2020 Chevrolet Colorado

Vacuum pump seized, causing loss of power assist on brakes. This happened as I was approaching an intersection to make a right-hand turn. When I press down on the brake pedal it felt hard, like it was locked up. After pressing down on it with both feet, I was able to slow the vehicle down enough to turn out of the intersection. If this event happened when there was another vehicle in the intersection or approaching the intersection on the side street that I was turning onto, it would have led to a collision. Not being able to slow down adequately, I had to swing wide in the turn. This incident happened at a relatively slow speed. If it had happened at highway speeds it could have been catastrophic. There was no warning light prior to the incident the check engine light did not come on until after the incident. The Pump seizure caused the connecting coupling between the exhaust cam and pump to shatter. The damage was extended to the exhaust cam and valve cover and leaving metal fragments in the engine. The local Chevrolet dealer has given me an estimate for the repair of over 2400

While driving at any speed when steering wheel is at the 1 to 2 o' clock position on a right turn, steering wheel wobbles and regardless of road condition. Stabitrack warning light comes on occasionally.

Plastic fuel supply line leaked from front of fuel tank area . the vehicle (2020 chevrolet colorado) was towed to the chevrolet service facility, after it was discovered leaking on my driveway. Gas was smelled while I was driving. I do have the failed hose. It was indeed damaged. Possibly chewed through by a rodent, mouse or squirrel. The colorado is allways parked in my blacktop driveway. Safety risk is substantial gas leak without any warning while driving or in a garage potential fire or explosion. Dealer service confirmed and replaced the hose. I reported to Chevrolet by phone on (4/30/2026).I was told report started & put in system. No warning light or alarm occured.

The contact owns a 2020 Chevrolet Colorado. The contact stated that while driving at an undisclosed speed, the brake pedal went to the floorboard while depressed, and the vehicle failed to stop immediately. The contact switched to manual driving mode and downshifted the transmission. The vehicle came to a stop after driving over a dirt pile. The brake warning light was illuminated. The vehicle was able to drive to the residence. Upon inspection, the contact discovered that the hydraulic line was rubbing against the parking brake cable. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 102,400.

the power brake booster was found broken on 1/29/2026. Through repairs, i've found vacuum pump race being completely damaged and exhaust camshaft end that linked with vacuum pump is also damaged.

The contact owns a 2020 Chevrolet Colorado. The contact stated that while operating the vehicle, the check engine warning light remained illuminated. The vehicle was taken to an independent mechanic, who diagnosed the vehicle with camshaft position sensor failure. The contact was informed that the camshaft position sensor needed to be replaced. The vehicle was not repaired. The local dealer and manufacturer were notified of the failure, but no assistance was provided. The contact was informed that the VIN was not under a Manufacturer Extended Warranty coverage related to the failure. The failure mileage was 119,000.

While driving in grocery store parking lot. The brake booster completely failed with no notice almost causing me to hit someone. I had to throw the truck in park while moving to avoid hitting pedestrians. The brake pedal is completely compressed to the floor as I was stomping the brakes in an attempt to stop. Had I not thought quick enough I would of hit at least 2 people.

The contact owns a 2020 Chevrolet Colorado. The contact stated that the air bag warning had been turning off and on intermittently for almost 2 years. The vehicle was taken to the dealer several times, but the dealer was unable to duplicate the failure. The vehicle was recently taken to an independent mechanic; however, the vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 26,000.

My truck has been shuddering and when put into gear it sounds like the bottom is falling out of it. Now when I am driving my truck is shuddering very hard and skipping gears. I have been having this issue since I bought the truck with only 47k miles and I have only put 40k miles on this truck in the past 3 years that I have owned it. I keep the maintenance up on my truck and have since I’ve owned it and I have already put a complaint into GM, when I bought the truck it has had electrical issues and the dealership is not helping. My warranty is out on this truck and GM said there is nothing they can do to help with my transmission or electrical problems. This truck has not even hit 100k and I’m so upset that I am having these many problems and no one is wanting to help, they just want my money. I can’t afford an attorney or I would sue this dealership for selling me a Lemon and for GM knowing about there faulty transmission in my year truck and not standing behind it!

Had transmission serviced, was told the transmission was no good and about to fail Quoted $8000.00 dollars to repair

Vehicle has 54,250 miles. Vehicle has a rear differential bearing going out by hearing and feeling the grinding at all speeds and the transmission jerks shafting gears. Both could cause an accident if totally fail. Chevrolet has a service bulletin out from what my local garage says. Mechanic also says Chevrolet will not warranty the product. Vehicle is now being looked at by a Chevrolet dealer. The vehicle is OUT OF WARRANTY. My son, who is [XXX] and not familiar with vehicles thought it was the tires causing the whining and vibration. Took the vehicle in several times to Chevy and they ignored the issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The vehicle experienced a sudden and progressive transmission failure during normal driving conditions. Symptoms included harsh shifting, delayed engagement, loss of power transfer, and eventual inability to reliably propel the vehicle. The failure created a safety risk due to unexpected loss of acceleration and unpredictable drivetrain behavior while in traffic. The transmission issue was not the result of improper maintenance. The vehicle was maintained according to manufacturer recommendations. The condition worsened over time and ultimately required dealer inspection. A dealership inspected the vehicle and attributed the failure to a transmission defect, characterizing it as a maintenance issue despite no evidence of neglect. The transmission and related components remain available for inspection upon request. No warning lights provided adequate advance notice prior to the functional failure. The issue occurred without driver misuse and under ordinary driving conditions.

Torque converter shudder. Had dealer do the recommended flush which cost $800 and still has same issue.

The contact owns a 2020 Chevrolet Colorado. The contact stated that while accelerating, the vehicle vibrated and shook abnormally, as if driven over ripples on the roadway. No warning lights were illuminated. The vehicle was taken to the dealer, and the tires were balanced. The contact picked up the vehicle and stated that the failure persisted. The vehicle was taken back to the dealer, where it was diagnosed that the transmission oil failed to heat up as intended, and condensation had built up in the transmission. The dealer added Mobil 1 transmission oil to heat up the oil and remove the condensation. The contact was informed by the dealer that the vehicle needed to be driven between 200 and 400 miles to remove the condensation. The manufacturer was made aware of the failure and filed a claim and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 80,000.

Defective Torque Converter at estimated 92k miles even after following all preventive maintenance schedule.

Transmission shuttering mostly at interstate speeds but as slow as 35 mph. Under light to medium light pedal acceleration. Truck feels as if it's going over Road ripples. I'm disappointed to find out this is a common problem with Chevy 8-speed Transmissions. It happens every time I drive it. From time to time it'll shake the truck a little violently

The component that failed is the camshaft position actuator. My check engine light came on. Had my vvt solenoids replaced and the mechanic told me the actuator needs replacing. GM has issued a special bulletin to fix this part for the same year make and model as my truck but my vin doesn’t meet the criteria. I have only owned this vehicle for 8 months.

This vehicle suffers from a torque converter/transmission shudder after the transfer mission fluid heats up. My initial complaint to the selling dealer and they did not follow the GM posted procedure and initially charged me for the service. I’ve changed dealerships and I’ve been told it the temporary fix is to do a flush and there is no permanent fix by GM. I have had situations where and unexperienced driver would have definitely got into a car accident and I don’t let anybody drive my car because I believe it is unsafe. So far the dealer has been accommodating while under warranty but advised I reach out to GM who then advised to review my documents I file an NHTSA complaint. What occurs when the vehicle is not in warranty and the vehicle continues to shudder. I have included the service bulletin and repair invoices.

Unknown. When my truck reaches a certain speed it is jumping or missing, it feels like a brake is sticking but I’m told it is a problem with my transmission, torque converter, going bad. It is getting worse. It cuts the power down on the vehicle. If I can go faster than 60 it doesn’t do it.

Vehicle began exhibiting an intermittent shake between 45-60 MPH which felt like driving on a wash board road. In addition it would shift hard/bog down between 1st and 2nd gear. Took to a dealer for service and was told a TSB had been issued to flush the transmission, this was performed. Condition returned within months and after multiple additional visits where the dealer claimed they couldn't replicate the issue they finally determined the torque converter needed to be replaced at approximately 70,874 miles. By this time the warranty had expired (60,000 mile warranty) and I was told I would have to pay for it.