2017 GMC YUKON DENALI Power Train Problems

The contact owns a 2017 GMC Yukon Denali. The contact stated that while driving at undisclosed speeds, the vehicle started bouncing. The contact stated that the transmission also failed to shift properly. The service engine and suspension warning lights were illuminated. The vehicle was taken to the dealer, and the contact was informed that a bearing had detached, and the transmission had failed. The vehicle was repaired; however, the failure recurred. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 89,400.

SHUDDER UNDER LIGHT, CONSTANT ACCELERATION AT 35MPH TO 55MPH, RPM UNDER 1,500. UPHILL GRADE IT IS ACCENTUATED. SHUDDER OCCURS FOR 1 SECOND ACROSS WHOLE VEHICLE, REOCCURS EVERY FEW SECONDS AT A CONSTANT INTERVAL. SEEMS TO BE SAME ISSUE WITH ALL 8L90 TRANSMISSIONS FROM GM/CHEVY/CADI.