Help no heat only defrost

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by challutz, Feb 12, 2007.

  1. challutz

    challutz New Member

    ive got a 2004 LT 1500 suburban Im not getting any air blowing to the floor the only thing i have is defrost even when the floor option is selected nothing through the upper vents either seems to be stuck on defrost. Is there a relay switch that may have gone bad??? Im new to the electronic HVAC system so I dont know where to start but i did check all the fuses and they were ok any help greatly appreciated. thanx charlie

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