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Home >> GMC >> 1992 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission - Diagnosis - 4L80-E >> Diagnostic Charts >> Code 24 - Output Speed Sensor Low (1991 2WD - Except "C" & "K" Series) >> 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)
G92D14095Courtesy of GENERAL MOTORS CORP.