Body Control System: Overview Chevrolet Silverado 2500

Test Description

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

1. 4) - This step tests for battery voltage on the signal circuits that are not required.
2. 5) - This step tests for no battery voltage on the required signal circuits.
3. 6) - If any ignition switch parameters that should be inactive in the present ignition switch position are active, 2 ignition switch signal circuits may be shorted together.
4. 7) - This step eliminates open circuits as the cause of the malfunction.

Scheme 1

Scheme 2

Scheme 3

Scheme 4

1. Disconnect the negative battery cable(s).
2. Remove the knee bolster. Refer to «KNEE BOLSTER REPLACEMENT (NON-LUXURY)»(ref-176702-S04396270132005051000000) or «KNEE BOLSTER REPLACEMENT (LUXURY)»(ref-176702-S17859846442005051000000) .
3. Disconnect the brown connector.
4. Disconnect all other connectors (1).
5. Remove the BCM from the sliding bracket.