LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2001 >> Cutaway 8.1 G >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 8.1L >> Inspection/Maintenance Procedures >> Inspection/Maintenance System Check >> Diagnostic Procedures
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedures

  1. Perform powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing powertrain diagnostic system check, go to next step.
  2. Review any service bulletins for software updates that may prevent I/M readiness. Perform any reprogramming or repairs indicated by the service bulletins. If reprogramming or repair service was required, go to INSPECTION/MAINTENANCE COMPLETE SYSTEM SET PROCEDURE . If reprogramming or repair service was not required, go next step.
  3. Using scan tool, observe the I/M SYSTEM STATUS display. If more than one test is indicating a NO status, go to INSPECTION/MAINTENANCE COMPLETE SYSTEM SET PROCEDURE . If only one test is indicating a NO status, perform appropriate I/M system set procedure for the indicated system. See INSPECTION/MAINTENANCE SYSTEM SET PROCEDURE INDEX  table.
INSPECTION/MAINTENANCE SYSTEM SET PROCEDURE INDEX

System With NO Status Perform
AIR System INSPECTION/MAINTENANCE AIR SYSTEM SET PROCEDURE 
Catalyst System INSPECTION/MAINTENANCE CATALYST SYSTEM SET PROCEDURE 
EGR System INSPECTION/MAINTENANCE EXHAUST GAS RECIRCULATION SYSTEM SET PROCEDURE 
EVAP System INSPECTION/MAINTENANCE EVAPORATIVE EMISSION SYSTEM SET PROCEDURE 
HO2S/O2S System INSPECTION/MAINTENANCE HEATED OXYGEN SENSOR SYSTEM SET PROCEDURE 
HO2S Heater System INSPECTION/MAINTENANCE HEATED OXYGEN SENSOR HEATER SYSTEM SET PROCEDURE