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Eldorado Base
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Engine Controls - Tests W/Codes
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Pcm Code Charts
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Code P066, Engine Rpm Too High With Cruise Engaged
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Action
Code P066, Engine Rpm Too High With Cruise Engaged: Action
PCM disengages cruise control.
Fig 1: Code P066 Schematic, Engine RPM Too High With Cruise Engaged
Courtesy of GENERAL MOTORS CORP.