Hvac vacuum line diagrams?

2002 CHEVROLET BLAZER
178,000 MILES • 4.3L • 6 CYL • 4WD • AUTOMATIC
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JOE THE MARINE
  • MEMBER
  • 86 POSTS
Just replace my heater core. what a headache, and a job, and I have a brown vacuum line which is long stretches to the drivers side and can't figure out where it goes. all the other color coded lines are okay and installed , but this one is really driving me crazy. I'm lost on the issue. Thanks for any help.
Mar 21, 2020 at 12:07 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

The brown line goes from the control head to the mode door actuator. I attached a diagram for you to view.

Roy
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Mar 21, 2020 at 1:23 AM
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JOE THE MARINE
  • MEMBER
  • 86 POSTS
Thanks, that was it. I even removed my 2000 Blazer lower panels to trace it also, prior to your answer and did what you instructed, and found the same line ,which gave me piece of mind. Thanks again, and not have to replace both lower panels, but the headache is now complete and very good customer support on your end, you save the day and time for me.God bless all the work all of you do.
Mar 21, 2020 at 11:23 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Thank you for the kind words.

We are always glad to help.

Roy
Mar 21, 2020 at 11:25 PM
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