My 2010 Chevrolet Silverado 1500 does not look right with stock rims and tires. My truck is four wheel drive and I am considering a lift. I have a few questions for anyone who can answer them. At what size lift or tire do you have to start messing with gears etc? What and where does the extra strain occur? How will this affect my warranty? What lift or system would be preferred.

2010 Chevy silverado 4x4 4.8 V8

Thanks

Brendon