I can't substantiate the towing, I am sure others will though. I can say that there are air bag kits available for under $500 that you fill pressure through an air compressor externally. Some people use these and while not as convenient as having an onboard compressor, it might be a good option for you to check out. Especially, if you can install them yourself. From what i've seen people run the lines to fill the bags out near the rear of the truck in the area of the license plate. It's filled just with a schrader valve.
Might be an option to check out atleast. I'm sure you will get a response on towing.
What specific year is your truck? I know it says 2008-2010 but, what is the exact year, that might help folks narrow it down a bit for you.