GM-GMC: 2003 gmc, check fuse, jumper wires

Question
Recently my heater fan stopped blowing. If i am driving down the highway I get heat circulating but not blowing. I was wondering if anyone had an idea as to the problem and a solution?

Answer
Jamie ,


First things first ,

Locate your fuse , drivers side panel area by firewall . Check fuse
If fuse is bad replace ,
Fuse Good:: Try taking down the blower and hook up direct to power with jumper wires .Fan does not work : replace fan blower motor

Fan blows:   Check the resistor block or power going to the relay . Normally the resistor block goes bad . The switch on the dash normally do not go bad this year

Let me know !!


Dave G