HVAC vacuum line diagrams?

JOE THE MARINE

MEMBER
2002 CHEVROLET BLAZER
4.3L
6 CYL
4WD
AUTOMATIC
178,000 MILES

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.

Saturday, March 21st, 2020 AT 7:07 AM

3 Replies

ASEMASTER6371

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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Saturday, March 21st, 2020 AT 8:23 AM

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.

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Sunday, March 22nd, 2020 AT 6:23 AM

ASEMASTER6371