2004 GMC Sierra Only cools passenger side

2004 GMC SIERRA
35,000 MILES • V8 • 2WD • AUTOMATIC
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WLDBIL1
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My wife's 2004 GMC Sierra 1500 has started cooling only on the passenger side no matter what the temp sliders are set at. Is this an actuator switch, how much is this and is it difficult to replace ?
May 4, 2009 at 4:41 PM
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DOCFIXIT
  • ✓ASE Certified Mechanic
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Hi
What HVAC do you have Manual or Automatic?
Does air flow out all vents driver side and pass side?
Let me know
Thanks for donate
May 5, 2009 at 9:08 AM
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WLDBIL1
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The 2004 Sierra 1500 is automatic and air comes out of all vents but is only cool onthe passengers side.
May 5, 2009 at 12:36 PM
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DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Automatic air you need a scan tool to test. Find a local shop the specializes in AC repair and get a diagnosis. Could be one of four temp sensors or blend door motor etc. System a bit complex.
May 5, 2009 at 1:01 PM
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