Once in a while the lights won't show up on my 4 button auto trac. The buttons work yet they don't show you what drive is engaged. But lately the lights do work and it shows that I'm in 2HI. It can just be scary if you don't know if your still in 4wd when you want to go back on the highway and can't tell if 2Hi has been re engaged. I usually use auto 4x4 though, only had to use 4low once when I was really dug in the mud. Never not gotten out though. People are usually amazed of how formidable of an offroad vehicle my tahoe is. The only problem I ever really have is clearance and flex when I'm riding trails out on farm land or something, which is an easy fix if you've got the $.