You got a winner. Last year made for the 2500. No AFM, 6SP 6L90, it’s got the integrated hill braking control, its L96 is set up to drink 100 octane corn fuel and hold over 37 gal of it so when it’s cheap @ $2+ a gal, stock up.
Forget milage, when you can fill up that yacht for about $90, run cooler, without detonation, more hp/tq up grades towing, it’s a win for the pocket book and longevity. Looks like you got the LTZ trim with the HD hard drive Navi & moving grid lines on the back up cam too.
Nice Catch!