[takid455]

What do the various color stripes on the vacuum hoses represent? Correct the bellow as needed. Car is a 76 , 400 auto, but I assume the color are global/ universal meaning throughout GM.

Yellow - Manifold vacuum source
Red - EGR (ported)
Green - Fresh air?
Blue - ?
Violet - EFE?
White - ?
Other colors?

[Held for Ransom]

I don't know if there is a standard for the colors. Are you looking for a specific engine vacuum diagram for a '76 Pontiac? If so, what's your engine code?

[takid455]

Dont need routing of hoses in general, just which hoses get what color

6E-19 is the proper routing

[Held for Ransom]

Let's hope this is the correct one for you.

[takid455]

WOW!! thanks!!

What source is this from? GM assembly manual? Haven't heard of a description manual.

Looks like:

TVS to EFE - Violet - say this as it could be yellow but other years/ motors list it as Violet. Have a feeling GM kept colors universal.
EGR - Red after control valve
TVS to Carb Tee - Red
TVS to secondary canister - White?? Smudge looks similar to color Key on bottom left
Thermostatic valve to manifold fitting - Green
Vac Adv to Carb Tee - Green

Figured there would be some yellow & blue, but dont see any.

Do they list one for the cruise control? mainly need to see if the hose from the manifold to the transducer has a color. Remaining lines are all yellow.

[takid455]

Engine code is XZ Not listed on diagram but routing matches the components on the car.

[Held for Ransom]

I can find no XZ engine code.

[johnta1]

1976 400 engine - late


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