400535 OE Fuel Pressure Regulator.
For 2001, 2002, 2003, 2004 GM 6.6L Duramax LB7.
Bosch# 1-465-ZS0-044
Repair a surging or lopey idle with a new fuel pressure regulator.You will need to remove the turbo inlet pipe and upper radiator pipe for installation. See below for the gasket and seal required.
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Application: 2001-2004 Duramax