[Bob Don]

I tow with a 2002 Silverado 2500hd 2wd crew cab, long bed, tow package with Allison trans and 8.1 Vortec. I've got just over 100k miles on it (I bought it with 82k miles 4 years ago) I get about 10 mpg towing a 24' enclosed with a 3705# car plus tools, spares and a scooter. Other than downshifting for hills, you'd barely know you're towing anything. I get the piston slap when i start up cold like Alan said but it doesn't seem to have any ill effects. The engine uses about a half a quart of oil every 3500 miles but by then it's time for an oil change anyways. The only issue I had was a leaky trans cooler in front of the radiator.