2020 Chevrolet Colorado

This has been an ongoing issue. Truck currently has 45,000 miles on it. When driving on the interstate for 30 minutes, transmission flutters causing the cab to shake. It feels like running over rumble strips. Flutter lasts for several seconds and gets worse (longer duration, harder flutter) as time goes on. Dealer won't diagnose it because no codes are recorded. No dash lights light. The only indication is the flutter itself. Chevrolet cust support says their hands are tied - it is the dealers responsibility. The dealer will not devote personnel for 30 minutes to replicate the issue. Issue comes out of no where startling the driver - not safe. Your first reaction is either to brake or gas to stop the flutter/shake. Flutter is stronger as time goes by. This issue has been identified for other years of the same vehicle, and several GM vehicles. It is still an issue in 2020, but not recognized by GM. Multiple complaints are on the internet for this issue by other 2020 Colorado owners.

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.

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

IGNITION LOCKED UP. This situation is the same as another complaint posted earlier this year by another owner. Ignition key will not turn in the igntion switch. Tried all the internet fixes. Turning steering wheel, bumping transmission lever, tried spare key, etc. Nothing worked. $225 to tow to the dealer. Still waiting to hear from back from dealer.

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.

The contact owns a 2020 Chevrolet Colorado. The contact stated that while driving at various speeds and accelerating, the vehicle started shaking abnormally. The vehicle was taken to a local dealer to be diagnosed. The contact was informed that the abnormal shaking was caused by the torque converter. The dealer flushed the transmission; however, the failure has persisted. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 40,000.

Check engine light appeared when starting vehicle. Code read by local auto parts store. Thermostat failed at less than 50k miles, causing fan to run constantly and for an extended period time after turning engine off, despite outside temperature. Causes potential for overheating due to not reading temperature. Thermostats are rated to last 100k miles. Is not covered under Chevrolet's 5 years/100k miles powertrain warranty. Upon research, this has been an extremely common issue for Colorado trucks for many years and has not been addressed by Chevrolet. Many blogs are available online. This vehicle was a certified vehicle bought just over 1 years ago and would not be fixed by any warranty according to the dealership purchased from (Bob Fisher).

Within the last 2 months, I have had momentary steering problems at low speed. They continue to become worse with time, no longer safe to drive. Dealer has vehicle now and informs me that it will cost $3000 for a known/existing corrosion of electrical connections in the power steering assembly. Via the internet, the steering gear torque sensor cover assembly needs to be replaced. Because this cover assembly has leaked, the wiring harness also has to be replaced. 7 hours of labor, front end alignment, etc! The loss of power steering in a turn has nearly caused several accidents till I got it home. Dealer confirms what I experienced in test drive, internet has many examples of same problem and solution. There are no warnings of impending loss of control, one minute everything is fine, the next you are fighting for control.

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.