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Home >> GMC >> 1993 >> Forward Control 7.4 N >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - V6 >> Self-Diagnostic Tests >> Code 24, Vehicle Speed Sensor 4.3L "S" & "T" Series Utility Vehicles With Manual Transmission, 4.3L, 5.0L & 5.7L With 4L60E Transmission & All 2WD With 4L80-E Transmission >> Preliminary Steps

Preliminary Steps

Disconnect VSS buffer connector. Connect test light between terminals C8 and C9. Turn ignition on. If test light does not light, repair power or ground circuit to VSS buffer.

  1. Test verifies VSS voltage at PCM.
  2. Test verifies VSS signal to DRAC.
  3. Test verifies VSS signal at sensor.
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