Q&A

The model number is usually stamped into the pan.

Type of fluid is often written on the dip stick shaft!

That'susually the factory part # , not what would be more easily identified in a parts store. 'Course you could just go to the dealer and tell the parts guy there what you need, HOPEFULLY they'd get it right! And your truck might be all the happier for it ( I presume it' high miles?).If you're doing the work yourself , take the money you save on labor costs and put it into the best parts!