GM Service Manual Online
For 1990-2009 cars only

Problem

Action

A faulty fuse.

    • Determine and correct cause of the malfunction.
    •  Refer to HVAC Blower Controls System Check .

A faulty blower motor resistor.

    • Determine and correct cause of the malfunction.
    •  Refer to HVAC Blower Controls System Check .

A faulty fan controller switch.

    • Determine and correct cause of the malfunction.
    •  Refer to HVAC Blower Controls System Check .

A faulty blower motor and/or wiring.

    • Determine and correct cause of the malfunction.
    •  Refer to HVAC Blower Controls System Check .