My truck is an 04 Z71 4x4 i'v had it for three months and i have had an 87 mustang gt for 3 years and had less problems out of it. I took it mud ridin 2 weekends ago. I hit one not so deep mud whole asd a couple of dried up ruts. i had to but in 4lo to get out but i'm completely stock including wheels and tires. My front passanger side axle is leaking a little and my transmission line is leaking somewhere i've also had my window motor go out. this so far has been the biggest piece ever. 03 tundra and a 98 chevy pickup was with me and they hit 6 or 7 big holes and they haven't torn up anything.