Dual Batteries..............
 

These trucks use a lot of power, and the stock Delco batteries don't last very long, or at least that is what I have found with my 30+ GM cars/trucks. Below are the parts needed to put a second battery in a 2007 and up Escalade. This is the Tahoe Police setup

These are the parts you will need, one of each, plus a battery.
25825642 Cable
25876896 F Cable
14005061 Retainer
11509853 Screw

Kirk, this is what you need for dual batteries in your truck. :)