GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

The body control module (BCM) controls the PASS-Key® II theft deterrent system. Refer to Body Control System Circuit Description in Body Control System.

Diagnostic Trouble Codes (DTCs)

The following DTCs may be set by the BCM. The DTCs are related to the PASS-Key® II:

    •  DTC B2957 PASS-Key Data Shorted to Ground
    •  DTC B2958 PASS-Key Data Open/Shorted to Battery
    •  DTC B2960 PASS-Key Data Incorrect
    •  DTC B2961 Key In Ignition Circuit Malfunction
    •  DTC B3031 Passlock Controller in Learn Mode

Refer to Scan Tool Diagnostics