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GMC
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1991
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Value Van 7.4 N
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Repair and Diagnosis
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Transmission
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Automatic Trans
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Diagnosis - A/T
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Diagnostic Code Charts (Trucks)
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Code 83, TCC QDM Fault - LT. Truck
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Diagnostic Aids
Diagnostic Aids
Check all connections. especially those at the transmission pass-through connector.
Fig 1: Code 83, TCC QDM Fault Troubleshooting Chart (Lt. Truck)
Courtesy of GENERAL MOTORS CORP.
Courtesy of GENERAL MOTORS CORP.