2021 Chevrolet Colorado Transmission and drivetrain Problems

“In May 2025, I took my truck to the dealership due to a severe whining noise from the rear. They said the rear differential had failed and needed a full replacement, costing me $1,800 since the warranty didn’t cover the entire amount. By late September 2026, while driving on the highway, the whining returned—this time with vibrations under my feet whenever I accelerated. Back at the dealership, I was told the rear differential had failed again. …”

“While driving on the parkway, the engine revved, and then the brakes became hard as a brick. The truck was unable to be stopped. There were no warning lamps or indications there was a problem, it happened suddenly and immediately. Other drivers' and my own safety was at risk because I could not stop the truck. Here is the diagnosis from the GM service center where it was towed to: After the removal of the valve cover, the tech found the pump in pieces, and the end of the exhaust camshaft was damaged, as presented in the photos. …”

“I purchased a brand new Colorado earlier this year. The vehicle currently has about 9,000 miles on the odometer. On two recent occasions within 1 1/2 weeks of each other while driving at highway speeds, there was a clunk noise and the transmission acted as if it had been shifted into neutral. The truck would not accelerate, and the RPMs were very high as I was pushing the accelerator and the vehicle was not responding but the engine was revving. …”

“I have 2021 Chevy Colorado pickup truck. Put the truck in park and unable to turn off and remove the key. This is the third time this has happened this week . The first two times I moved the shifter from park to drive and back and it released. The last time I had to sit in my drive way for twenty minutes with the truck running before I could turn the key to shut off the truck. This is a very dangerous situation if there was every an emergency and not being able the shut off the truck.”

“I have taken my vehicle into the shop twice for an issue with the transmission. The first time they did a software update on the vehicle. They said that that would fix the issue. The vehicle was working fine for a week I took the vehicle back to the shop because it was making a clunking noise again when I put it in reverse. I recorded the incident of the clunking noise and I provided it to the service manager. They kept the vehicle for two days and stated that they were unable to replicate the issue. …”