Is there anynway to hook my engine up to a diagnostic tool to pull engine hours? It doesn't have an hour meter on the dash. It is a 1998 Caravell with a 4.3. I have lots of maintenance documentation but it all seems to be annual/biannual instead of based on hours. I have a receipts for a new engine in 2004, but would like to know how many hours are on the current engine. Thanks!