Question about 1999 GMC Safari
After having the transmission rebuilt on my 99 safari the AC vent selection control no longer diverts the airflow to your feet or dash vents it stays stuck on the defrost vents. is it possible qa vacuum line has been dislodged when the transmission was removed for repair?
They are controlled by vacuum ... a line must have been disconnected or broken when the trans was replaced. Remove the dog house and look for a small vacuum line broken or pulled apart.
Posted on Jul 28, 2010
Testimonial: "thanks i thought maybe this is what happened"
NOPE- Replace the 3 way check valve in your accessory vacuum line. Easy $5 fix!
Posted on Oct 10, 2011
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Posted on Jan 02, 2017
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