[mgarblik]

I know this bulletin has been asked for numerous times but I could only find 9 pages posted after searching for several hours. I believe this bulletin is 16 pages and I need the entire document to properly put my car back together. I am more than willing to pay for a clean copy either in paper form or e-mailed to me. Please PM if you have this document. Thank you.

[Held for Ransom]

I don't think I have 73-T-21A, just 73-T-21. See if johnta1 has it. I will double check later tonight.

[johnta1]

Try this link:


73-T-21A

[mgarblik]

Originally Posted by johnta1

Try this link:


73-T-21A

That is just perfect. Extremely helpful. I was hoping one of the 16 pages would call out the vacuum hose stripe colors for the EGR and TCS systems. I have them for a 74 SD-455, but not a 73. Anyone happen to know the callout colors for the hoses. This is not generally something I would care about but this 73 SD I am putting back together, hoping to make it as correct as possible. Thanks again.

[SD73]

Originally Posted by mgarblik

That is just perfect. Extremely helpful. I was hoping one of the 16 pages would call out the vacuum hose stripe colors for the EGR and TCS systems. I have them for a 74 SD-455, but not a 73. Anyone happen to know the callout colors for the hoses. This is not generally something I would care about but this 73 SD I am putting back together, hoping to make it as correct as possible. Thanks again.

This is from a two part article Pontiac Enthusiast did back in '94.

Yellow-striped full manifold vacuum supply to either the thermal sensor and/or the solenoid.

Red-Striped controlled vacuum signal from the switch and/or solenoid to the distributor advance unit.

White-Striped ported vacuum signal from the carb to the EGR thermal sensor or solenoid.

Black hose with white markings is used from that point to the EGR valve.

[mgarblik]

That's what I needed. Much appreciated.

[SD73]

No problem. I stumbled on an old diagram I put together you might find helpful. I haven't implemented it myself. Let me know if you concur with the layout.

[Held for Ransom]

I posted the colors of my late year production '73 350/2 bbl/manual Formula here...
https://forums.maxperformanceinc.com...d.php?t=873846

[Held for Ransom]

I wish I had better pictures.
1973 SD-455/auto A/C emission hose colors.

[SD73]

Here's one I saved to pile on HfR's post. I'll post more if I can find some.