Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
Condition 1
Transfer case four wheel drive switch indicates high range and the calculated transfer case range is low for 5 seconds.
Condition 2
Transfer case four wheel drive switch indicates low range and the calculated transfer case range is high for 5 seconds.