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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Diagnosis - A/T >> Diagnostic Code Charts (Trucks) >> Code 81, QDM Fault Solenoid "B" - LT. Truck >> Diagnostic Aids

Diagnostic Aids

Check all connections, especially those at the transmission pass-through connector.

Fig 1: Code 81, QDM Fault Solenoid "B" Troubleshooting Chart (Lt. Truck)
G91J13689Courtesy of GENERAL MOTORS CORP.
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