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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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Automatic Transmission - Diagnosis - 4L80-E
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Diagnostic Charts
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Code 24 - Output Speed Sensor Low (1991 2WD - Except "C" & "K" Series)
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Diagnostic Aids
Diagnostic Aids
Very carefully check the pass-through connector at transmission.
Fig 1: Code 24 Troubleshooting Flow Chart (1991 2WD - Except "C" & "K" Series)
Courtesy of GENERAL MOTORS CORP.
Courtesy of GENERAL MOTORS CORP.