Diagnostic Aids
WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
- If the DTC B2588 is a history DTC, the fault may be intermittent. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems.
- The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to battery positive voltage in the park lamp relay coil control circuit.
- The park lamp relay coil is shorted to battery positive voltage.
- The BCM is shorted to battery positive voltage.