This isn't for the gp but the silverado some of you probablly know about the common problem with the cab rocker panel on the drivers side... basicly what happened is gm forgot to seal the back of that panel and it rust there. So I'm pretty sure I need to have new metal put in to fix it right... but I don't really know anything about welding in new metal for body work... so if anybody here has done stuff like this I'd appreciate some advice.