2017 GMC Acadia

Subject of the problem: Service brakes/Hydraulic brakes Problem of the vehicle: While driving, the brake pedal sometimes suddenly goes all the way down without resistance, and the vehicle does not slow down as expected. In order to regain brake pedal twice. Frequency of the problem: This issue occurs intermittently, but it poses a serious risk because the vehicle may not stop when needed. I already had the brake booster kit and hose replaced at an authorized GMC dealership because I was told this was the cause. However, the exact same problem continues to happen after the repair. Safety concern: This appears to be a defect that affects braking performance and safety. The issue occurs intermittently while driving (e.g., at stop lights, low-speed braking, or during normal driving). It has happed multiple times since the repair. This problem could cause loss of braking power and result in a crash. It is extremely dangerous and has not been resolved by the manufacturer's recommended repair. I have called the GMC service center at 18004678782 and 18002221020 with this problem. They told me that they could do nothing about it and to deal with the dealership directly myself and they can not do anything. I have talked to the dealership but they just tell me there was another problem other than the initial problem they told me. The dealership did the first checkup and that problem was not fixed. Then went in again because the same problem was happening so they did another checkup and told me there was another problem not the initial problem they told me. The second checkup they did, the part and labor was $2,700. I went in with the same problem and have to pay that much. The problem was not solved with the initial diagnosis they gave and now have pay extra ($2,700 - second checkup price) to fix the problem they did not fix. Thank you.

The contact owns a 2017 GMC Acadia. The contact stated that the vehicle had to be turned on and off approximately 2 - 3 times to place the gear shifter in park(P), for the transmission to remain in park(P). The message “Shift to Park” would be displayed on the instrument panel. The failure was intermittent at first, but since started occurring more frequently. The dealer was contacted, and it was confirmed that the VIN was not under recall. The vehicle was not diagnosed or repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 91,587.

Shift to park. Car will not register as in park. Have previously had issue fixed and has started again. Was told this is a common reoccurance and would likely happen again over time even if I pay to have it fixed again. Yesterday I spent 45 minutes trying to get the car to turn off. If it says shift to park the car will not shut completely down and there is nothing that can be done. I spoke with gmc for 30 min and was finally told to unhook the battery because they have no way to make it shut off without going to a dealership which was closed at the time.

The contact owns a 2017 GMC Acadia. The contact stated that while driving at an undisclosed speed, the transmission was slipping while attempting to change gears. There was no warning light illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 77,000.