Question about 2002 GMC Yukon XL

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I have a 2002 Yukon Denali XL. Athe AC has always worked very "true to temperature" until a few weeks ago. Now it blows cold all the time, even when the fan speed is on low, medium, or high. Could the interior sensor above the drivers head be malfunctioning?

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  • jvorehek Aug 03, 2010

    I accept the solution, but thought I could get an explanation on what the sensor above the driver actually does.

    Thanks,

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Hello, the AC in this truck is automatically controlled, the system has the ability to be tested for fault codes which will indicate which component is causing the problem, until this test is run by the dealer with a scanner you can only guess as to what the cause of this may be, have the diagnosis done.

Posted on Aug 03, 2010

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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
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2002 Cadillac Escalade, Escalade EXT
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