That truck should have quick connect hose ends. If so, the hoses would be problematic to join together and bypass the core. If there is no visible leaking into the cab, and the coolant level isn't dropping that you can see (or him), I'd leave it be until you can work on it. A little early in the spring to disconnect it. The a/c lines may be in the way. If so, the refrigerant would have to be removed before disconnecting the lines.

Dave