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 MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 55 (ENGINE CONTROLS - SELF-DIAGNOSTICS - 3.5L)INSPECTION/MAINTENANCE PROCEDURESINSPECTION/MAINTENANCE AIR SYSTEM SET PROCEDUREDIAGNOSTIC PROCEDURES
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F
Diagnostic Procedures
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Diagnostic Procedures
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- If I/M system check has been performed, go to next step. If I/M system check has not been performed, go to INSPECTION/MAINTENANCE SYSTEM CHECK .
- Ensure vehicle is operating with conditions for running this procedure. See CONDITIONS FOR RUNNING TEST . Turn off all accessories, including A/C and blower fan. Start engine and allow it to idle for 2 minutes. Accelerate at part throttle to 45 MPH and maintain speed for 3 minutes or until or until I/M system status indicator updates to YES. Using scan tool, monitor I/M system status display. If AIR system status updates to YES, go to step 5. If AIR system status did not update to YES, go to next step.
- Using scan tool, observe DTC information. If scan tool indicates any failed DTCs, perform appropriate diagnostic test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If scan tool does not indicate any failed DTCs, go to next step.
- Using scan tool, observe NOT RAN SINCE CODE CLEARED display to determine if DTCs P0410, P1415 and P1416 have run. For those DTCs that have not run, operate vehicle under conditions to meet the Conditions For Running The DTC. See CONDITIONS FOR RUNNING DTC . Using scan tool, observe I/M system status display. If AIR system status updated to YES, go to next step. If AIR system status did not update to YES, see DIAGNOSTIC AIDS .
- Using scan tool, observe emission related DTC portion of I/M system status display. If scan tool indicates any emission related DTCs, perform appropriate diagnostic test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If scan tool does not indicate any emission related DTCs, system is okay.
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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.