2000 express 2500 with 5.0 has problems restarting if it has been ran and is up to temp and then stoped for about an hour. when the key is turned, get a series of clicks , batt has full charge.
when restarting after it is up to temp, at times get a series of clicks when the key is turned. And the volt meter on the dash will drop to about 9 volts, yet the battery has a full charge (12.7 volts) when tested will an external volt meter. Let the van sit till it is totally cooled, like over night and it will start right up.