NHTSA Owner Complaint Log
This page lists owner-reported complaints filed with NHTSA for the 2026 Cadillac CT5. Complaints are unverified consumer reports submitted to NHTSA and do not by themselves prove a defect or defect rate.
Catastrophic engine failure within 700 miles Requires full engine replacement Problems began around 150 miles on odometer Message: Reduced accelerated speed Check engine light Service transmission system Service variable valve timing system
The contact owns a 2026 Cadillac CT5. The contact stated that while driving the vehicle with the Super Cruise feature activated, the message indicated a road construction zone, and the brakes independently activated. The contact stated that there was no road construction nearby. The contact reset the super cruise control feature. The contact stated that while the super cruise control was set at 75 MPH, the vehicle unintendedly accelerated to 100 MPH within seconds. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The dealer was made aware of the failure; however, the contact was awaiting scheduling information. The manufacturer was made aware of the failure, and a case was filed. The contact was advised to cease using the cruise control feature until the vehicle was inspected by the dealer. The failure mileage was approximately 1,200.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.