Front Suspension Leaf Spring Shackle problems of the 2005 Chevrolet Silverado 1500

My 2005 silverado that I bought brand new was brought in for body work on the bed on the truck. When the body shop removed the bed to do the body work repairs they discovered that the frame, frame cross members, leaf spring shackles, brake lines, shock mounts are rusted and rotted through. No under coating left anywhere on my frame or under my gm silverado. The vehicle is now deemed unsafe for the road and general motors knowing the vehicle is unsafe has said they can not help me and has not assisted with repairing the trucks frame at this point. I am still working with general motors to attempt to resolve this issue. This is a know issue that gm does not want to address easily for us consumers. Longest lasting trucks on the road is there slogan my lasted 8 years. Guess silver-rot-o's are disposable trucks after 8 years. General motors will need to step up and resolve my issue or I will never buy another new gm product ever again. Plan to bring the truck to local dealers to show them the damage while the bed is off the truck. Bottom line is this. . . . My gm truck is unsafe for the road, gm needs to fix my truck to keep this loyal gm owner satisfied with there product line. Mind you I own 5 gm vehicles my wife's grandfather sold pontiac's for 50+ years. This is not the way to stand by your product gm and the easiest way to lose a life lone loyal gm customer. Toyota is standing by there trucks by fixing frame rot issues for their consumers you should too. Mine was built in canada just as a side note. Fix my 2006 silverado truck gm. Stand by your word and horror your slogan and make my silverado the longest last truck on the road.