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Thought the puck system was for 2014 and up?
Link Posted doesn't mention 2013.
I would not have posted a link the OP couldn't use, just need to scroll down in the listing. The 2013 3500 entry is the last ones in the list.
Ram 3500 2013 Big Horn, Laramie, Laramie Longhorn, Lone Star, SLT, ST, Tradesman 5.7L V8 - Gas, 6.7L L6 - Diesel