1997 gmc sonoma Air only comes to the windshield sand floor. No air comes thru dash vents.

Asked by Steven Jan 15, 2014 at 08:46 PM about the 1997 GMC Sonoma 2 Dr SLS Sport Extended Cab SB

Question type: Maintenance & Repair

4 Answers
44,705

tuff4x4 answered 10 years ago

You have a vacuum leak from under the hood inside to the heater box. Look for a black vacuum line that runs inside the firewall to heater box from the engine. You will find a crack in it somewhere.

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