The G80 in the chevy works a lot like a posi track or lsd, but no clutches, so the engagement is a "clunk" you can hear and its fully automatic acting. It's also 100% in, or 100% out. It's been around for a long time and stock hp with normal use its plenty strong enough.
If I were building a hunting dedicated truck I'd prefer an ARB with a switch in the cab, I'd just flip it in as soon as I get off a main arterial dirt road.
I'd like to put one in the front, but I don't think I'll keep the 2016 Colorado, the CEL is on more than its off once I hit 80k miles. The first 2k miles sucked, towed 5-6 times, that issue was fixed (factory wiring issue) then it was great to about 80k, now its like 88k and constant emission issues. It's gotta go in the shop here soon. Gasser.