Diagnostic Aids

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.

Any mode shift requested when the battery voltage is below 12 V may set this DTC.
Improperly connecting the cables during a jump start can cause C0896 07 to set.
The Transfer Case High/Low Clutch Reset procedure may need to be performed after repair.
EL-49742 harness is a good source for B+ and ground.
A key OFF, key ON cycle may be needed to enable mode shifting.