When did GM replace the DB-2 injection pump?
When did GM replace the DB-2 injection pump? GM replaced the DB-2 with the electronic throttle DS-4 in 1994-2000 vehicles. The DS style pump used a pump mounted driver known as the PMD. The PMD is an electrical solenoid that drives a plunger solenoid inside the injection pump. When did the 6.5 diesel injection pump come out? In mid-1996 GM implemented a redesigned engine cooling system incorporating twin non bypass-blocking thermostats and a 130 GPM water pump. This improved the flow through the block by 70-75% and flow to the radiator 7%. Through the years there were many different variations...