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GMC
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1992
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Forward Control 5.7 K, Standard
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Repair and Diagnosis (Single Page)
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Transmission
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Automatic Trans
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Automatic Transmission - Diagnosis - 4L80-E
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Component Test Charts (No Codes)
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Force Motor Circuit
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Diagnostic Aids
Diagnostic Aids
Check transmission pass-through connector and PCM/TCM for poor connections.
Fig 1: Force Motor Circuit Diagnostic Flow Chart
Courtesy of GENERAL MOTORS CORP.
Courtesy of GENERAL MOTORS CORP.