Question about 2002 GMC Yukon Denali

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2002 GMC Yukon front A/C blowing warm air

I've checked the system pressure in the A/C and it's fine, also the rear A/C blows cold like it should, but my front A/C blows only warm air..the fans work like they should I'm just not getting any cold air. Any help would be great. I look forward to your answers!!

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Posted on Aug 27, 2009

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I think your temp sensor in the roof panel has gone bad like mine. If I turn the temp wy up or down I get response but I think a fan died in this sensor a while back. looking for a replacement now.

Posted on Jun 13, 2009

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Here is a TSB (Technical Service Bulletin) for your vehicle for loss of temp control.
File In Section: 01 - HVAC
Bulletin No.: 01-01-39-007
TECHNICAL
Subject:
Loss Of HVAC System Mode and/or Temperature Control 

(Reroute Wiring Harness)
Models
1999-2002 Chevrolet and GMC C/K Pickup Models (Silverado and Sierra) 1999-2002 Chevrolet and GMC C/K Utility Models (Avalanche, Suburban, Tahoe, Yukon, Yukon XL, Denali) 2001 GMC Sierra C3
2002 GMC Sierra Denali
2002 Cadillac Escalade, Escalade EXT
Some customers may comment that they cannot control the HVAC system modes and/or the temperature. These concerns may be intermittent.
Cause
There may be poor terminal contact and/or bent terminals in connectors C206 (RPO C68 automatic HVAC controls) or C296 (RPO C60 manual HVAC controls). Excessive tension on the wires due to the wiring harness being miss routed in the instrument panel carrier may cause these conditions.

If the warranty campaign is over i am sure they can or may have in the system on how to correct the problem.
Good luck and hope this helps, keep me posted if you need help on to the repair procedure.


Posted on May 26, 2009

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Posted on Jan 02, 2017

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