GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Controls - 6.6L (LLY) 🢒 Inspection/Maintenance (I/M) Complete System Set Procedure

Description

The purpose of the I/M Complete System Set Procedure is to satisfy the enable criteria necessary to execute all of the I/M system monitors. When all system monitors are completed, the I/M System Status indicators are set to YES. Perform this procedure when more than one of the I/M System Status indicators are set to NO.

Conditions for Running

Cold start

    • The battery voltage is between 11-18 volts.
    • The engine coolant temperature (ECT) is between 60-96.75°C (140-206.2°F).
    • The intake air temperature (IAT) is more than 5.25°C (41.5°F).
    • The barometric pressure (BARO) is more than 74 kPa.

Step

Action

Values

Yes

No

1

Did you perform the Inspection/Maintenance (I/M) System Check?

--

Go to Step 2

Go to Inspection/Maintenance (I/M) System Check

2

  1. Ensure the vehicle is within the Conditions for Running specified in the supporting text.
  2. Turn OFF all of the accessories, e.g., A/C, blower fan, etc.
  3. Set the vehicle parking brake.
  4. Verify the transmission is in PARK for automatic transmissions and NEUTRAL for manual transmissions.
  5. Start and allow the engine to idle for the specified time.
  6. Observe the I/M System Status with a scan tool.

Did both of the I/M System Status indicators update to YES?

2 minutes

Go to Step 3

Go to the I/M System Set Procedure for the systems that did not update to YES

3

Observe the Emission Related DTC portion of the I/M System Status with a scan tool.

Does the scan tool indicate any Emission Related DTCs set?

--

Go to Diagnostic Trouble Code (DTC) List

System OK