K 2500 Truck 4WD V6-262 4.3L (1988)
Vehicle Speed Sensor: Initial Inspection and Diagnostic Overview
Try the following checks before doing the Symptom Table.
1. Check the GAGES Fuse by observing the Instrument Cluster Indicators.
2. Check the Speedo (RWAL) Fuse.
3. If rear tire size or rear axle ratio has been changed since the vehicle was manufactured, refer to Test C. See: Component Tests and General
Diagnostics/Test C: Programmer Clip Test
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Do the tests listed for your symptom in the Symptom Table. See: Symptom Related Diagnostic Procedures
