2018 Chevrolet Colorado electrical problems

Filed Jul 15, 2026 · Electrical · 60,000 miles · OH

The contact owns a 2018 Chevrolet Colorado. The contact stated that while the vehicle was parked, the key was difficult to remove from the ignition. The dealer was contacted and informed that the shift interlock switch failed to recognize that the transmission was shifted to park(P). The vehicle was not repaired. The manufacturer was contacted, but offered no assistance because the vehicle was not under warranty. The failure mileage was approximately 60,000.

Filed Jul 6, 2026 · Acceleration, Electrical · OR

My 2018 Chevrolet Colorado diesel has had repeated diesel emissions/DPF-related failures that cause the vehicle to enter reduced-power or limp mode. This is a safety issue because the truck suddenly loses power and cannot accelerate normally. The most serious incident occurred while driving over Santiam Pass in Oregon. The vehicle went into reduced-power/limp mode on a mountain highway, leaving me unable to maintain normal speed or accelerate safely. I lost power needed to pass traffic and had limited ability to respond to road conditions. The problem has happened several times. It has also occurred while I was towing my boat, which left me unable to continue the trip safely and created a hazardous situation because the truck could not maintain normal towing power. The issue appears related to the diesel particulate filter/emissions system and repeated DPF/regen or exhaust aftertreatment problems. I am concerned that a design, calibration, or emissions-system defect is causing sudden power reduction during normal driving and towing. This creates an unreasonable safety risk, especially on mountain passes, two-lane highways, and while towing. I am requesting that the federal safety agency review this as a potential safety defect involving the 2018 Chevrolet Colorado diesel DPF/emissions system and reduced-engine-power strategy. I am also requesting that this complaint be considered with any similar complaints, recalls, technical service bulletins, or emissions campaigns related to DPF regeneration, particulate matter sensor diagnostics, reduced engine power, or limp mode on the 2.8L Duramax Chevrolet Colorado.

Filed Oct 20, 2025 · Airbags, Electrical · FL

All the sensors seem to not be functioning correctly. Doesn't tell me the right measurements for the wheels, gas, over heating. Right front passenger door locks/unlocks when it wants. It chokes up when trying to accelerate. Theres a rattling noise that comes from under the car. First time I took it to the dealership, they stated it was a bolt that had come loose on the exhaust pipe. They placed a new one which lasted a year and a half and now its back to making the noise. I took it again to the dealership, this time they claimed they couldn't find anything. My airbag sensor keeps coming on constantly. My fuel sensor claims 116 miles one moments and 5 or 6 minutes later, it says I have 50 miles. My car was over heating and low on Anti-freeze, the car never notified it was over heating.

Filed Jun 11, 2025 · Electrical · 162,000 miles · PA

Odometer Fraud. The contact purchased a 2018 Chevrolet Colorado. The contact stated that while attempting to service the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was approximately 47,000 and at the time of registration, it was discovered that the mileage was 162,000.

Filed May 31, 2025 · Electrical · NY

Touch screen not responsive, apple carplay unavailable can’t connect phone, will randomly tap apps and puts calls on hold. Will flip pages on its own and even turn the back up camera on when driving down the road

Filed May 8, 2025 · Electrical, Engine · GA

P2738 Pressure Control Solenoid Valve 6 Control Circuit Low Voltage. Whenever you drive, the transmission will go into limp mode every now and then. It will say low oil pressure and throw another code of P0700 MIL Request From TCM. This is a common issue that I have researched and would like to know a way forward. I've only had the vehicle for 6 months. Within city limits as long as you don't push the accelerator too much (50mph within 2 minutes) it runs ok until the vehicle comes to a stop. Also, when you get on and off of the freeway, same issues make it go into limp mode in which you will have to shut the truck off and start up after a few minutes to reset.

Filed Apr 12, 2025 · Electrical, Steering · NC

The ignition switch will frequently lock when turning off and not allow the electrical system to fully turn off and prevent you from removing the key. It happens randomly but has been increasing in frequency.

Filed Jan 24, 2025 · Airbags, Electrical · CA

Key can't be removed when the truck is in park. Locks go up and down when vehicle is moving. Transmission stuck in 3rd gear. Stabilitrack and traction control indicator lights appear on dashboard. Exhaust brake and traction control switches don't work.

Filed Jul 29, 2024 · Electrical · MI

Key cannot be removed front ignition. Put in park but does not release key . Unlocks doors but does not lock steering wheel or release key . Have to do several tricks to get key loose . No one in repair community seems to be able to fix or understand how to repair.

Filed May 16, 2024 · Electrical, Engine · NC

“Service trailer brake system” won’t turn over but will crank Transmission shifting very hard around 3rd and 4th gear