My 2004 GMC Sierra has a driver and passenger a/c temp. control switch. The passenger side switch light wasnt working when I bought the truck but wasnt really concerned with it. A few months later, the a/c blower selector wouldnt work on #1 so I would have to have it on #2 for it to blow any air out and now #2 dont work either. Any suggestions on what to do?

 

More than likely your blower resistor is bad. There is a service bulletin on them and GM sells an upgraded resistor and a new harness that needs to be spliced in. I did one not to long ago and it was super easy and fixed me right up. It took about 30 minutes for the entire job. Hope this helps!

 

Thanks alot. I will look in to that as soon as possible. Is it expensive?

 

It was under $100 for the resistor and the new pigtail.