91 HVAC questions
Joined: Oct 2001
Posts: 646
Likes: 1
From: Sedalia, MO
Car: 1991 Z28 convertible
Engine: 305 TPI
Transmission: TH-700R4
Axle/Gears: 3.73 posi 4th gen 10-bolt
Re: 91 HVAC questions
I believe they are vaccum controlled. They are the same things as the pre-91 style, just with yellow letters instead of white.
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Joined: Jul 2006
Posts: 506
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Car: 1989 GTA
Engine: 350TPI w/ Speed Density
Transmission: 700r4
Axle/Gears: Borg warner 3.27
Re: 91 HVAC questions
The hot/cold flapper is cable. All other flappers are vacuum actuated. And of course fan speed is electric.
Joined: Oct 2001
Posts: 646
Likes: 1
From: Sedalia, MO
Car: 1991 Z28 convertible
Engine: 305 TPI
Transmission: TH-700R4
Axle/Gears: 3.73 posi 4th gen 10-bolt
Re: 91 HVAC questions
You can remove the faceplate and just swap in one from an older car with white letters. pull the **** and the little slider buttons off and the faceplate unscrews from behind.
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