Dealers LOVE to sell vehicle add-ons, like TRD performance upgrades, bedliners, etc. This is probably because new vehicle buyers love to purchase these add-ons. Dealership finance departments are often able to add the cost of accessories or new parts to the cost of a new truck, which means it’s often very easy to buy add-ons at the dealership. Dealers take care of adding all the gear you want, and you get a nicely customized truck for a monthly payment.
Is this practice of buying accessories at the dealership and financing them into the vehicle purchase price a good idea? Not really.