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Home >> GMC >> 1999 >> Envoy >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Modules >> System Tests >> BCM Diagnostic System Check >> Notes

BCM Diagnostic System Check: Notes

NOTE: Use of Tech 2 scan tool is recommended to perform system check. Follow scan tool manufacturer's instructions.
NOTE: Use this check as the starting point for any BCM complaint. Most malfunctions are caused by faulty wiring, connectors or components. Disconnect module harness connectors in specified order, or BCM/TBC related DTCs will set.
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