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Re: ac/heat won't switch modes, blows through all vents?
Sorry, I meant to edit my thread to add 3.5, but the server must have been busy yesterday.
I checked the vacuum and did find a piece missing on the vacuum line in the engine compartment next to the battery. funny that GM would run it under the battery tray. the exposed vacuum line is dry and brittle and cracked. used some electrical tape and it now works great.
thanks, Eric
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