i tend to agree with the others. the 3:08's and 3:42's are useless to me. my current '04 Silverado has the 5.3 and 3:73's and i won't consider anything less. in fact i've been kicking around buying a 3/4 ton or 1ton SRW truck for my next vehichle as they seem to be marketing 1/2 ton's towards super market duty and the weekend trip to Lowe's. other points worth mentioning on the new GM trucks that i've read about are:
-do NOT get cloth seats as they are magnets for lint.
-the cylinder cut-out mode(where the truck goes from 8cyl to 4cyl at highway speeds) is not a big hit with ones who own these trucks. I've heard complaints of tapping lifters as well as increased oil consumption. do a search on some GM truck forums and you'll find alot more info on this.
-you might have to order your truck to get the gears you prefer as all i've seen are lots are 3:08 and 3:42. infact the 3:42's are becoming more rare to find. if you have to order the truck you usually don't get as good of a price as one you buy off the lot around this time of year as they are trying to move what they have left.
-at least drive a 6.2(if you can find one on the lot). the gas mileage isn't much worse then a 5.3, you get the MAX tow package, 3:73 gears, and all the power you could ever want in a 1/2 ton truck. no cylinder cut-out mode crap on these either.
-be ready to be dissapointed in the thickness of the sheet metal of these new trucks. it's nothing close to what your current truck is.
-make sure your truck comes with the auto climate control over the manual climate control as you get a few more options with this package(well worth the extra couple hundred bucks imo).
my truck is about to turn 100K miles and i think i'm going to hold on to it for a couple more years. i just sunk about $700 into it and there really isn't anything out there, as far as trucks go, that i HAVE to have at the moment. i've looked at the new GM trucks, and while they're ok, that's just it....they're ok, not a must have in my opinion. i don't see any reason to trade my truck on one. i do like the new HD's but i like the F-250's alot more and i'm waiting to see what Dodge has up its sleeve in the next year or so.