[jerry455]

I did a heater core on my 1976 Firebird last winter, and I thought the tubes were all together in one connector making the reconnecting simple. I will try to find some pictures.

[GVbird]

Thank you.
Yes, they are all on the manifold, but being a rookie Pontiac guy I didn't realize that it separated from the heater control.

[jerry455]

Did you figure this out? I was just looking through my 1976 Factory Assembly Manual and I found a drawing of the vacuum hose diagram.

[GVbird]

I have not found any diagrams on the manifold port to tube colors.
Really odd as some of the manifolds sit at the rear of the heater control, while my son's sits facing downward

[GVbird]

Originally Posted by jerry455

Did you figure this out? I was just looking through my 1976 Factory Assembly Manual and I found a drawing of the vacuum hose diagram.

I have not found any diagrams on the manifold port to tube colors.
Really odd as some of the manifolds sit at the rear of the heater control, while my son's sits facing downward

[jerry455]

This is from the 1976 Firebird Factory Assembly Manual.

[GVbird]

Originally Posted by jerry455

This is from the 1976 Firebird Factory Assembly Manual.

Thank you. That is the same printout I found for a 1978. I may have to just run air through the manifold and move the lever to see what position corresponds.