Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

2) - This step tests the transfer case electrical control of the indicator control circuits.
3) - This step helps determine module failures.
4) - This step tests the affected indicator control circuit for an open or high resistance.
5) - This step tests the ignition 1 voltage circuit for an open or short to ground.

Fig 1: Transfer Case Shift Control Switch Indicator Inoperative - One or More Diagnosis

Courtesy of GENERAL MOTORS CORP.