Fuel Pump Replacement

Fig 1: Fuel Pump

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
WARNING: Refer to Gasoline/Gasoline Vapors Warning . Preliminary Procedure Remove the fuel pump insulator. Refer to Fuel Pump Insulator Replacement . Remove the fuel pump intermediate pipe. Refer to Fuel Feed Intermediate Pipe Replacement . Install a NEW fuel pump intermediate pipe. Disconnect the fuel pump fuel feed hose from the fuel pump. Refer to Plastic Collar Quick Connect Fitting Service . Special Tools EN-50790 HP Fuel Pump Installation Alignment GaugeFor equivalent regional tools, refer to Special Tools .
1	Fuel Pump Fasteners (Qty: 2) WARNING: Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete. CAUTION: Refer to Fastener Caution . Tighten 15 (11 lb ft)
2	Fuel Pump Gasket NOTE: Install a NEW fuel pump ring and gasket (2). Ensure the fuel pump housing gasket (2) is properly aligned with the tab upward at the 2 o'clock position.
3	Fuel Pump NOTE: To aid installation of the fuel pump, rotate the engine so that the fuel pump lobe of the intake cam is at it's lowest point. Use the EN-50790 alignment gauge to ensure that the camshaft lobe is in the base circle position. At the base circle position, the tool will be flush with the head. Lubricate the high pressure fuel pump cylinder head bore with clean silicone free 5W30 engine oil.