Fuel Pump Trim Reset

Engine Controls and Fuel - 5.3L L84 or 6.2L L87 | Repair Instructions | Document ID: 4870054 Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis Description This procedure resets the control module learned values of the component/system: Fuel System When to Perform the Procedure

Note

Failure to perform this procedure may result in poor system performance, DTCs being set, or customer dissatisfaction. Perform this procedure when the following component has been serviced: G12 Fuel Pump — Replaced { Diesel } Fuel Filter — Replaced Conditions for Running the Procedure Engine = Not Running Ignition = On Vehicle Speed = 0 km/h (0 MPH) Reference Information Scan Tool Reference Control Module References With Scan Tool

1. Ignition » On / Vehicle » In Service Mode
2. Select: Module Diagnostics
3. Select: Engine Control Module
4. Select: Configuration/Reset Functions
5. Select: Reset Functions
6. Select: Fuel Pump Trim Reset

Note

The scan tool does not display the learn/reset status.

7. Follow the instructions on the scan tool. — The procedure will complete within 10 s Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification