Diagnostic Aids

Disconnecting modules and turning ignition switch to RUN position, may cause DTCs to set. Check for DTCs in each module after completion of required repairs.

Fig 1: Identifying Powertrain Control Module Harness Connector Terminals

Courtesy of GENERAL MOTORS CORP.

Fig 2: Identifying Sensing Diagnostic Module Harness Connector Terminals

Courtesy of GENERAL MOTORS CORP.

Fig 3: Identifying Electronic Brake Control Module Harness Connector Terminals

Courtesy of GENERAL MOTORS CORP.