Cat + GM Pickups =?

I'm just wondering here.... What would happen if we contracted the nice folks over at Catepillar to build a diesel for Chevy and GMC trucks? I know that they already have an engine avialable for the M/D and H/D (as in 4500-9500 series) but what about the 3/4-ton and 1-ton trucks, can't they get a Cat under the hood too? Thoughts, questions, and no I'm not bashing the Duramax in anyway, its a great diesel.