You may know the history behind the Duramax diesel brand. However ... with 1992 and 1993 models using the DB2 mechanical fuel injection pump. In 1994 the DB2 was replaced with the DS4 electronic ...

Diesel fuel was stored in an underground tank tied to an unleaded gasoline pump at a Circle K in Avon, Ohio, resulting in ...

The 6.5 Detroit Diesel Engine Was Beset With Problems ... models so equipped).Without the proper 3-5 psi of fuel pressure from the lift pump, this made hard starting and other issues occur often.