2012 ltz
 

Just bought a 2012 LTZ with 89K on the odometer. A couple of questions from the room
1. I ma going to change all fluids. Any particular rear end lubricant i should use?
2 Looking at a AFM disabler. What brand is used and recommended most?
3. Cracked dash so I am looking at the dash cap cover. I have seen a number of them on online. Is there a difference in all those I see on line?
Oil, I see that a number of brands of oil have the 2dexos label on the bottle. Is this Dexos acceptable for this engine, 5.3.

Thanks guys, appreciate the feedback.