1997 GMC SIERRA BLOWER FAN NOT WORKING.

  • Tiny
  • Royhobbs
  • 1997 GMC SIERRA

Heater problem
1997 GMC Sierra V8 Four Wheel Drive Automatic 180000 miles

No air coming out when fan switch is turned to any setting. Tried replacing the fuse (in cab) but didn't work. Owner's manual says there is also a underhood blower fuse/relay which I haven't replaced yet. Was working just fine yesterday and have had no problems with it before. Thanks for the assistance.

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Friday, December 11th, 2009 AT 6:39 PM

4 Replies

  • Tiny
  • Bluelightnin6
  • EXPERT
  • 17,053 POSTS

First check blower motor relay as your manual states. If OK then check your heater control switches. If they are OK as well then suspect faulty blower motor.

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Friday, December 11th, 2009 AT 6:48 PM
  • Tiny
  • Royhobbs
  • MEMBER

Thanks, I'll try the other fuse but I currently don't have a service manual for this vehicle so not sure how to check the heater switches.

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Friday, December 11th, 2009 AT 7:07 PM
  • Tiny
  • Bluelightnin6
  • EXPERT
  • 17,053 POSTS

Your blower motor relay is located on top of the front A/C-heater blower housing, in dash.
follow the link here to get an idea of how to test the blower motor relay..

http://www.2carpros.com/how_to/how_do_i_check_a_relay.htm

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Friday, December 11th, 2009 AT 7:10 PM
  • Tiny
  • Royhobbs
  • MEMBER

Thanks for the help, turned out to be the blower motor after all.

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Saturday, December 12th, 2009 AT 10:54 PM

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