A truck bed takes a beating from gear, weather, and daily loading, which makes a good spray-in liner and a hard folding tonneau cover essential upgrades. You want that setup to keep your cargo secure and dry, but retail prices on truck accessories rarely stay low unless you catch a holiday weekend sale.
We can time the purchase for a holiday drop and spread out the cost, but let's separate the dealer negotiation from how you pay for it. You want to lock in the lowest out-the-door price on the hardware first, and only then figure out the payment plan.
That 0% window is a hard deadline, not free money, so make sure you have the balance cleared before the 15 months are up. If you still owe anything when that period ends, interest kicks in on the remaining amount.