What 147 owners told NHTSA about the 2015 GMC Sierra 2500 Hd

Press the pedal feels soft vehicle slightly slows then pedal pressures up and truck instantly stops pedal stays hard for a long time having same issue on 15 tahoe

NHTSA ODI 11510446

The contact owns a 2015 GMC Sierra 1500. The contact stated her husband was driving when the vehicle in front of them applied the brakes unexpectedly, the driver depressed the brake pedal but failed to stop the vehicle due to the brake pedal being resistant/ rigid causing the vehicle to rear-end the other vehicle. The contact stated no warning light was illuminated. The air bags did not deploy. The contact stated no one was injured nor sought medical attention. A police report was filed. The driver was able to continue driving to their destination. The contact took the vehicle to the local dealer, where it was diagnosed that the vacuum pump had to be replaced. The dealer replaced the vacuum pump back in October of 2022. The vehicle was repaired but the second vacuum pump was also defective and the dealer replaced it on-site for a third time. The vehicle was repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 85,500. The contact stated that the failure speed was no more than 70 mph.

NHTSA ODI 11500249

Wife and daughter took the pickup to town. While returning home wife noticed a noise from the front end. She slowed down to turn and the whole tire with rotor came off the pickup causing the brake line to get ripped off and stating a fire. Damaged the running board and rocker panel along with the cv axle and other numerous parts.

NHTSA ODI 11458567

TL* THE CONTACT OWNS A 2015 GMC SIERRA 2500. WHILE THE VEHICLE WAS BEING REVERSED WITH A TRAILER ATTACHED, THE BRAKE PEDAL WAS DEPRESSED, BUT FAILED TO OPERATE. THE CONTACT STATED THAT THE TRAILER CRASHED INTO THE AWNING OF THE RESIDENCE. THERE WERE NO INJURIES. UPON INSPECTING THE VEHICLE, THE CONTACT NOTICED EVIDENCE OF BRAKE FLUID LEAKING FROM THE BRAKE BOOSTER, WHICH ALLOWED BRAKE FLUID TO ENTER THE CABIN OF THE VEHICLE. THE VEHICLE WAS TAKEN TO PERFORMANCE CHEVROLET (LOCATED AT 3222 BEVERLY PIKE, ELKINS, WV 26241, TEL: (304) 591-1077) TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE BRAKE BOOSTER WAS LEAKING AND WAS 1,000 MILES OUT OF WARRANTY. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT CONTACTED OR NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 37,023.

NHTSA ODI 11005111