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Home >> Buick >> 1997 >> Century Custom >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnosis & Repair >> DTC U1255, Loss Of Class 2 Serial Data Fault (General) >> Diagnostic Aids

Diagnostic Aids

The following conditions may cause an intermittent: Intermittent open in circuit No. 1132 (Purple wire) or No. 1037 (Light Green wire); poor connections; or internal open in BCM. BCM may store DTC U1255 if certain diagnostics are performed between PCM and Data Link Connector (DLC).