2026 Cadillac CT5-V problems

“CRITICAL SAFETY SYSTEM FAILURE & CONCEALED SOFTWARE REPAIR: Within 14 days of vehicle delivery, a 2026 Cadillac CT5 experienced a complete failure of its heavily advertised Reverse Automatic Braking (RAB) driver-assistance technology. While reversing at a safe, low speed toward a full-sized stationary vehicle, the system failed to detect the obstacle, issued zero visual/audible warnings, and failed to apply automatic braking, resulting in an unmitigated collision ($2,800 physical damage). SUBSEQUENT OEM CONCEALMENT & SOFTWARE FLASH: The vehicle was taken to an authorized dealership (Wallace Cadillac). While in dealer custody, onboard vehicle logs confirm that GM Update 661.10 was flashed to the vehicle's modules on June 8th. GM Corporate and the dealership subsequently claimed no repairs or updates were performed, stating the system tested "fully functional" on June 13th (after the undisclosed software patch was applied). GM Executive Management (Case #103080717 / PAC Case #101155599) has repeatedly refused to provide written diagnostic findings or supply the owner with the Event Data Recorder (EDR) telemetry logs as requested under the Driver Privacy Act of…”

“Component/system involved: Electronic Parking Brake (EPB) system and EPB control switch on my Cadillac CT5-V Blackwing. The vehicle and component are currently available for inspection. What happened / safety risk: The vehicle experienced an unattended roll-away and struck a tree, causing significant vehicle damage. No one was injured, but the vehicle’s uncontrolled movement created a risk of serious injury or property damage. Reproducibility: After the incident, I discovered that I can reproduce a behavior in which the electronic parking brake is released and, if I actuate the EPB switch again shortly afterward to reapply the parking brake, the vehicle sometimes does not respond to that second input. The parking brake remains released and the expected parking-brake indication does not appear. If I wait longer and actuate the switch again, the parking brake applies normally. I have video showing this behavior. The issue has not yet been evaluated or confirmed by a Cadillac dealer. Inspections: The vehicle has been inspected in connection with the collision/insurance claim, but the EPB behavior has not yet been evaluated by Cadillac/GM or an independent service…”

“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”

“Adaptive Cruise control acts like it’s going to maintain a gap (user selectable gap distance is able to be manipulated and displayed on drivers information center) but will rush right onto a preceding cars bumper. I’m told that even though manual transmission cars have the components and illusion that adaptive cruise control works, it doesn’t which is bad if you think it will work. Please make adaptive cruise control work in manual transmission CT5s like it does in auto. Similarly, the Surround Video Recorder equipment is installed but doesn’t record and isn’t viewable. Please make that function as well. Again, all of the hardware is there - implement it!”