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Ron, ASE Certified Technician
Category: Chevy
Satisfied Customers: 35601
Experience:  35 years experience with ASE Certs
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Chevrolet Corvette LT1: I have a 1996 C4 standard. The HVAC

Customer Question

I have a 1996 C4 standard. The HVAC control (electronic) seems to be operating properly, but the air output kept getting slower and slower to shift between modes (dash, floor, defrost). I suspect a loss of vacuum to the HVAC system motors. I need a detail on the vacuum tubing system and a suggestion on where to look for a typical tube failure location.
Submitted: 2 years ago.
Category: Chevy
Expert:  Ron replied 2 years ago.
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
I have enclosed the vacuum diagram for the system in the link below, start first with making sure the vacuum supply line coming in from the vacuum storage reservoir is okay and not leaking and has a good connection to the engine vacuum. See the vacuum diagram in the first link and the routing in the second link. Copy and paste the links to your browser to open and view them.