If you say your truck's got a Cummins 6.7, it would be reasonable to assume you'd fill it up at the pumps with the big green handles. (Those would be the diesel ... to Cummins' OEM chassis ...
Cummins also developed a partnership with Ram trucks, the brand that was spun off from Dodge's truck ... third-party parts. One owner relayed how they were on their third non-OEM ECM replacement ...