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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls - 6.6L - Introduction (2 Of 2)) >> Description and Operation >> Fuel System Description >> Fuel Injection Pump

Fuel Injection Pump

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Fig 1: View Of Fuel Injection Pump
GM660523Courtesy of GENERAL MOTORS CORP.

The fuel injection pump is a mechanical high pressure pump. The fuel injection pump is located below the intake manifold. Fuel is pumped to the fuel rails at a specified pressure. Fuel pressure is regulated by a valve on the inlet of the fuel pump, controlled by the engine control module (ECM). Excess fuel from the fuel injection pump returns to the fuel tank through the fuel return pipe and a fuel cooler.