The fact that you are having blower motor AND headlight problems points to ignition switch failure. Power to both systems comes from the ignition switch and this is a common Grand Prix problem. Here's the fix: http://www.clubgp.com/newforum/tm.asp?m=20670
blower resistor
where to find heater resistor 2004
The 2005 Pontiac fan motor resistor is located on the back of the fan motor. The fan motor resistor is attached to the fan motor with two retaining screws.
i have an 03 grand prix and yes it was the blower motor resistor also check there is a fuse for fan low and fan high or something like that
I just had that same problem..I took it in to have it fixed and they replaced the blower motor resistor and that seems to have fixed the problem
the resistor is directly behind the blower motor under the dash
Resistor is located behind the blower motor assembly.
your speed sensor selection swith needs to be replaced on your dash
Most likely it is a fan motor that is pulling too much amperage. I'd start with the fan motor and/or the fan motor resistor.
I believe the Pontiac GS did.
yes it can, ohmm out the resistor in the key and install a resistor in the wiring this way any cut key will work.
blower motor resistor is bad