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Home >> Chevrolet >> 1994 >> Astro Van Cargo Extended, 4.3 Z >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Electronic Transmission >> Trouble Code Charts >> Code 74, Transmission Input Speed Error >> Diagnostic Aids
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Diagnostic Aids

Check for poor connections in PCM/TCM related circuits.

Fig 1: Code 74 Schematic Transmission Input Speed Error
G94D38383
Fig 2: Code 74 Schematic Flow Chart Transmission Input Speed Error
G94I66058
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