New Truck- What am I in for?

[Matador]

My main truck is a 1987 Chevrolet 1/2 ton that I've outgrown. I'm looking for something more.

I found a city surplus truck. I know the man responsible for maintanence, so I'm not too worried there. Anyways, it's a 2006 Chevrolet 2500HD, with the 6.0 V8, an Automatic transmission, 4x4 (Floor shifter), and about 125k miles. It's an extended cab/short box truck.

On first impression, I'm in love. But, my newest truck was a 1995. I don't know much on these newer trucks.

I'm just looking for some general advice- I've read that the 6.0 is a beast of an engine. I'm fine with the gas mileage- this truck would be a towing machine, not my daily driver.

I know that the 4.11 gear ratio is what I want. How can I tell if this truck has it. I'll see if I can get someone to unlock the doors, but I don't know what I'm looking for on the tag. Does Chevy still use RPO codes in the glovebox?

Are there any major problems with these trucks that I need to be aware of?

I'll be using it in my business. I'd like to be able to tow 5000#, and throw another 1500# in the bed if need-be. I've read that there's a payload sticker in the glovebox- is that true for this truck?

I'll be driving long distances on the highways/Interstates. Is this enough truck for the job? I'd like to buy the right truck the first time. I can't afford a diesel, and this is the only truck that's up for auction now... other than a Ford Ranger.

Any advice on these would be great! I feel like a fish out of water!

Thanks for the help!