Cruise control vacum dump I think. Cruise used to work on vacum once the system loses vacum it would shut the cruise off. Now its done through the brake switch electrically.
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93 GT 306 DSS, O-Ringed, AFR 185's, Pro Products Intakes, 55lb low imp inj, 80mm Pro-M meter, 2004 PMS, AFM Power Pipe, Kirban Reg, Vortech S-Trim 14lbs. No times yet. Trying to tune.
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