5.3 standard, 6.0 optional.

I forgot about the LTZ/6.0L option myself. Do they offer that in the newest body style?

Yes.

Are you getting a bigger boat one day?

If so, go with the 2500 Suburban with the 6.0L.

IMHO, you don't really want a 5.3L tow vehicle.

I have an 08 AV LTZ with the 5.3 it pulls my Baja 242 great. Wish it had a larger fuel tank..............it drinks gas when I tow
75 mph

Looks like mixed reviews about the 5.3 and 6.0 . One person said "the 6.0 feels like a dog". If the 6.0 feels like a dog, I'd imagine the 5.3 would be substantially worse. What are the power differences between the the two? For the people who have driven the 5.3, is it substantially less powerful than the 6.0 ?

i'm on my 4th 5.3 vehicle

only one that towed decent had 4.10's...

HP ratings have changed over the years, but I believe currently they are 290hp and 360hp respectively. Older 6.0s may be a little less.

I think I would sum it up like this; if you can find the Av you like in a 6.0, buy it. On the other hand, if you find an Av that you really like and the price is right, don't not buy it because it has a 5.3. The majority of Avs out there will have the 5.3.

You should consider finding a AV 2500 with the 8.1. I picked mine up on the used market and saved a ton of cash. Lot's of low mileage inventory out their too.

Tows my 35 on a Myco like a dream. Gas averages 12.5 mpg non-towing and around 9mpg towing.

The 2500 AV and the 2500 Suburbans that have the 8.1L are BRUTES.

Do you have the 4.10 or 3.73 rear end gears? I got about 11 MPG daily driving with mine, but I had 4.10s, wider & taller tires, K&N FIPK intake, and bug deflector, along with a couple torsion bar cranks. ALL of these negatively affect MPG. Not to mention my exhaust sounded great and I kept my foot in it a bit.