Sierra 3500 4WD V8-6.6L DSL Turbo (2007)
Technicians should perform the following cleaning procedure to ensure that DTC P0403 has been eliminated:
Important:
Two scenarios may occur when completing this procedure.
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There is no EGR Valve Motor Cleaning procedure found in the Tech 2 Special Functions. This can occur on 2006 or 2007 vehicles. If the Tech 2
and the ignition is not turned off after programming, a technician may not find the updated EGR Motor Cleaning special function in output controls.
To access the updated special function, turn off the ignition key, power down the Tech 2 (unplug it from the vehicle), power the Tech 2 back up,
rebuild the proper vehicle, and then see if the special function is found. Complete the remaining steps in the bulletin.
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If working with a 2007 model year vehicle, a technician may not be able to find the EGR solenoid command to know when the EGR cleaning
procedure has been completed. When following the bulletin and steps 5.4 to 5.5 are reached, technicians are directed to start the EGR Motor
Cleaning procedure, and monitor the EGR solenoid command. If the EGR solenoid command is not displayed on the Tech 2, the technician will have
to back out of the Tech 2, and build the vehicle as a 2006 model year. When the 2007 vehicle is built as a 2006, the procedure can be completed and
monitored.
Note
Only build the vehicle as a 2006 after the new ECM calibration has been installed, and the EGR solenoid command is missing.
1. Start the engine. Let the engine idle until the engine coolant temperature is greater than 60°C (140°F). Then shut the engine off.
2. Attach a Midtronics 165-PCS charger or equivalent to maintain proper battery voltage.
3. Turn the ignition key to the ON position with the engine off (engine should not be running).
4. Attach a Tech 2(R) to the vehicle and clear all the codes.
Important:
The cleaning procedure may take up to 15 minutes to complete, it is not necessary for the technician to watch or stay with the vehicle. The EGR Solenoid
Command will stop cycling and stay at 0% when the procedure is completed.
