GMC Box Truck

2000ish GMC boxtruck good shape strong transmission 6 newish tires (bought 15k miles ago) air blows cold. An employee ran it hot and cracked the heads I think. This was a spare truck for my business, I’m not a mechanic and do not have time to mess with it. It seems like an easy fix or a lot of good useable parts. I have owned about 12 of these trucks even if one just cranks its worth about 3k if I don’t sell it I’ll take the box off and put on another cab. I have a clear title not really sure what year it is since I have several.