I bought a grill guard for my 04 1500 Z71. It was very easy to install but even when driving down the highway I can see it vibrating. I had one that was similar on my Trailblazer before I traded it in and it never did this. I was wondering if this is just a problem I am going to have to live with or can I get something to stop it. It's not damaging the truck at all but it is a distraction while driving. I took it off until I can think of a way to make it stop.