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 94011604 and also the intake tube o-rings 97729991 because both parts will need to be removed for installation purposes.
This regulator will fit all the of 2004.5-2005 LLY Duramax Diesels
GM Part# 97369850