1977 -- Does anyone have pics/diagram of the solenoid bank?

M

Monorail Red

New member
Jan 1, 2026
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The subject line pretty much explains it. I'm trying to understand the air system and figure out what air lines do what. PO painted the wheel wells, so the only place I can see the colors of the lines is at the solenoid bank.

I've seen flow diagrams, I'm looking for a pic or drawing of the actual solenoid bank. Looking at the shop manual doesn't help me, it's a '77 and the shop manual I have is for 75-76
 
Monorail Red said:
The subject line pretty much explains it. I'm trying to understand the air system and figure out what air lines do what. PO painted the wheel wells, so the only place I can see the colors of the lines is at the solenoid bank.

I've seen flow diagrams, I'm looking for a pic or drawing of the actual solenoid bank. Looking at the shop manual doesn't help me, it's a '77 and the shop manual I have is for 75-76
Click to expand...
You can use a little acetone and wipe off the paint to see the line colors.
 
Layout can kind of be deduced by studying the diagrams and looking at what hooks to what. I agree a nicely labeled photo would be better. Maybe someone has one.

I could make one maybe later this week. I need to dive into all this on my 76 anyway.
 
Applied GMC
GMCMI Fall 2026 Rally

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