Diagnostic Aids

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 traction control system can be controlled by the operator in the following ways:

Through operation of the traction control switch.
Through programming of the traction control system automatic engagement feature.

Depending on the programmed state, the operation of the traction control system, as well as the operation of the traction off and low traction indicators, differs. For a more detailed explanation of these operational characteristics, refer to Traction Control Indicator Lamps in ABS Description & Operation .

Observe the data list parameters listed below in order to determine the status of the traction control system when it is unknown if the system is operational.

Traction Control Enabled
Traction Off Lamp Command

Press the traction control switch and observe the scan tool in order to verify a change in the status of the data list parameters.

Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to TESTING FOR INTERMITTENT & POOR CONNECTIONS , CONNECTOR REPAIRS , TESTING FOR ELECTRICAL INTERMITTENTS and WIRING REPAIRS .