1992 GMC VANDURA VENT WONT SWITCH FROM AC TO HEAT

  • Tiny
  • phestbech
  • 1992 GMC C2500
  • 150,000 miles

Need to know how to access vent to manually switch from ac to heat

Monday, October 31st, 2011 AT 12:52 AM

1 Answer

  • Tiny
  • hmac300
  • Expert
  • 41,713 posts

You have vacuum motors to switch these, check for avacuum leak most are under the dash i'm sending a vacuum diagram as that is all we have.

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Monday, October 31st, 2011 AT 6:47 PM

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