DieselDestruction Duramax LB7 CP3 Diesel Fuel Pressure Regulator - 0928400535 (FCA/MPROP) This regulator will fit all the of 2001-2004 LB7 Duramax Diesels Replacing OE# : 97728979, 0928-400-535, 0928400535 Fuel Rail Pressure Regulator ( Mprop ) for 2001-2004 GMC/Chevy 6.6L LB7 Duramax Maintains a constant fuel pressure for fuel that is supplied to the fuel rail. 1 Year Warranty !!!