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Author Topic: vacuum source for heater/defroster controls  (Read 3315 times)

Offline alec22

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vacuum source for heater/defroster controls
« on: December 22, 2006, 10:23:00 pm »
It seems that the previous owner cut the line as it exits the cab of the truck.  I need to know where the vacuum line is connected so that I get my defroster/heater and what-not working.

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Offline VileZambonie

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Vacuum controls
« Reply #1 on: December 22, 2006, 09:54:00 pm »
The heater controls should go to the round vacuum reserve canister and the canister should receive manifold vaccum

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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline joesgarage71

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Re: Vacuum controls
« Reply #2 on: December 23, 2006, 08:13:00 am »
The vacuum line comes out of the firewall on the passenger side of the engine.
Steve

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78' K-20 355/SM465/twin stick 205 6" on 36's
14 bolt FF/big bearing Dana 44 4.56 gears
92' GMC C-1500 454/4L80E/14 bolt

Offline Fast68

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  • Posts: 58
Re: Vacuum controls
« Reply #3 on: March 15, 2007, 04:26:00 am »
intake manifold to blackpalstic container and then to the vacuum line runnign inside the cab at the heater box wiring

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