Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 6 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.
- Key ON, engine OFF.
- Connect a scan tool.
- Parking brake engaged. Transmission in Neutral.
- Using the Transfer Case Lock function of the Special Function feature of the scan tool, command the transfer case lock ON and OFF. You should be able to hear the encoder motor lock engage and disengage.