2016 GMC YUKON DENALI Power Train Problems

The contact owns a 2016 GMC Yukon Denali. The contact stated while driving at various speeds, the transmission was slipping between gear. The vehicle was taken to the dealer; however, the failure could not be duplicated. The dealer replaced the transmission fluid twice; however, the failure recurred. The vehicle was taken to the dealer, where it was determined that the transmission wiring harness had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 65,000.

AT LESS THAN 3 YEARS OLD AND 60K MILES, THE FOLLOWING HAS OCCURRED AT DIFFERENT TIMES UP UNTIL NOW: OVERALL ELECTRICAL MALFUNCTION INCLUDING DISPLAY ILLUMINATION FAILURE (DISPLAY GOES COMPLETELY BLACK AND/OR DIM WHILE DRIVING - CANNOT SEE SPEEDOMETER ETC. THIS HAS HAPPENED MULTIPLE TIMES WHILE DRIVING ON BOTH THE HIGHWAY AND SURFACE STREETS, INCLUDING DAYTIME AND NIGHTTIME), AUDIO/ENTERTAINMENT SYSTEM GLITCHES (RADIO VOLUME CHANGES TO AND GETS STUCK RANDOMLY ON HIGHEST VOLUME SETTING (WAS NEVER EVEN SET TO THIS LEVEL) WHILE DRIVING, CAUSING SUDDEN DISTRACTION/DISRUPTION), TAIL LIGHT MALFUNCTION (INTERMITTENTLY STOPS WORKING BOTH LEFT AND RIGHT SIDES), AND NOW THE MOTOR TO THE SUNROOF HAS DIED (OCCURRED WHILE DRIVING AND AT A MOMENT WHEN IT WAS NECESSARY TO CLOSE FOR SAFETY ON THE HIGHWAY.) THE TRANSMISSION IS DEFECTIVE (FOR THE SECOND TIME - OFF SHIFTS AND DOWNSHIFTS UNEXPECTEDLY WHILE DRIVING AT BOTH LOWER AND HIGHER SPEEDS. HAS HAPPENED ON THE HIGHWAY REQUIRING...

I HAVE ONLY OWNED THIS CAR SINCE 3/29/19 AND SEVERAL TIMES NOW MY YUKON'S CHECK ENGINE LIGHT HAS CAME ON AFTER THE TRANSMISSION BUCKS, JUMPS OR JERKS HARD, NOT SURE WHAT TO CALL IT BUT IT BUCKED OR SHOVED MY CAR FORWARD WHEN TRYING TO SLOW DOWN OR STOP (NOT PRESSING GAS PEDAL). THIS COULD BE DANGEROUS AS IT INTERFERES WITH TRYING TO STOP THE VEHICLE. IT WAS SUCH A HARD JOLT THAT IT FOR A MINUTE I THOUGHT ANOTHER CAR REAR ENDED ME. THIS HAS HAPPENED AT LEAST TWICE AFTER I PRESSED THE BRAKE TO BEGIN SLOWING DOWN AS I WAS PREPARING TO PULL INTO A PARKING LOT, I WAS PROBABLY GOING AROUND 20MPH. IT ALSO HAPPENED TWICE WHILE ACCELERATING ONTO A ROAD, PROBABLY GOING 35 MPH AND JUST FELT A JOLT LIKE SOMETHING KICKED MY CAR FORWARD SUDDENLY. I'VE BEEN TOLD THAT THE JERKING PROBLEM IS RELATED TO...

SINCE THE DAY I PURCHASED THIS 2016 GMC YUKON XL DENALI THERE HAS BEEN A VIBRATION IN WHAT I THINK IS THE PASSENGER REAR END. I'VE TAKEN IT IN 3 TIMES AND EACH TIME THE DEALER AND THE GM REPRESENTATIVE SAY IT IS "WITHIN SPEC." THIS PROBLEM HAS PERSISTED. THE VEHICLE IS NOW ALMOST UN-DRIVABLE DUE TO THE SHAKING. IT AFFECTS THE STEERING WHEEL AT ALL SPEEDS. THIS HAPPENS AT ALL SPEEDS ON ALL TERRAINS. THIS HAPPENS WHEN THE VEHICLE IS COLD AS WELL AS WARM/HOT. THE VEHICLE WILL SOMETIMES JERK TO THE LEFT OR RIGHT WHEN THE SHAKING GETS REAL BAD. THIS VEHICLE IS BECOMING DANGEROUS TO DRIVE BUT I HAVE TO USE IT. I AM NOT THE ONLY ONE WITH THIS ISSUE AND WOULD APPRECIATE SOME HELP.