Buick Regal: Diagnostic Information and Procedures

 DTC B1025-B1135 (UQ3 without NKC)

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Refer to Diagnostic Procedure Instructions for an overview of each diagnostic category. DTC Descripto

 SIR Service Precautions

WARNING: If a service procedure indicates that a module is to be replaced, a new production unit MUST be ordered from the GM Parts Catalog or certified supplier. Using a module that has been reset by a 3rd party company is strictly prohibited. Not using a new production unit may result in improper