2003 1500HD ac blower not working at all

bobo6026 · July 30, 2014

I have a 2003 1500HD that the AC/Heater blower is not working at all. In the past i have replaced the resistor when only the the lower speeds were working. At this point it will move cold ait if you are traveling at highway speed but other than that it seems that the fan will mot work. ANY HELP PLEASE??

gmtech4 · July 30, 2014

wrong forum ,they'll move it

chupe442 · July 30, 2014

Ohm out the resistor and the motor. If both are good, you are either not getting voltage too or from the control mod in the dash.

Good luck

Bob D · July 30, 2014

And also check voltage to fuse (w/ ignition on).

Could be ignition switch, but that typically also results in brake, ABS lights on.

gmtech4 · July 30, 2014

Alldata . Com for schematics and diagnostic strategy

ATMINF · July 31, 2014

Did you see if it was part of the recall they had on the AC control? I just took my truck in for the recall and the dealer fixed it in one day. No cost to me.