2015 GMC SIERRA DENALI Complaints

The contact owns a 2015 GMC Sierra 2500 Denali. The contact stated that while driving at 65 MPH, the vehicle lost motive power with the “Engine Power Failure” warning light illuminated. The vehicle was towed to the residence. The vehicle was later towed to an independent mechanic, where it was diagnosed and determined that the fuel system had failed and there were metal shavings in the fuel system. The contact was informed that the fuel system needed to be replaced. The vehicle was not repaired. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The approximate failure mileage was 160,000.

The contact owns a 2015 GMC Sierra 1500 Denali. The contact stated that while shifting the vehicle from park(P) to drive(D), the vehicle hesitated and then jerked into gear. The contact stated that the entire vehicle was shaking when it jerked into gear. The contact stated that the failure was also occurred while shifting the vehicle into reverse(R). Additionally, the failure occurred while slowing down for a traffic signal. The contact stated that the failure was a constant. The contact stated she had not noticed any warning lights during the failure. The contact had taken the vehicle to a local dealer who advised the contact that there were no open recalls for the transmission on the VIN. The vehicle was not diagnosed. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was unknown.

4 MONTHS AGO THE DISPLAY PORTRAYED A MESSAGE STATING, TRAILER BRAKE WARNING, HAVE SYSTEM CHECKED. SINCE THAT TIME I HAVE ATTEMPTED ON NUMEROUS TO HAVE MY VEHICLE CHECKED. BUT AS OF THIS DATE I HAVE NOT BEEN TO HAVE ANY DEALERSHIP LOOK AT MY VEHICLE. I HAVE BEEN TOLD BY DEALERSHIP THAT THE VEHICLE COMPUTER SHOWS A HISTORY BUT NO CURRENT ERROR CODES, AND THEY CAN NOT WORK ON VEHICLE UNTIL IT HAS CURRENT CODES. SO I HAVE A TRUCK THAT IS DESIGNED TO TOW CARGO/VEHICLE BUT I AM NOT ABLE TO USE MY TRUCK FOR THAT PURPOSE BECAUSE OF THIS WARNING MESSAGE. I HAVE CONTACTED DEALERSHIPS, CUSTOMER SERVICE WITH GMC AND EVEN FILED A COMPLAINT WITH TENNESSEE DEPT OF CONSUMER AFFAIRS, BUT NO ONE WANTS TO HELP WITH MY PROBLEM. I HAVE NOTICED ON THE INTERNET THAT I AM NOT THE ONLY ONE WITH THIS ISSUE. DANGEROUS SITUATION SHOULD SOMEONE USE VEHICLE TOWING. BIGGEST PROBLEM GM DOES NOT WANT TO EVEN ACKNOWLEDGE THAT THEY HAVE A PROBLEM.

AC BLOWS HOT AIR QONT GOLD FREON FOR LONGER THEN WEEK AND HALF AND IS BACK TO HOT AIR..LEAD TO BELIEVE ITS THE AC CONDENSER HAS FAILED

I WAS BACKING UP AT VERY LOW SPEED THE BRAKE PEDAL GOT VERY HARD AND THE VEHICLE ACTED LIKE IT DID NOT WANT TO STOP I HAD TO KEEP PUSHING EXTREMELY HARD ON TO THE BREAK TO GET THE VEHICLE TO STOP I TRIED IT AGAIN IN DRIVE AND THE VEHICLE DID THIS EXACT SAME THING THIS TIME I NOTICED AFTER PAYING PARTICULAR ATTENTION THAT THE BRAKES WHILE THEY WERE HARD TO PRESS WERE PULSATING SO I HAD TO USE EXTREME LEG PRESSURE TO STOP THE VEHICLE. MY TRUCK HAS ALREADY HAD THE RECALL FOR THE SAME ISSUE EARLIER THIS YEAR. WHEN THIS 1ST HAPPENED IT ALMOST CAUSED ME TO WRECK INTO A FENCE

TRANSMISSION IS NOT ABLE TO BE FIXED. THREE REPAIRS AND GM CAN'T FIX. TRANSMISSION JERKS, SLIPS, CLUNKS. UNCOMFORABLE TO DRIVE. I AM STUCK WITH SUBPAR VEHICLE. GM HAS BEEN HORRIBLE TO WORK WITH. 17 RECALLS? WHY CANT GM MAKE A SOLID RELIABLE VEHICLE AFTER 100 YEARS IN BUSINESS?

HARD BRAKE PEDAL WITH INCREASED EFFORT NEEDED TO DEPRESS THE BRAKE PEDAL. FEELS LIKE TRUCK WILL NOT STOP. HAD TO HAVE TRUCK TOWED. REPORTED BACK ON 11-24-18 TO NHTSA: ( #1115347). BRAKE VACUUM PUMP WAS REPLACED @ GM DEALER ON 11-14-18, SAME SITUATION HAPPENED AGAIN ON 02-19-19. GM TSB # PIT5361D NEEDS TO BE A RECALL.

WHEN COMING TO A STOP, APPLYING A STEADY AMOUNT OF BRAKE PRESSURE THE TRANSMISSION SHIFTS AND LOSES ALL FORMS OF ENGINE BRAKING CAUSING THE TRUCK TO SPEED UP AND OVERSHOOTS THE STOPSIGN.

POOR BRAKE PERFORMANCE. THE BRAKE PEDAL GETS STIFF AT A LOW SPEED AND CAUSES THE TRUCK TO NOT BRAKE COMPLETELY

FAILURE OF THE BELT DRIVEN VACUUM PUMP WHILE DRIVING CAUSING VERY HARD BRAKING AND ALMOST CAUSED AN ACCIDENT. VACUUM PRESSURE DROPPED OFF AND CAUSED THE PEDAL TO BECOME FIRM. LUCKILY AFTER IT WAS INSPECTED FOR REPAIR THERE WASN'T OIL CONTAMINATION IN THE VACUUM LINE OR BRAKE BOOSTER SO THOSE DID NOT HAVE TO BE REPLACED.