Question about 2002 Pontiac Grand Prix

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Heater fan controls

No fan speed on 1234 only 5th setting

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  • rmcmillan1 Jul 24, 2008

    I also have the exact same problem.

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You most likely need to replace the blower motor resistor. Two of my grand prix vehicles had the same problem. HI speed bypasses the resistor...which is why it still works. Speeds 1-4 go through the resistor. It's not too big a deal to change on my cars if you're small, can stand on your head and dislocate your should to get to it. (It's located next to the firewall on the passenger side.) Resistors for my car run around $30. Good luck.

Posted on Jul 28, 2008

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