Engine vacuum lines diagram needed?

1977 CHEVROLET SILVERADO
100,000 MILES • V8 • 2WD • AUTOMATIC
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DISCO LARRY2
  • MEMBER
  • 1 POST
I need a vacuum line diagram for 454ci motor. Calif.emissions.chev.C20.
Apr 30, 2024 at 12:07 PM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

Because of the model year, my manuals are somewhat limited. However, I did find a vacuum schematic for a CA emissions specific to your vehicle.

Take a look at the schematic and let me know if it helps. Also, if you are trying to find a leak, here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Let me know.

Take care,

Joe

See pic below.

Apr 30, 2024 at 12:28 PM
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