The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Different air controls for an 87 (with AC)

Axle · 05-15-2021, 02:20 PM

I did this with a ford, I spent a few days pouring over vacuum manuals searching for newer vehicles that had the same vacuum logic tree as the original and in my case, had a cable controlled blend door. Then I went to the autowreckers to find said vehicles and see what would potentially fit.
I'd start with having a close look at the next generation gm trucks or whenever they went to dials and see if they still operated the blend doors the same way. If so, you're golden. Just a matter of patching the old and new together.

05-15-2021, 02:20 PM	#6
Axle Registered User Join Date: Jul 2011 Location: SW Ontario Posts: 1,199	Re: Different air controls for an 87 (with AC) I did this with a ford, I spent a few days pouring over vacuum manuals searching for newer vehicles that had the same vacuum logic tree as the original and in my case, had a cable controlled blend door. Then I went to the autowreckers to find said vehicles and see what would potentially fit. I'd start with having a close look at the next generation gm trucks or whenever they went to dials and see if they still operated the blend doors the same way. If so, you're golden. Just a matter of patching the old and new together.