Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000mi.Have underbody flushing service performed. See "Underbody Maintenance" inExterior Care.
Power Mode Description and Operation
GMLAN and Media Oriented Systems Transport (MOST) Wiring RepairsFuel Rail and Injectors Removal Fuel System Fuel Rail
Special ToolsEN-49248Fuel Rail Assembly RemoverFor equivalent regional tools, refer toSpecial ToolsRemove the fuel injection fuel rail noiseshield-(1).Disconnect the electrical harness from the fuel rail harnessconnection.Disconnect all 4-fuel injector electricalconnections.Remove the fuel rail asse ...