Towing capicity upgrade

[MAXJEEP]

I am shopping for a 2007-20013 Tahoe. I want one with the max towing package able to pull 8200 lbs. The options required for this package is the trailer package Z82 a 342 gear ratio GU6 and a HD cooling package KL5. If I find one with a hitch and a 342 gear can I just add a trans cooler and raise my capicity from 5700 lbs to 8200lbs? I appreciate any help you can give this newbe

 

[jranaudo]

I am picking up a used Tahoe tomorrow. 2008. I have the HD Trailering Equipment package but what is really required to tow higher than 6200 is the NUT package code which is the heavy duty trailering package.

I cannot seem to figure out what this package came with, exception being 4.10 gears. Other than that I even called chevy and they can't tell me.

At 6200 I am just within my range but would love for some clarity on how to add to this using aftermarket parts and mods!