HVAC vacuum diagrams

1999 CHEVROLET S-10
141,000 MILES • 2.2L • 4 CYL • 2WD • AUTOMATIC
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COREY HOTTINGER
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  • 1 POST
i have the 4 vacuum lines hooked up to my blend doors, but a black one disconnect and don't know where to reconnect it.
Dec 24, 2019 at 12:15 PM
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STEVE W.
  • ✓Experienced Mechanic
  • 15,381 POSTS
The black line should go to the engine vacuum source which also attaches to the vacuum reservoir under the hood. With the engine running just listed for the hiss from the vacuum leak.
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Dec 24, 2019 at 1:48 PM
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COREY HOTTINGER
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  • 1 POST
thank you.
Dec 30, 2019 at 8:22 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,594 POSTS
Steve W. is one of our best! Use 2CarPros anytime, we are here to help. Please tell a friend.
Dec 30, 2019 at 8:23 AM
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