Fuel System Description: Notes

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Fuel Injection Line Routing Diagram

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Fuel Rail
2	Fuel Pressure Sensor
3	Fuel Injectors
4	Fuel Return Junction Block
5	Fuel Cooler
6	Fuel Tank
7	Fuel Filter/Heater Element Housing
8	First Start Fuel Bleeder Valve
9	Fuel Injection Pump

The fuel tank (6) stores the fuel supply. A mechanical fuel injection pump (9), located below the engine intake, includes the fuel supply pump and the high-pressure pump. Fuel is drawn through the fuel filter/heater element housing (7), which combines a water separator, a hand prime pump, a fuel heater element and a filter element. An integrated hand prime pump is used to prime the fuel system after changing the fuel filter or servicing the fuel system. The mechanical fuel injection pump output is controlled by the ECM, and provides fuel at the pressure needed by the fuel injectors (3). The fuel injectors supply fuel directly to the combustion chambers of the engine. A separate pipe returns unused fuel through a fuel cooler (5) to the fuel tank.