Condition 2

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The 4WD low switch is not in 4WD low.
The transfer case is in 4WD low.
The TCC is commanded ON.
The TCC slip speed is 100 to 3,000 RPM.
The transfer case ratio is 2.5-2.9.
All conditions are met for 10 seconds.