Diagnostic Aids
WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Transmission Range Switch Logic for valid combinations of switch signal circuits A, B, C and Parity. In the Transmission Range Switch Logic table, HI indicates an ignition voltage signal and LOW indicates a zero voltage signal.