Originally Posted by The Yellow Dart
Just got a new Die Hard from Sears
I'm pretty sure that it was the original battery -- which is awesome. For what it's worth, my truck was running a Group 27F battery. The Sears guy said he's only seen those in Land Cruisers and whatnot.
27F is the heavy duty battery that comes with the tow package. Assuming your truck has the tow package, it also has a 130 amp alternator, hence, the bigger battery. Recommend you throw a 27F in it and take the other back to Sears since they probably sold you the wrong battery.