tow package on 04
Freshman User
Joined: Jul 2003
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Look through your front grill, if you have 2 small coolers in front of the large radiator you have the HD tow package. One is a tranny cooler, the other cools the power steering (I think). I am fairly certain that the existence of a 7 pin connector next to the hitch is also another way to verify. I think w/o the factory tow package all you have is a four pin connection. You also get the higher ratio on the rear axle.
Senior User
Joined: Oct 2004
Posts: 391
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From: Maryland
According to the 04 order guide, the only option required for the Tow Package was the 5.4L engine. The package included 7-pin wire harness, heavy duty auxiliary transmission oil cooler, heavy duty radiator (mid-year production change as of 12/1/03), electronic braking wiring kit, and upgraded the trailer hitch receiver from Class III to Class IV. You could have either the open diff (with or without AdvanceTrac) or LS diff.
I would agree that the 7-pin wire harness is the easiest way to tell, as long as the truck hasn't had any aftermarket mods.
I would agree that the 7-pin wire harness is the easiest way to tell, as long as the truck hasn't had any aftermarket mods.
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