air conditioning will not blow out dash vents, it switches on its own and blows out the defroster
Jul 5, 2008 at 1:14 AM
Advertisement
2CARPRO JACK
✓Experienced Mechanic
11,533 POSTS
Check the source vacuum under the hood, should be a small black plastic line that goes from the engine to teh interior, it enters the truck at the HVAC plenum box on the pass side