Vacuum line diagrams

Tiny
MICHELE HILTON
  • MEMBER
  • 2003 CHEVROLET BLAZER
  • 4.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 172,800 MILES
Need diagrams for the vacuum lines on my 03 Chevy Blazer LS; X, 4dr 4wd vortex 4, 3 liter v6 automatic
Saturday, April 30th, 2022 AT 12:44 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

I'm not sure if you are looking for a leak or not. However, if you are, here is a link that explains how to locate one.

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

As far as the vacuum schematics, I attached what I have below for your review. The first one is for the EVAP/emissions control system. The second is for the HVAC system.

Take a look through them and let me know if you have questions.

take care,

Joe

See pics below.
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Saturday, April 30th, 2022 AT 9:40 PM

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