When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
look out back does it have a hitch? should be a sticker on it that gives you the tongue wt and max wt. does it have a 4 flat or 7 round plug? Look up front behind the grill you should see an oil cooler and tranny cooler.
I don't think there is such a thing as a HD tow package on the Expy. You either have the tow package or not. The hitch below the bumper is the standard tow package hitch.
I think in the literature they refer to it as a HD Tow Package, but as BG points out, there is only one. The under bumper location is not much of an indicator of factory tow package, as that is where an aftermarket hitch would go to. The tranny cooler is the thing to look for. It is basically a small radiator right in front of your regular radiator. You could also just call a dealer with your VIN and they can look up the vehicle for you.