Table 1 shows one common engine and engine cooling related problems of the 2026 Chevrolet Colorado.
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling problems |
Component: drivetrain, brake, and engine management systems repeatedly fail in a coordinated pattern, with multiple warning indicators activating simultaneously and sudden unintended deceleration occurring without warning. Vehicle available for inspection. Safety risk: most recent failure occurred at highway speed with family including passengers in the vehicle. Without warning, the vehicle decelerated abruptly while multiple dashboard warnings activated at once. Sudden deceleration at highway speed creates immediate risk of rear-end collision from following traffic and loss of vehicle control. Prior dealer confirmation: yes. Curry Chevrolet (scarsdale, NY) has had the vehicle in service for the same defect category on multiple prior occasions, including stays of over a week on at least two visits. The dealer has not permanently resolved the issue — symptoms have now recurred at sixth time. An additional early service visit at the same dealer was not documented with a repair order; I retain contemporaneous text messages establishing that visit occurred. Other inspections: inspected only by curry Chevrolet to date. Gm customer assistance engaged (case #xxx). No police, insurance, or independent inspections. New case has been filed with gm, linked to the previous (case #xxx). Next service visit will be at a different authorized Chevrolet dealer for an independent diagnostic. Warning indicators: yes. In the most recent incident, multiple warning lamps and system alerts activated simultaneously at the moment of deceleration, with no advance warning. Prior incidents showed the same multi-system warning pattern, consistently without predictive indicators. Vehicle is a 2026 Chevrolet Colorado, VIN [xxx], delivered January 2026 with 2,209 miles on the odometer at delivery. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).
Ecm engine control module tcm transmission range sensor tcm transmission control module while driving in a 45 mph speed zone in heavy traffic, the vehicle suddenly lost power and abruptly slowed down causing a number of other vehicles to have to break and swerve . Problem confirmed through onstar diagnosis as of this date, the gm dealer has not confirmed the problem. No other inspections have been confirmed. There were no warnings prior to the event.