Drive ability issues, feels like going over cattle guard, shudders when accelerating around 40-60 mph. the vehicle shudder's abnormally. there are no warning lights illuminated. Took to local Chevrolet dealership where a service bulletin, TSB: 21-NA-047 was discovered to address the issue. The dealer recommended a transmission fluid flush. Mileage on this vehicle was 67,631.

- Shawnee, KS, USA

No warning lights are illuminated but have this consistent violent Engine rattle/shuddering that is getting worse and worse. Also when looking under the hood the Crank pulley wobbles/rattles when truck is idle. Was told it could be the harmonic balancer going out due to there being a gap between that and the Crank. The truck only has 100,000 miles on it. I got it used at 88,000 miles and have barely had the truck for a year now, the steering wheel was intermittently difficult to maneuver and no warning lights illuminate, the truck shifts hard from 1st to second gear now and seriously hesitates to accelerate. This is extremely concerning and apparently an ongoing complaint for this vehicle and something should be done about it. Not only does it cause financial destress on the owners of the vehicles but also a safety hazard to the driver

- San Tan Valley, AZ, USA

COMPLAINT # 11630574 Transmission Shudder, took to dealership on 09/28/2023 had transmission flushed and changed fluid to new style transmission fluid, per GM under warranty. I was told that if it needed done again that i would have to pay to have it done and would cost approximately $400- $500. On 12/13/2024 the truck is shuddering again at 48,700 miles.

- Enid, OK, USA

The contact owns a 2020 Chevrolet Colorado. The contact stated while driving 30-50 MPH, the vehicle shuddered abnormally. There were no warning lights illuminated. The vehicle was taken to the local dealer to be diagnosed and the dealer became aware that the vehicle was shuddering at 35 MPH. The dealer recommended a transmission fluid flush and refill. The vehicle was not repaired. The manufacturer was contacted and referred the contact to the NHTSA Hotline. The contact was also made aware of TSB: 21-NA-047. The approximate failure mileage was 56,000.

- Tinley Park, IL, USA

The Automatic 8-Speed Transmission completely deteriorated after 4 years/64,000 miles exactly after the Power Train Warranty. No warning lights or signals identified me of the problem, only a noticeable shuddering when driving at highway speeds. This vehicle is currently at the dealership where they have confirmed I will need a new transmission to replace the faulty original manufacturer's transmission. My safety and others' safety is/was affected by a faulty piece of equipment that was destroyed with regular use. This could potentially lead to my vehicle being unable to shift up/down during traffic leading to an injury or worse.

- Birmingham, AL, USA

At about 58000 miles my vehicle began to shake violently as I drove it. I initially thought the wheels were out of balance or I had a leaf spring issue. Had both issues looked at and that was not it. Took it to a Chevy dealer who wanted 200 dollars just to look at it. By this time I was just over 60k miles. Did a lot of research online and found that if you had the transmission flushed that would resolve the issue. Had they done and problem solved. Now at 80k miles and it's doing it again. Called Chevrolet dealership who told me it would be 5 weeks, $500 and I should probably call another dealer to see if I could get it in and that is for them to just flush it again. Chevrolet has a well known issue with these transmissions and are not offering any assistance but to try and get you past the 60k mileage where they say not their problem.

- Troy , OH, USA

The rear differential suddenly broke down on my way to take the freeway, making a very clicking loud noise of the rear wheel and Colorado was responding to the transmission do to a differential failure.and I noticed that oil was all over the road

- Phoenix, AZ, USA

A transmission shudder has developed. It seems to be a known issue that Chevrolet has tried to resolve, but it is present in my vehicle. It started to develop around 60,000 miles ago and has progressively gotten worse.

- Montgomery, TX, USA

Transmission shudder unless I put vehicle in tow haul. Shudders at a out 35 40 miles per hour. Seems to be a recurring problem from 2018 forward. This vehicle has only about 25 000 miles on it. I researched and also spike to a transmission person and they think it may be a computer issue. Supposedly they replace transmission fluid if that doesn't fix they replace took convertor. The problem I have is this is a long time recurring problem that should be identified and fixed by General Motors. A vehicle with such low miles built 2 years after they are aware these transmissions have the what's called dreaded shudder shouldn't still be happening.

- Anderson , IN, USA

The vehcile shifts hard from 1st to 2nd gear when it is newly started (regardless of the outside tempature).

- Hubert, NC, USA

There is a known issue with my truck, where the Transmission will all of a sudden lock up and then it shutters. The truck shakes violently and happens randomly. There is no rhyme or reason why this happens. Of course I'm barely over my warranty and Chevy in Austin states that it will be 3-5 days before they can review my truck. They won't provide a rental car or any help with a rental, so I'm expected to not have a car or figure out something myself to even have my truck looked at. My friend has GMC Canyon (same transmission) and had to have a level two mechanic replace his fluids. There are no warning lights or anything, this is a constant thing that is getting worse. There is a lawsuit in Canada for this issue that Chevy has known about and they haven't done anything about it.

- Austin, TX, USA

The rear end ring & Pinion bearings are effected. The rear end seems to be defective a high pitch noise is heard this started two weeks after purchase. It-??s been repaired twice and it is going back for a third time on 7-17-23 and it barely has 67,000 on it. The contact stated metal shavings were found in the LSD fluid in the rear end.

- Upton, WY, USA

The contact owns a 2020 Chevrolet Colorado. The contact stated that while driving at various speeds, the vehicle was experiencing a loss of power steering. The contact stated that the vehicle also lost motive power with unknown warning lights illuminated. The contact stated that the key was stuck in the ignition switch, and after several attempts, the contact was able to turn off and restart the vehicle. The vehicle was taken to a local dealer on several occasions however, the failure could not be duplicated. The vehicle was not repaired. The contact stated that the failure reoccurred and that while driving at an undisclosed speed, the vehicle was jerking and lost motive power. The vehicle was towed back to the dealer, where it was diagnosed that the transmission control module (TCM) needed to be replaced. The vehicle was repaired; however, the failure persisted, and the check engine and traction control warning lights were illuminated. The vehicle was towed back to the dealer, where it was diagnosed that the engine control module (ECM) needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The approximate failure mileage was 11,000.

- Hauppauge, NY, USA

Like the 2017-2019 Chevrolet Colorados my 2020 Colorado also has transmission shudders from time to time and I get random vibrations

- Hudson, WI, USA

The transmission on my 2020 Chevrolet Colorado often jerks when shifting and down shifting. This is especially true in colder temperatures where there is a significant hesitation and jerk when shifting from 1st gear to second gear. This is an automatic transmission. GM is aware of this issue and problem but are not resolving this problem as they indicated it should be acceptable. I have contacted both the dealer and GM. There have been no accidents related to this issue.

- Beulah, ND, USA

Vehicle is experiencing a shake and/or shudder during light throttle acceleration between 25 and 80 mph in a steady state of driving when the transmission is not actively shifting gears. The vehicle shudders as if I am driving on rumble strips. Tsb 18-na-355 shows same issue with 2017-2019 Colorados, but should probably include 2020 models as the condition is identical to what my vehicle is experiencing.

- Cordova, TN, USA

My new Chevy Colorado truck (10000 miles) has experienced vibration issued between 30-60 mph. Typically it happens when in cruise control between 50-60 mph and I transition from going downhill to uphill and the engine is starting to re-engage and accelerate to maintain speed. It feels like I am going over rumble strips and items in my glove box can be heard vibrating around. Apparently it is common enough that on the internet it is known as the "Chevy shake". I am worried about premature transmission failure. Also, if the internet is correct, Chevy has known about the problem since at least 2018. Also, if the internet is correct, Chevy has known about the problem since at least 2018. I have always it was the pavement conditions until I did some research online. I think I have really notices it within 3 months of purchase in May 2020.

- Pittsburgh, PA, USA

Front and rear axle locker failed to engage

- Hilliard, OH, USA

The vehicle is experiencing a shake and/or shudder during light throttle acceleration between 25 and 80 mph steady state driving when transmission is not actively shifting gears. The condition is as if I were driving over rumble strips. Tsb 18-na-355 addresses this issue in 2017 - 2019 Chevy Colorado pickup trucks with the 8 speed transmission. The 2020 model should be added as it does not appeared to be fixed at this time. I purchased this vehicle brand new from the factory with only 5 miles on it. The shudder issue has been persistent from the very first day I drove it.

- Lacey, WA, USA