G 1500 1/2 Ton Van V6-4.3L VIN W (1997)
Diagnostic Chart
Wiring Diagram
DIAGNOSTIC AIDS
The VCM has integrated circuits that are fault protected; therefore, if a circuit has failed, the integrated circuits may not be damaged. If this the case, the
IC will keep the circuit open until you have corrected the fault in the circuit. When you have corrected the fault, reinstall the VCM. Check the circuit.
Replace the VCM only if the circuit is still inoperative.
TEST DESCRIPTION