Buick Regal: Diagnostic Information and Procedures

 Cooling Fan Always On (Dual Fan)

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. Diagnostic Procedure Instructions provides an overview of each diagnostic category. Circuit/System De

 DTC P0729-P0735, P076F, or P07D9

Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis An overview of each diagnostic category can be found here: Refer to