The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Scott's 1972 Chevy K-20. A place to start.

1985-GMC · 06-06-2013, 08:56 PM

I think most people keep the vacuum pump to run all the heater/ AC controls, so its pretty handy to already be on there.

06-06-2013, 08:56 PM	#131
1985-GMC Chevy Enthusiast Join Date: Jul 2009 Location: Canyon Lake Texas Posts: 2,024	Re: Scott's 1972 Chevy K-20. A place to start. I think most people keep the vacuum pump to run all the heater/ AC controls, so its pretty handy to already be on there. __________________ Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress)