Not a bad ending to the rear end story
I ended up bringing it back to the chevy dealer where I bought it from - you guys will enjoy this - after they had worked on the truck for about an hour and a half test driving pulling the rear diff cover and poking around the service lady calls me back with the we didnt find anything wrong - the fluid was just a little low and then continues on to try to sell me some service pack, while reviewing this with me she says after 122,000 this, this and this needs to be done, I found this interesting since I only had 73,000 on my rig. They had been working on the wrong truck all morning. I couldnt believe it, I was a little pissed at first for them waisting my time but then couldnt stop laughing about it. Hard to believe but not that hard. So after they test drive my chev she calls back and it sounded like it actually totaly locked up on them when they were test driving it. She said the tech pulled the diff cover and got in to it - her exact words "your spider gears are blown to pieces". The other words that were music to my ears "your warrenty covers this so all you will need to pay is the $50 deductible" finally after all the warrentys I have purchased over the years one will pay off.