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Cadillac
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1994
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DeVille Base
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/Codes - 4.9L
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Pcm Code Charts
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Code P090, TCC Brake Switch Input Circuit Problem
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Failure Conditions
Failure Conditions
Vehicle speed changes from 30 MPH or greater to zero with no TCC brake switch input.