Question about 2004 GMC Envoy

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2004 GMC Envoy; Very little air flow from FRONT PANEL

Hello, on my 2004 GMC Envoy there is very little air coming from the front four vents. This is the case even if the fan is at maximum level. When in DEFROST mode, I can feel the air coming from the vents near the windshield, and the side window vents (on both sides), but when changing the mode to FRONT vent, I can barely feel the air coming out of the front four vents.

thanks in advance on any advise.

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Try replacing the cabin air filter.

Posted on Mar 12, 2009

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Check the vacume the one comes from the intake many fold through the the fire wall to central vacuum unti some it burns from heat of the of the engine, or maybe you have a plugged cabin filter

Posted on Jul 07, 2013

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I had a similar issue. Air would only blow out of defrost vents after I replaced my battery. But this worked for me:

1) Unplug HVAC fuse for 10-30 seconds
2) Start truck
3) A/C comes out defrost - wait about 10 to 15 secs
4) A/C then starts coming out the floor vents for about 5 seconds
5) A/C then starts coming out the dash vents.
6) While the A/C is coming out the dash vents, turn A/C OFF (otherwise it cycles back to defrost for good).
7) Turn truck OFF
8) Restart truck and it should work fine

(Found solution on another forum from user "ccurran")

Posted on Mar 07, 2012

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