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Home › Cadillac › 1990 › Seville Base, 4T60/ME9 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes › ECM Trouble Code Charts › ECM Code EO63: Vehicle Speed/Set Speed Difference Too High › Test Conditions:

Test Conditions:

Tested when cruise is enabled and engaged, and not in RESUME mode.

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