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Discussion Starter · #1 ·
I recently found several rubber vacuum lines which have disintegrated on the motor of my 2000 Extreme. One of the vacuum 5/32" lines is on the driver's side of the engine compartment and appears to be part of the main harness near the firewall. The 7/32" line goes to the top of the throttle body. See picture below.
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What I am trying to determine is where and to what does the vacuum line hook up to? Does anyone have a vacuum line diagram for the 2.2L in my 2000 Extreme?
 

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B4U Task Force Admin
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Never mind...just noticed it was a 2.2.
 

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time to get cereal
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literally the most common topic ever posted. Search bar is at the top.
 

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Discussion Starter · #4 ·
Thanks for reminder...after reading several threads, found the hidden vacuum reservoir! Didn't realize one was even there! Once I replaced the rotten vacuum hoses and established the designed vacuum routing, all HVAC functions are now operating properly (y)(y)

Now awaiting next gas fill-up to see if my gas mileage improves due to correcting that vacuum leak. My 2.2L, with the exception of a K&N air filter setup, is basically stock and the MPG is hardly hits 20 miles.
 

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Discussion Starter · #5 ·
One last item: Is there something missing as indicated in the attached pictures? Also, there is a capped plug?
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From your experience, what could have been removed? Thank you in advance!
 

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time to get cereal
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That's where the cruise control would mount if you had it (and is probably what that plug is for), but those holes look more like a alarm system siren used to be there.

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I agree, that's not the bolt pattern for a Cruise control module. I believe the wiring always included the connector so GM didn't have to make different harnesses for each option. Since it has a cap probably never was installed. If it had been removed where did they get the cap? Not like you can go to a dealer and order a cruise delete wiring connector cap.
 

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Discussion Starter · #8 ·
OK...thanks for the information and suggestions guys! If that plug is indeed for cruise control, hmmmm...possible project in future. Thanks again!
 

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time to get cereal
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I believe the cruise harness is part of the tilt steering option. I don't think I've ever seen factory cruise on a fixed column, always aftermarket. I would guess you have a tilt column then? Adding it might be hit or miss depending on the programming in the computer.
 

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I believe the cruise harness is part of the tilt steering option. I don't think I've ever seen factory cruise on a fixed column, always aftermarket.
Are you referring to later models? Your '95 has cruise and no tilt.
 

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time to get cereal
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Are you referring to later models? Your '95 has cruise and no tilt.
Yea, 98+. My '01 didn't have any cruise wiring, but it did have a bunch of stuff in the column for an automatic transmission.
 
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