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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0010 To DTC P0442) >> Diagnostic Information And Procedures >> DTC P0089, P00C6, P228C, P228D, P2C1E, P2C1F, P2C20: Fuel Pressure Regulator >> Circuit/System Testing

Circuit/System Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle - Off
  2. Verify the following conditions do not exist :
    • Camshaft Position Actuator - Binding or Sticking/Stuck
    • Direct Fuel Injection Fuel Rail - Leaking/Restricted
    • Fuel - Contaminated/Poor Quality
    • Fuel Feed Pipe - Leaking/Restricted
    • Fuel Pressure Regulator - Binding or Sticking/Stuck
    • G18 High Pressure Fuel Pump - Binding or Sticking/Stuck/Loose
    • Q17 Fuel Injector - Leaking/Restricted
    • If a condition exists 

      Repair or replace as necessary.

    • Go to next step : If no condition exists 
  3. Remove the component : G18 High Pressure Fuel Pump
  4. Verify a condition does not exist with the component : Camshaft Lobes - Worn/Visible Damage
    • If a condition exists 

      Replace the component : Camshaft

    • Go to next step : If no condition exists 
  5. Test or replace the component : G18 High Pressure Fuel Pump
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