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Home >> GMC >> 2023 >> Canyon AT4 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.7L - Repair Instructions >> Repair Instructions >> Fuel Pressure Relief >> Fuel System
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Fuel System

Scan Tool Method - Preferred

  1. Install a scan tool and turn the ignition ON.
  2. Using the scan tool, command the fuel pump OFF allowing the low pressure fuel pump to shut off.
  3. Start the vehicle and allow the engine to idle until the engine stops. The engine will stop in approximately 5-20 seconds.
  4. Repeat step 3. Using the scan tool, verify pressure has dropped to a minimal level.
  5. Turn the ignition OFF.
  6. NOTE:

    To avoid fuel spillage.

  7. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  8. When the fuel system repair is complete, connect the battery negative cable. Battery Negative Cable Disconnection and Connection

Alternate Method - If a scan tool is not available

  1. Disable the fuel pump by removing the B+ fuel pump control module fuse. Electrical Center Identification Views
  2. Start the vehicle and allow the engine to idle until the engine stops. The engine will stop in approximately 5-20 seconds.
  3. Attempt to restart the vehicle to ensure pressure has dropped to a minimal level.
  4. Turn the ignition OFF.
  5. NOTE:

    To avoid fuel spillage.

  6. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  7. When the fuel system repair is complete, connect the battery negative cable. Battery Negative Cable Disconnection and Connection