Conditions for Setting the DTC
WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
One of the following conditions occur:
- The four-wheel drive low circuit is closed, grounded, for more than 7 seconds with a transfer case ratio of 0.95-1.05:1, for 1 occurrence.
- The four-wheel drive low circuit is open for 2 seconds, with a transfer case ratio of 2.65-2.76:1 in two different commanded gears, for 2 occurrences.