Buick Regal: Diagnostic Information and Procedures

 DTC C1436

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

 Air Vents

Use the slider knob on the air vent louvers to change the amount and direction of the airflow. To close the outboard air vents, move the slider knob to the full outboard position. To close the center air vents, move the slide knob to the full inboard position. To close the rear passenger air vent