[ob_1jr]

Welcome!!! Yeah, most of those are common problems with the GM trucks.

2. I believe you are right on that one...we have a truck at work that does this too...I haven't noticed mine doing that, but my truck is a little louder than the new ones while idling.

3. My truck sometimes does this...I have read where they have fixed it on other people's trucks. I haven't noticed mine doing it lately though either.

4. There is a number of things that could cause this sound. Without being able to witness the sound, it will be pretty hard to guess on this one. If the dealer doesn't find anything, it is pretty easy to take the dash apart to look for something loose or rattling.

Hopefully the dealer will be able to fix some of the problems for you.