2004 envoy no air comes out dash vents

5

Asked by Feb 09, 2014 at 02:00 PM about the 2004 GMC Envoy XL SLE 4WD

Question type: General

1 Answer

79,265

If the air only comes out of the defrost outlets check for a disconnected vacuum hose on the intake manifold. When the system loses vacuum it defaults to the defrost position for safety reasons. HTH. -Jim

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