2001 GMC Yukon Climate control module

2001 GMC YUKON
172,000 MILES • 4.3L • V8 • 2WD • AUTOMATIC
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RENDOT
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  • 1 POST
Air only come out of dash vents. Temp control works as set.
Jan 15, 2015 at 8:57 AM
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HMAC300
  • CAR REPAIR CONTRIBUTOR
  • 48,601 POSTS
check for a vacuum leak one of the vacuum motors for mode is probably not working or there is a leak in vacuum line.
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Jan 15, 2015 at 9:28 AM
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WRENCHTECH
  • CAR REPAIR CONTRIBUTOR
  • 20,761 POSTS
Not sure where that diagram came from HMAC but the mode actuators on this truck are electric. https://www.2carpros.com/images/external/91360274.gif
Jan 15, 2015 at 9:53 AM
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