I've heard there are head differences for different 2008 builds and that later is better. Search didn't seem to offer much and so I am trying to determine how important the build date is on a 2008 Expy.
Along these lines, as I'll be using it to haul a car trailer, is the factory tow package worth it, or is it better to get an aftermarket hitch and tranny cooler?
I found the engine build date when they changed the head design to the new spark plugs - wrote it down sometime in the past so I'm not sure which thread its in - the switch over date is 10/08/07 - again this is engine build date, not the vehicle build date, so you will need to find the engine build date which I think would be some where on the valve cover or top of the engine.
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