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HOMESERVICE MANUALSCHEVROLET2000CHEVY EXPRESS G3500, VAN CARGO EXTENDED, 6.5 FREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM SELF-DIAGNOSTICS - GASOLINE - 4.3L, 5.0L, 5.7L & 7.4LDIAGNOSTIC TESTSDTC P0336: CRANKSHAFT POSITION SENSOR CIRCUIT PERFORMANCEDIAGNOSTIC PROCEDURES
2000 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.5 F

Diagnostic Procedures

2000 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.5 FSECTION Diagnostic Procedures
  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Start and run vehicle. If vehicle starts and continues to run, see DIAGNOSTIC AIDS . If vehicle does not start and continue to run, go to next step.
  3. Turn ignition off. Disconnect crankshaft position sensor connector. Turn ignition on, engine off. Using test light connected to ground, probe ignition feed circuit of crankshaft position sensor connector (engine harness side). If test light illuminates, go to next step. If test light does not illuminate, go to step  6.
  4. Connect test light between ignition feed circuit and ground circuit of crankshaft position sensor connector (engine harness side). If test light illuminates, go to next step. If test light does not illuminate, go to step  7.
  5. Turn ignition off. Install Gray jumper wires from Connector Test Kit (J-35616-A) between engine harness connector and crankshaft position sensor. Set DVOM to duty cycle position. Connect DVOM between signal circuit and ground circuit of crankshaft position sensor connector (engine harness side). Crank engine. If duty cycle is less than 40-60 percent (V6 engines) or less than 20-40 percent (V8 engines), go to step  8. If duty cycle is not as specified, go to step  9.
  6. Repair open or short to ground in CKP sensor ignition feed circuit. After repairs, go to step  12.
  7. Check for open in CKP sensor low circuit. If CKP sensor low circuit is open, go to step  10. If circuit is okay, go to step  11.
  8. Check for open in signal (3X) circuit or open in CKP sensor low circuit. If circuit is open, go to step  10. If circuit is okay, go to step  11.
  9. Replace CKP sensor. Perform CKP SYSTEM VARIATION LEARN PROCEDURE. After performing CKP learn procedure, go to step  12.
  10. Repair as necessary. After repairs, go to step  12.
  11. Replace VCM. Program replacement VCM using required equipment. After replacing VCM, go to next step.
  12. Using scan tool, select DTC, CLEAR INFO. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter this DTC. Operate vehicle within the conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step  2.
  13. Using scan tool, select CAPTURE INFO, REVIEW INFO. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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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.