I recently got my 07 Sierra 5.3 tuned at HPE.

When I had pulled trailers in the past I averaged about 9-10mpg on 22" wheels. I've gone from those to some heavier 20" wheels with BFG All-Terrains.

I pulled a trailer last weekend with a full size car, and had a Yamaha Grizzly 700 in the back of the truck. The 4-wheeler probably weighs in at about 750lbs, the car was about 2500 and the trailer about 1500. I averaged 13-14mpg!

Just wanted to share.

 

great gains. Isn't it amazing what you can do with a computer these days, lol

 

Better then all day adjusting the fuel rod depth on a Q-jet to get the mixture in just right.

 

That's sweet I hope to see my truck go from 20 to 22mpg unloaded this week

 

my buddy and i tuned it and aren't done yet. my mileage is about the same i got 19.47mpg mixed driving with a 3000 stall and i have a lead foot. i got about 20 or little better before the converter and tune but i picked up about 2.5 tenths and 2 mph in the eighth

 

Horsepower Engineering.

281-477-3100, talk to Chuck and tell him Stephen sent you. I think they can do mail-order tunes too.