Diagnostic Aids

WARNING: This page is about a different car, the 1999 Buick Regal and 1999 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The following conditions may cause an intermittent:

Intermittent open in circuit No. 917 (Black wire).
Poor connections at BCM or RCDLR.
Internal open in BCM.
Internal open in RCDLR.

BCM only checks for DTC B1003 when attempting to enable transmitter programming/diagnostic mode. See TRANSMITTER under PROGRAMMING.