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. 1132 (Purple wire) or No. 1037 (Light Green wire), poor connections at BCM, PCM or splice pack SP205, or internal open in BCM. BCM may store DTC U1255 if certain diagnostics are performed between PCM and DLC.