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 MANUALSCHEVROLET1996PICKUP C2500, 2D PICKUP, 6.5 F, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM & COMPONENT TESTS - GASOLINEEMISSION SYSTEMS & SUB-SYSTEMSFUEL EVAPORATION CONTROL (C-3)CANISTER PURGE SOLENOID
1996 Chevrolet Pickup C2500, 2D Pickup, 6.5 F, Automatic
Canister Purge Solenoid
1996 Chevrolet Pickup C2500, 2D Pickup, 6.5 F, AutomaticSECTION Canister Purge Solenoid
- Set parking brake and block drive wheels. Warm engine to normal operating temperature. Ensure engine coolant temperature is greater than 113°F (45°C). Check vacuum source to solenoid. Repair if vacuum is not present. Disconnect purge outlet hose from solenoid and connect vacuum gauge. Connect scan tool and select EVAP PURGE SOLENOID CONTROL.
- Increase engine speed to 2000 RPM. Using scan tool, command evap purge solenoid ON. Vacuum should be present when solenoid is energized. If vacuum is present, check purge vacuum hose to canister. Repair as necessary. If vacuum is not present, go to next step.
- Disconnect purge solenoid harness connector. Connect test light between canister purge control and ignition feed circuit harness connector terminal (Pink wire). Command evap purge solenoid ON. If test light illuminates, check for poor connection at purge solenoid or for faulty purge solenoid. If test light does not illuminate, go to next step.
- Connect test light to an alternate ground and probe ignition feed circuit harness connector terminal (Pink wire). If test light illuminates, go to next step. If test light does not illuminate, repair open or short in ignition feed circuit.NOTE: When replacing PCM/VCM, new PCM/VCM needs to programmed when installed. Refer to COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION section.
- Connect test light to battery positive. Backprobe canister purge control circuit PCM/VCM harness connector (Dark Green/White wire). Using scan tool, command evap purge solenoid ON. If test light illuminates, repair open in PCM/VCM harness connector circuit. If test light does not illuminate, check for poor connection at PCM/VCM connector or check for faulty PCM/VCM.
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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.