@ bvjh
you should have a fixed asset account for the truck, then a sub account, also fixed asset type called accumulated depreciation-truck

at the end of the year you post a journal entry (regardless of whether you take section 179 or annual depreciation)
debit depreciation expense
credit accumulated depreciation-truck

the truck and the associated depreciation account remains on the books until you dispose of the truck.

QB does not do depreciation entries for you.