C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Cruise Control Vacuum Line

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Old Feb 2, 2013 | 01:20 PM
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Default Cruise Control Vacuum Line

just noticed mine was falling to pieces, need to replace it, where does the line go to and get its vacuum from?
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Old Feb 2, 2013 | 02:48 PM
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Originally Posted by ssdan
just noticed mine was falling to pieces, need to replace it, where does the line go to and get its vacuum from?
You have a label with the diagram on the left side of the radiator cover.

You should post your car year
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Old Feb 3, 2013 | 03:32 AM
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Depends on the year. It's always a good idea to put the year in the post so we don't have to guess or go on a research project in your profile to find out how to answer.

The L98s have a vacuum check valve on the driver's side of the distributor that feed vacuum to the cruise control. Its source is a vacuum fitting on the rear of the plenum on the passenger side.

LT1s have a similar vacuum check valve under the fuel rail covers.
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Old Feb 3, 2013 | 10:33 AM
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sorry it's a 96
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Old Feb 4, 2013 | 10:14 PM
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Mine has failed also. I have a 96 LT-4 and my hose has been cut. It goes from the split just before the ASR to a wireing harness that will get it into the the car's interior. I can't figure out how to get the panel off that is under the driver's side dash. Also, would this hose come from the clutch pedal? When I had both cylinders replaced, this is when it stopped working. If I can get the panel removed I should be able to finally fix something in my baby myself. Thanks for any help.
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Old Feb 5, 2013 | 12:25 AM
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The vacuum switch is on the brake pedal. It disengages the cruise control when you step on the brake.
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Old Feb 6, 2013 | 04:21 PM
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Originally Posted by Cliff Harris
The vacuum switch is on the brake pedal. It disengages the cruise control when you step on the brake.
is there anything on the clutch pedal? and how do I remove the panel to get to this switch?
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Old Feb 6, 2013 | 06:09 PM
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Originally Posted by Rastan
is there anything on the clutch pedal? and how do I remove the panel to get to this switch?
Check your PM.
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