Wiseman said:By the way, I read another post where someone found that their front and rear differentials came from GM low on lube. While I was working on the truck this evening I checked mine and found both of them to be low.In fact I put my finger down in as far as I could and couldn't reach the lube in either differential. I'll be calling the dealer tomorrow. I hope no damage has been done.
Everyone.......when getting these trucks new, be sure to check your differential lube levels.