Sean Bourgeois

I know this post is a couple years old, but I thought I should add what my truck has to this. It's a 2013 Silverado 1500 cc 4x4 with the 6.2l code L9H and the NHT max tow package, 3.73 ratio, I noticed some of you posted a pic of the diff cover with 12 bolts, mine is a 14 bolt. Factory stock, bought it brand new. I can post a pic if anyone is still poking around on this conversation. let me know.