2005 GMC Sierra Im a curious mechanic

2005 GMC SIERRA
Avatar
BIGDOG030308
  • MEMBER
  • 1 POST
Heater problem
2005 GMC Sierra V8 Four Wheel Drive Automatic
----------------------------------------------------------------
When I go to turn on my a/c or heater nothing comes out. Nothing blows. All my fuses are good. What could be wrong with my truck?
Sep 13, 2008 at 11:48 PM
Advertisement
Avatar
2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
Could be the blower motor or maybe the fan speed resistor. Use a test light to see if you have power at the blower motor (under pass side of dash) If you do adn no blower, themotor is probably bad. If it doesnt, go to the resistor next to the motor and see if it is giving power out and if it has power in.
Sep 14, 2008 at 12:37 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.