Circuit/System Testing

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Verify no I/M DTCs are present.
NOTE: Many DTC related repairs will instruct the technician to clear the DTC information. Clearing the DTC will reset the Inspection/Maintenance System Status or Data indicators to NO. Performing the I/M Complete System Set Procedure will set each of the I/M System Status indicators to YES.
- If an I/M DTC is set that would prevent the I/M System Status tests from completing, diagnose that DTC before continuing.
  Refer to Inspection/Maintenance (I/M) System DTC Table .
- Go to next step: If no I/M DTCs are set
Review applicable service bulletins for software updates that would prevent the I/M System Status tests from completing.
- If a control module re-program or other repair is required,
  Perform the Inspection/Maintenance Complete System Set Procedure after repair.
- Go to next step: If no repair is required
Observe the Inspection/Maintenance System Status or Data indicators.
- If any Inspection/Maintenance System Status or Data indicators report NO
  Perform the Inspection/Maintenance Complete System Set Procedure .
- Go to next step: If no Inspection/Maintenance System Status or Data indicators report NO
All OK.