2016 GMC Yukon Denali

Closed preliminary evaluation · opened November 20, 2018 · closed April 10, 2022 · led to recall 19V645000

the brakes, the hydraulic brakes

On November 20, 2018, the Office of Defects Investigations (ODI) opened PE18-012 to investigate instances of sudden onset of a hard brake pedal that could result in extended stopping distance due to an issue with the brake assist vacuum pump in model year (MY) 2014 through 2016 GMC Sierra 1500 and Chevrolet Silverado 1500 series pickup trucks and MY 2015 through 2016 Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe, and GMC Yukon SUVs.If the brake assist vacuum pump fails to operate as intended, the amount of brake power assist supplied to the driver can be significantly reduced, extending the subject vehicle stopping distance. GM stated that the root cause of pump failures was due to foreign debris such as oil sludge in the engine oil. GM stated that this debris can become trapped by the oil inlet filter screen. Under normal operation, this screen allows a small amount of oil into the brake vacuum pump. The foreign debris can, over time, clog the pump which can cause a loss of lubrication and a reduction in the amount of vacuum produced leading to a hard pedal and extended stopping distance.On December 13, 2018, GM issued a Special Coverage (N182202780) for the brake vacuum pump issue in MY 2014-2017 trucks and 2015-2017 SUVs on the K2XX platform for 6 years or 72,000 miles. Special Coverage repair includes the replacement of the vacuum pump and vacuum pump belt. Consumers received notification of the coverage via mail. On September 6, 2019, GM notified NHTSA that it was conducting safety recall 19V-645 which reprograms the electronic brake control module (EBCM) and included approximately 3.5 million trucks and SUVs. In October 2019, GM extended the terms of special coverage N182202780 to 10 years or 150,000 miles as well as now including the entire scope of recall 19V-645. In October 2020, GM expanded the scope of coverage N182202780 to include the MY 2018 Escalade and 2019 Tahoe.The remedy implemented in GM recall 19V-645 appears to be sufficient in addressing the safety-related concerns of this issue. Loss of vacuum assist now occurs at a progressive rate as well as there being a more timely warning of a brake problem to the driver through the driver information center (DIC). In view of the recall action and revision to the special coverage, this Preliminary Evaluation is closed. The agency reserves the right to take additional action if warranted by new circumstances. The ODI reports cited above are available for review online at NHTSA.gov under the identification numbers in the attached document.

74,000 miles

The contact owns a 2016 GMC Yukon Denali. The contact stated that since owning the vehicle, the engine had failed on three separate occasions. The contact stated that prior to each failure, there was an abnormal rattling sound coming from the engine. The contact stated that the check engine warning light was illuminated on the instrument panel prior to the last two failures. The vehicle was taken to an independent mechanic after each failure, and the engine was replaced twice. Recently, the contact was informed that the catalytic converter needed to be replaced; however, the vehicle was not yet repaired. The manufacturer was notified of the failure, and the contact was informed that there …

NHTSA complaint 11658125, quoted in part. Filed by an owner and not verified by NHTSA or by us.

104,000 miles

The contact owns a 2016 GMC Yukon Denali. The contact stated that while driving 40 MPH, the contact was notified by another driver that the rear taillights were inoperable. No warning light was illuminated. Neither a dealer nor an independent mechanic was contacted, and the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact that there was no recall on the VIN related to the failure. The manufacturer was notified of the failure and opened a case and referred the contact to the NHTSA Hotline to report the failure. The approximate failure mileage was 104,000.

NHTSA complaint 11638321. Filed by an owner and not verified by NHTSA or by us.

65,000 miles

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.

NHTSA complaint 11621537. Filed by an owner and not verified by NHTSA or by us.

GPS IS NOT WORKING. ANTENNA

NHTSA complaint 11234014. Filed by an owner and not verified by NHTSA or by us.

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 …

NHTSA complaint 11230316, quoted in part. Filed by an owner and not verified by NHTSA or by us.

80,100 miles

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 …

NHTSA complaint 11221979, quoted in part. Filed by an owner and not verified by NHTSA or by us.