vacuum for Heater/AC controls - Chevy Impala SS Forum
 
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post #1 of 2 (permalink) Old 07-06-2015, 06:17 AM Thread Starter
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vacuum for Heater/AC controls

On my 95SS, on the right side of the intake, and more than halfway back there's a small vacuum port that looks it connects to a small bore vacuum tube that disappears with a bundle of wires and it's probably for the HVAC controls inside my car. I had been noticing when shutting the car off a sound like released vacuum and looking at the design on my 95 RMW, that same vacuum line has a small check valve near the intake. The line on my 95 SS doesn't. The guy that repaired my motor buggared up a lot of things, and I noticed this line was twisted weird (he might have broken it) - isn't there supposed to be a check valve on the HVAC line, or maybe it doesn't matter? Anyone know the part number or on the parts CD where to find it??

'95 DGM Impala SS, 383, LT4 cnc heads, LT4 matched intake, Holley 58 mm t/body, GM 846 cam, GMPP 1.5 rr's, F-body MAF, BH OBD I PCM, LT4 knock module, K&N cold air, Edelbrock headers, Flowmaster exhaust, BBHP #73 6-speed, 4:10 gear, sloted and drilled rotors, Z28 cluster.

'96 Buick Roadmaster Limited Wagon, mostly stock.

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post #2 of 2 (permalink) Old 07-06-2015, 06:50 AM
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vacuum for Heater/AC controls

Suppose any check valve would work. Advance,NAPA,etc,etc...

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