GM Program #N172081900 Transfer Case Actuator Motor Sticks
March 6, 2017
Certain 2017 model year Cadillac Escalade, Chevrolet Silverado LD and Tahoe, and GMC Sierra LD and Yukon vehicles equipped with an automatic transfer c vehicles equipped with an automatic transfer case (RPO NQ6), may have a condition in which the transfer case actuator motor brake sticks in the open positionase (RPO NQH), and Chevrolet Colorado and Suburban, and GMC Canyon inside the transfer case actuator assembly. If 1) the actuator motor brake sticks open, 2) the vehicle is on surface with angle greater than 0 but less than 2 degrees, 3) the vehicle is parked in 4LO, 4) the system is warm, and 5) the vehicle ignition is turned “Off,” there is potential for vehicle rollback due to the range fork slipping into neutral. The brake sticking condition will set diagnostic trouble code C0326 58 and a “Service AWD” warning will appear on the driver information center.
2017 GMC Canyon Denali