Hi, I bought hptuners for mostly to remote tune my 2011 camaro. There's a guy I work with that has a 2010 5.3 Z71 and is wanting just a little extra power. He pulls a 28 foot enclosed trailer and says its a little sluggish when towing. The truck is stock except for he put 285 tires and stock where 265.

Basically he's wanting to try to get a few extra mpg and a little extra hp for pulling. Any tips on where to start so I can help him out. Everybody he called is wanting 400 to tune it. I figured I could get a few pointers and try to save him a few bucks.

I have been playing with the tune on my 99 camaro but I know its a little different on the trucks and six speed auto. Plus I have the master efi tuning book so I'm learning but it's slow

Thanks
Josh