These will fit on any GM 6.5L Turbo diesel engine from 1994 through 2002 heavy duty and light duty GM Vans and Trucks that have the electronic DS injection pump. They are the latest part number, 34583. This part will cure most of the drivability problems that you encounter like stalling when hot, then restarting only when cold. It's a great idea to have a spare one available in your truck, it could save you big money on a towing bill or time on a vacation. This is only a driver unit (PMD).