Driver assistanceElectricalFuel system
Filed Jul 6, 2026
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 NHTSA 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.
- NHTSA ID
- 11748528
- Incident
- Jul 7, 2025
BrakesDriver assistance
Filed Dec 28, 2024
The Stibilitrack in the truck went out just after 20 minutes of driving in 34 degree rainy weather at 65 mph. Found out that it was the passenger front bearing reluctor had chipped away, which is what the wheel speed sensor reads. Once one those go out, you lose Stibilitrack and ABS. I believe that this is a significant safety issue, and a poorly engineered/designed system. The rear system reads gear which is what should be in the front should have as well, not a "magnetic ring". This should be fixed so that noone gets injured or killed. It's also a waste of consumer money that you have to change out an entire wheel bearing hub assembly to fix the issue. Shame on the company. In the photos, notice that half the black ring (the reluctor) is missing.
- NHTSA ID
- 11632897
- Incident
- Dec 19, 2024
Driver assistancePowertrain (other)
Filed Apr 8, 2023
I have a 2018 Colorado 4x4 with 51K miles. Purchased with 28k. When driving at normal highway speed, get drive train shudder when increase torque is needed (hill, ramp, etc.). Only happens in overdrive. When tow/haul is activated shudder does not occur. It feels like transmission and/or drive shaft is about to fall off. I have not attempted repair due to numerous concerns voiced on this site and class action lawsuit now in progress. No warning lights or messages.
- NHTSA ID
- 11516117
- Incident
- Jan 4, 2023
Driver assistanceElectrical
Filed May 27, 2022
The wiring harness was touching the air condenser line. The line gets hot when air conditioning is used. It melted causing my truck to throw a lot of random alarms. It also would turn my cruise off and make it down shift all of a sudden startling me. Melted wires are also a fire hazard. There is a bulletin for wire harness chafing that GMC knows about this issue. If it had melted something major and shut my truck down while driving down the interstate it would put me and anybody around me in danger. It was wired back together but is still not fixed. Might need a new wiring harness.
- NHTSA ID
- 11466441
- Incident
- May 24, 2022
Driver assistanceElectricalSuspension
Filed Jul 24, 2021
El vehículo en muchas ocasiones no quiere encender el tablero, se vuelve loco como si quisiera apagar ah blim, queda mucho ah, las luces del tablero y la radio se encienden y apagan
- NHTSA ID
- 11426276
- Incident
- Jul 1, 2021
Driver assistanceEnginePowertrain (other)
Filed Dec 5, 2020
ABOUT A YEAR AGO, I STARTED GETTING A SLIGHT SHUDDER IN MY TRANSMISSION SO I TOOK IT TO THE DEALER FOR REPAIR. THEY COULDN'T GET IT TO SHUDDER. SEVERAL TIMES I'LL BE DRIVING DOWN THE ROAD AT OR AROUND 45MPH AND THE TRUCK WILL START SHUDDERING SO BAD I FEEL LIKE I HAVE TO PULL OFF THE ROAD. EVERY TIME I TAKE IT TO THE DEALER FOR REPAIR I END UP LOSING MY TRUCK FOR A DAY AND THEY TELL ME THEY CAN FIND ANYTHING WRONG EVEN THOUGH THIS IS A KNOWN ISSUE AND THERE IS A TSB OUT TO FIX THE ISSUE.
- NHTSA ID
- 11378045
- Incident
- Dec 2, 2020
- Mileage
- 44,000 mi
Driver assistanceEngineFuel system
Filed Aug 16, 2019
THE TORQUER CONVERTER ITS THE PROBLEM I FIND OUT A DAY ON HIGHWAY I WAS DRIVING AND THE TRUCK LOSE POWER IT TAKES TIME TO MOVE TO OTHER GEAR AND MAKE A WEIRD SOUND I TAKE THE TRUCK TO THE CHEVY DEALER AND THEY JUST FLUSH THE TRANSMISSION FLUID AND THEY SAID WILL FIX THE PROBLEM BUT AFTER THAT GET IT WORSE IT CLAPS WHEN PUT IT IN REVERSE OR DRIVE IT USE TO SHAKES WHEN YOU DRIVING EVEN AT NOT HIGH SPEED. THE PROBLEM IS NOT SOLVE AND THE GUY FROM THE DEALER TOLD ME GMC WILL NOT LET THEM CHANGE THE PART IS HIS OWN WORDS. HE SAID YOU HAVE A GOOD WARRANTY DON'T WORRY BUT I NEED SOLUTION AND THE DEALER DOESN'T SHOW ANY INTEREST TO FIX MY TRUCK PROBLEM, I HAVE TO RENT A CAR APPARENTLY WAS COVER FOR MY INSURANCE BUT A WEEK LATER THEY CALL ME BECAUSE THEY HAVE A ISSUE WITH THE CAR I RENT AND JUST RENTED FOR 24 HOURS. IS WHY I'M DOING THIS COMPLAINT TO FIND SOMEONE CAN HELP ME AND FINALLY MY TRUCK GET FIX.
- NHTSA ID
- 11244539
- Incident
- Aug 5, 2019
- Mileage
- 5,000 mi
Driver assistanceElectricalSteering
Filed Jul 8, 2019
I JUST LEFT WORK, MY TRUCK WAS PARKED FOR 8, HRS. AFTER 3, MINUTES OF DRIVING THE SERVICE STABILITY TRACK LIGHT CAME ON. AFTER A COUPLE MINS. I TURNED DOWN A MAJOR HIGHWAY AND THEN THE FOLLOWING WARNING LIGHTS CAME ON: CHECK ENGINE, LOW FUEL ( IT WAS HALF FULL), TRACTION CONTROL, DRIVE WITH CAUTION, STREARING ASSIST OFF. THE ELECTRICAL PANEL WENT CRAZY AND I LOST POWER TO THE ENGINE. I PULLED OVER AND CALLED CHEVY ROADSIDE ASSIST. THEY TOWED THE TRUCK TO COX CHEVROLET, WHERE I PURCHASED THE VEHICLE BRAND NEW ONLY A YEAR AGO. THEY COULD NOT DUPLICATE THE ISSUE AND I HAD TO DRIVE IT BACK HOME. THIS IS CLEARLY A MALFUNCTION. I DO NOT FEEL SAFE DRIVING THE IT.
- NHTSA ID
- 11230291
- Incident
- Jul 5, 2019
- Mileage
- 23,000 mi
Body & structureDriver assistance
Filed Feb 26, 2018
TL* THE CONTACT OWNS A 2018 CHEVROLET COLORADO. WHILE DRIVING VARIOUS LOW SPEEDS AT NIGHT, THE BACK UP CAMERA MONITOR BECAME TOO BRIGHT FOR THE CONTACT TO SEE PROPERLY WHILE REVERSING THE VEHICLE. IN ADDITION, AT NIGHT, THE BACK UP CAMERA ILLUMINATED THE CABIN OF THE VEHICLE AND THE CONTACT COULD NOT SEE THE ROAD. HIDAY MOTORS IN BLUFFTON, INDIANA WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 1.
- NHTSA ID
- 11075018
- Incident
- Nov 30, 2017
- Mileage
- 1 mi
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.