Bosch Fuel Pressure Regulator (Mprop)
A new fuel pressure regulator will fix the common surging and lopey idle that many high mileage Duramax owners have experienced. It is a good idea to replace the upper radiator pipe seal and also the turbocharger inlet gasket because both parts will need to be removed for installation purposes.
This regulator will fit all the of 2001-2004 LB7 Duramax Diesels
GM Part# 97728979