this is a safety issue that gm is aware of it fails state inpsection an is a problem on all these trucks went an called the dealers a couple different ones an they all say its a manufactor defect in design but their is no recalls or help from gm to fix a problem they know about. they also mention the rear bumper an brake lines rusting away which is safety issues but wont fix their design falls. i dont see this problems with other manufactors only the gm trucks.