Ron21

I have a 2003 Grand AM 4 cyc. I am having a problem with the heater fan. When set to 1,2 or 3 it doesn't work. However in set to 4 or 5 it works fine.

Any idea what the problem is?

thanks in advance

xeroinfinity

Sounds like your blows resistor has gone bad, try this link.

Blower Motor & Resistor Removal - 99+ Grand Am

Hope that helps!

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1999 Grand Am SS 3.4 OHV

Ron21

Thanks for the help. That was the problem!!