2026 GMC Acadia problems

“The contact owned a 2026 GMC Acadia. The contact stated that there were software updates perform on the vehicle and the vehicle experienced issues with a module failure with reading the information downloaded. The vehicle was taken to the dealer, where technicians restarted and successfully corrected the module for that specific update. However, a much larger software update failed to download or update properly. The manufacturer was notified of the failure. The dealer was notified of the failure. The contact stated that there have been many failures with the software updates. The dealer confirm the failure and the repair was pending. The failure mileage was 900.”

“Vehicle ran out of fuel and became disabled in an active roadway/exit ramp. The vehicle retained 12-volt electrical power and the dashboard and electronic controls remained operational. With the brake pedal depressed and the ignition/electrical system on, I attempted to shift the transmission from Park to Neutral so the vehicle could be pushed out of traffic. The vehicle repeatedly displayed “Conditions Not Correct for Shift” and remained locked in Park because the engine was not running. There appears to be no driver-accessible mechanical/manual override that allows the transmission to be placed in Neutral when the engine cannot run. As a result, a disabled vehicle with functioning electrical power can remain physically immobilized in a live traffic lane, creating a collision hazard and preventing occupants or bystanders from moving it to a safer location. This condition could occur not only from running out of fuel but potentially from any engine failure that prevents the engine from running. I believe the inability to place a disabled vehicle into Neutral under these circumstances presents a safety hazard.”

“The contact owns a 2026 GMC Acadia. The contact stated that while at a stop sign and depressing the brake pedal, the vehicle unintendedly accelerated and crashed into the rear passenger's side of a Semi Truck. Both the AEB and the IAEB failed to engage during the incident. The vehicle sustained severe front-end damage. The contact stated that the air bags failed to deploy, and the Forward Collision Avoidance System failed to engage to prevent the crash. The driver sustained a neck and right shoulder injury. The front passenger seat occupant sustained a right arm and left leg injury, and a headache. No medical treatment was received. A police report was filed. The vehicle was towed away. The cause of the failure was not yet determined. The manufacturer was notified of the failure. The failure mileage was 4,700.”

“Purchased NEW 2026 GMC Acadia on XXX XXX - Fastened seat belts, Started vehicle in a driveway, Switched into forward gear and Vehicle lurched forward while Depressing the brake with no braking action occurring (BRAKE PEDAL WENT TO THE FLOOR). Shut off engine and depressed the Emergency Brake Button to stop the vehicle. Vehicle struck another vehicle upon stopping causing several thousand dollars damage. XXX - Notified [XXX]/[XXX] the dealer, no help. Called GM and filed a Case #XXX. Vehicle inspected by GM on XXX. No response forthcoming from GM or the dealer yet after 6 weeks since the incident. XXX - Called for a wrecker to have vehicle towed to the dealer where it was purchased. While awaiting the tow truck I completed a video of damage to both vehicles, before starting the vehicle (first time after the accident) the brake pedal was depressed and traveled to the floor. Started vehicle and brakes regained some braking ability to drive onto a roll back tow truck and delivery to the dealership above. Fortunately, this brake failure happened in a private driveway and not within a busy intersection where major injuries likely would have occurred. STILL WAITING ON GENERAL MOTORS!!”

“Blind spot monitor goes off for everything. Engine has chirping noise. Brand new”