I just got a newish 2015 Silverado 2500hd 6.0, long bed crew cab 4x4. My last truck was a toyota tundra 4x4. The tundra 5.7 easily pulled my 8,000 lb Arctic fox 25r but the handling was too squirrel...
Lift kits that use rear blocks can also increase axle wrap. I know Ford and Dodge use them without issues, but there is a reason Chevy doesn't use them. I am not bashing the others, but saying maybe Chevy doesn't use them for a reason. A 2015 Chevy 2500 sits pretty high as it is and raising it could cause clearance issues with a fiver.