Question about 2002 Pontiac Grand Prix
No fan speed on 1234 only 5th setting
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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Posted on Jan 02, 2017
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