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2005 GMC Sierra HVAC system

Tiny
MARNATI
  • MEMBER
  • 2005 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 74,000 MILES
Air only blows through defrost vent. A/C works fine.
Tuesday, July 13th, 2010 AT 12:08 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Need to know if Automatic or Manual A/C. What needs to be done is system needs to be diagnosed with Scan Tool. Air flow controled by computer via actuator motors faul maybe in motor or sensor or limit switch.
Hope this helps
Thanks for donate
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Tuesday, July 13th, 2010 AT 1:33 PM
Tiny
MARNATI
  • MEMBER
  • 2 POSTS
Had truck looked at and had the system "re-booted" seems to be working like new now. Thanks for help. Inexpensive fix!
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+1
Wednesday, July 14th, 2010 AT 9:35 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Glad to hear thought that might be needed cause you said A/C worked fine just only defrost.
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Wednesday, July 14th, 2010 AT 3:10 PM

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