Conditions for Setting the DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Condition 1

The 4WD low switch is not in 4WD low, open/12 volts.
The Transfer Case Ratio is 2.64-2.9 for 2 seconds.
Both conditions must be met twice.

Condition 2

The 4WD low switch is in 4WD low.
The Transfer Case Ratio is 0.8-1.75 for 2 seconds.