was originally put in when it was manufactured, was the wrong fluid.

Filed May 29, 2020 · Transmission · 10 miles · NJ

I experience a vibration at the front of my truck when I accelerated at highway speeds. I was told by my dealership that I needed new transmission fluid. They said that shavings got into the fluid. Causing this problem. I asked if my transmission was damaged and they said no. They wanted me to use the car for 200 hundred miles and report back to them if the problem persists. I have doubts that this is going to solve the problem. Whatever contaminated the transmission the first time will probably happen again. I want some protection in case my transmission fails after warranty period ends. I cannot afford this out of pocket repair. I was not notified by chevy that this was a problem. I was getting an oil change and mentioned to them if they would check out the front end of the truck.. Then they mentioned to me that their was a service bulletin from chevy about this problem. Why wasn't I notified about this problem?? Repair date, transmission fluid changed 5/27/2020.

Filed Dec 9, 2019 · Transmission · TX

2017 colorado, 19632 miles, hard up/down shifts to first gear and shudders while driving, found bulletin 18na355, dealer huffines chevrolet plano tx replaced transmission fluid per bulletin and resolved shuddering issue but not hard shifting in and out of first gear and dealership will not return calls to resolve problem.

Filed Dec 6, 2019 · Transmission · 30,000 miles · GA

Transmission shutters when going at a constant speed. This started around 10k miles and the dealership has tried to fix it three times without success. First two times they replaced the torque converter and third time they replaced the transmissions fluid. The truck also shifts very hard from first gear to second gear with a huge jerking motion around 10 MPH. This is very dangerous when driving in parking lots or anywhere near pedestrians. Finally, when compressing the brake at 25mph the truck jerks very violently down to the next gear. The transmission in these trucks needs to be recalled and replaced soon.