C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Jun 27, 2025 | 05:00 PM
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Default Mystery part


1980, 350 4bbl T top
Can someone tell me what device this is with the ‘Hold’ and ‘Engage’ labels on it? Located below the master cylinder, above where the vapor canister should be. I’ m having a hard time finding it in my AIM….(disregard the various plugged vac lines)
Thanks guys.

DW
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Old Jun 27, 2025 | 05:10 PM
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Cruise control
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Old Jun 27, 2025 | 05:32 PM
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Thank you Stingr69 .
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Old Jun 28, 2025 | 01:16 AM
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Did you plug that hose with a screw or did a previous owner?
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Old Jun 28, 2025 | 09:18 AM
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All vac lines plugged by previous. I did not remove actual lines, as i’m not sure what they are for, yet.
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Old Jun 28, 2025 | 06:34 PM
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They are a common failure mode for the cruise control. This "transducer" can be rebuilt by a few people on Ebay. If you want it to work, that is probably the way to go.
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