Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2000CHEVY EXPRESS G3500, VAN CARGO EXTENDED, 6.5 FREPAIR AND DIAGNOSISELECTRICALGAUGESANALOG INSTRUMENT PANELSSYSTEM TESTSSPEEDOMETER/ODOMETER INOPERATIVE (GASOLINE)
2000 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.5 F
Speedometer/Odometer Inoperative (Gasoline)
2000 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.5 FSECTION Speedometer/Odometer Inoperative (Gasoline)
- Check function of Vehicle Speed Sensor (VSS) and Vehicle Control Module (VCM). See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If problem is resolved, system is operating properly, no further action is required. If problem is not resolved, go to next step.
- Disconnect instrument cluster harness connector. Disconnect VCM harness connector C4. Using an ohmmeter, check for continuity between instrument harness connector terminal B14 (Dark Green wire) and ground. If continuity does not exist, go to next step. If continuity exists, repair short to ground in Dark Green wire.
- Using an ohmmeter, check for continuity between instrument cluster harness connector terminal B14 (Dark Green wire) and VCM harness connector C4 terminal No. 4 (Dark Green wire). If continuity exists, replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. If continuity does not exist, repair open in Dark Green wire.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.