Thanks guys, here is the latest thing I installed which is more of a convenience feature when tailgating or for charging work tools. I hooked up a trailer/camper harness 7-wire trailer plug in the bed and bought a trailer plug adapter that has a plug-in 12-volt receptacle adapter so I can use 12-volt lights, chargers and anything else that runs on low voltage. Its fed thru a 30 amp/fuse protected circuit in the factory trailer harness. Don't have to have the tailgate down or a cord hanging over the tailgate from the factory bumper plug.

I have both but only used the fronts. I don't care for them. Doesn't stay snug by the door and it moves around

I first had the factory rubber mats and hated them.
I then bought the factory heavy duty all-weather mats and hated them.
Finally, I researched others and ended up with the heavy-duty all-weather WeatherTechs and I love them.
I constantly have grand kids in the truck and I do off-roading with my Polaris Razr so chances of getting spills and dirt inside are common.
I don't see or know of what else you can buy to protect the floors any better than these.
I will post comparison pictures later today and you can make up your own mind.

Here are the stock factory rubber mats:



These are the factory heavy duty all-weather premium mats:



This is the All-Weather WeatherTech rear mat which is full-coverage of the entire rear floor including under the seat with cupped edges to contain spills:



Pictures of the front mats are earlier in this thread. I took pictures with the WeatherTechs right out of the box, unrolled and laid down in the truck. After a couple of days the edges lay down and form the edges against the kick panel areas.

Nice truck!

Nice truck! What leveling kit did you use? I'm waiting for my 2015 gmc hd Duramax to arrive in 4 weeks and that is one of the things I want to do.
Thanks!

Thanks, I used the Cognito UCA's, shock extenders, and keys. You definitely need the UCA's or else your ball joints are all out of whack and the bump stops are off giving a poor ride quality. Electronic alignment was used after the installation and corrections were made with no problems.

man that truck is sick im ditching my 12 gmc for a 15 gmc

I know there have been lots of questions about the '15s. Thought I'd post a pic of my set up. 2015 built after August 14, Rough Country 2.5" Leveling Kit, Nitto Terra Grappler 295/60/20 (34.5x12), no trimming required.

Nice truck!