The truck engines/parts are Cat in that Cat sold EVERYTHING from the block foundry equipment to the final machining equipment needed to make those blocks. Many parts may say Cat on them but are made at other Cat plants, generally in Japan, China, or western Europe. Cat has nothing to do with anything on those over the road engines due to the fact that they no longer wanted anything to do with the headaches associated with EPA regs., etc. that went into effect on Jan. 1, 2009! It may look like a Cat and some parts may even be made by Cat but it's not even a Kitty! The truck did have a lot of Cat engineering input but it's not "Made by Cat"! Where is your warranty submitted? That will tell you who made it! There is only one warranty submission place in the whole country for ALL of Caterpillar Tractor Company's equipment!