2023 Chevrolet Colorado

My 2023 Chevrolet Colorado (2.7L, approx. 49,000 miles) experiences sudden, intermittent loss of motive power involving the 8-speed automatic transmission. The transmission sets codes and the vehicle drops into limp mode, capped at roughly 45 mph, without warning. The most dangerous symptom is a total loss of acceleration from a stop, especially on inclines — pressing the accelerator produces no response. On one occasion, stopped on a slight incline, the vehicle rolled backward toward the car behind me when it failed to move forward on accelerator input. I narrowly avoided a collision. On a separate occasion, after pressing the accelerator with no response, the vehicle then suddenly lurched forward into cross traffic; repeated presses produced inconsistent, delayed engagement, nearly causing a collision. To climb inclines I now have to hold the brake while applying throttle and slowly release the brake to prevent rollback. These are unpredictable loss-of-control events that create a serious crash risk in traffic. I believe this relates to a known issue affecting the GM 8-speed automatic transmission. The vehicle is currently at a GM dealer and I have an open GM Customer Care case. No crash, fire, or injury has occurred yet, but two near-collisions have.

The upper radiator hose and gasket on numerous Colorado and Canyon trucks have failed prematurely. Mine has failed at 31k miles. Radiator hose leaks can cause engine overheating and failures while on roadways. Additional issues of leaking coolant on roadways and into the environment. Vehicle is scheduled to be viewed by dealership. Symptom which lead to diagnosing problems included rushing fluid sounds as air was introduced to the coolant line as well as an observable leak on the driver side where the radiator hose connects to the radiator.

Vehicle: 2023 Chevrolet Colorado Crew Cab 4WD, VIN: [XXX] , mileage: 52,877. Recurrent failure in the cooling system and engine/transmission, affecting safety and use. Check Engine Light comes on and off intermittently, code P30C5 (Coolant Flow Low). The coolant pump was replaced under warranty on March 20, 2025, at Leson Chevrolet (Harvey, LA) with 26,621 miles (attached invoice), but the same issue persists 9 months later with "Engine and Transmission System" alert in myChevrolet app. This is the 5th failed repair for the same defect since purchase (August 2023). Previous repairs include transmission wiring/sensor (January 2024) and Traction Control/ABS (December 2023). The vehicle is unsafe for daily 100-mile commute. Request investigation for potential recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

COMPONENT FAILURE: Body Control Module causing systematic electrical failures: door locks, power windows, window regulators, four-wheel drive transfer case display. Components intact, available for inspection. SAFETY RISK: Door locks malfunction preventing emergency exit. Power windows fail affecting communication/egress. 4WD display fault (yellow AUTO vs white) indicates transfer case control issues affecting traction in mountain winter driving at 10,000ft elevation. Unpredictable electrical failures create safety risk during remote travel. DEALER CONFIRMATION: Approximately 20 dealer visits. Each time: scan codes, test drive, "no fault found." Problem temporarily clears via battery disconnect/reconnect, proving electrical fault not mechanical. Dealer cannot diagnose root cause, hasn't performed systematic electrical testing. MANUFACTURER INSPECTION: None despite repeated failures. WARNING SYMPTOMS: Intermittent: door ajar warnings, power window/lock failures, 4WD indicator yellow, various warning lights. All symptoms simultaneously resolve after battery disconnect/reconnect, indicating BCM or power distribution fault. Pattern repeats with increasing frequency. CRITICAL: Research shows multiple 2023 Colorado owners report identical patterns - intermittent multi-system failures resolving via battery reset. Indicates systematic 2023 model year defect, likely BCM firmware/hardware issue. Problem occurs unpredictably, clears during dealer transport. Request GM engineering data logging during normal operation.

The contact owns a 2023 Chevrolet Colorado. The contact stated while driving 35 MPH, the vehicle seemed to operate in 4WD mode; however, the instrument cluster stated that the vehicle was operating in 2WD mode. Additionally, the check engine warning light illuminated. The vehicle was taken to the dealer, where the check engine warning light was cleared. The contact also stated that while at a complete stop, the Auto START/STOP feature turned off the engine; however, upon depressing the accelerator pedal, the vehicle failed to respond, and the engine made abnormal grinding sounds. The vehicle then accelerated to 40 MPH and then slammed on the brakes unintendedly, nearly causing a crash. The contact depressed the accelerator pedal, but the vehicle failed to respond. The contact continually depressed the accelerator pedal, and the vehicle lurched forward and jerked while responding. The contact was able to pull into a parking lot. The vehicle was towed to the second dealer, Malloy Chevrolet (2700 Valley Ave, Winchester, VA 22601) where the failure recurred. The vehicle was being diagnosed. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 600. The VIN was unavailable.