Diagnostic Aids

Always begin diagnosis with first DTC listed on scan tool. Perform a visual inspection for loose or poor connections at all related components. If DTC B1003 is a history DTC, fault may be intermittent. See DIAGNOSING INTERMITTENTS  .

Fig 1: Identifying Remote Control Door Lock Receiver Connector Terminals

Courtesy of GENERAL MOTORS CORP.

Fig 2: Identifying Body Control Module 24-Pin Pink Connector C1

Courtesy of GENERAL MOTORS CORP.