fredkj3

iTrader: (1)

just got a 6.2 CC wit 3.42s... bone stock

so far it gets about 14 around town if i try to stay out of it... i got 20mpg the other day on a trip that was about 60 miles... it has like no red lights... 65 the whole time

avg around town and stop go it stays between 13 and 14...

but if i drive stupid... i have gotten 10mpg before......

CJ Hungus

Justin usually asks if you want the AFM kept on or turned off.... so you had to have told him you wanted it off.

Red04Silverado

iTrader: (2)

4.8 with 3.73 gear all stock besides a 4/7 drop average MPG is 19.

Wonderer876

Small lift extended cab 5.3 4L the highest i have ever got is now at 12.8mpg about 320 a tank.

295-70-17 all terrains with mods in sig. lift is only 3" now above a level front end.

Dark Halo

iTrader: (14)

Same here my turd 08 4x4 z71 5.3 with 4 speed 3.73 small lift and 33's I get 12.3-14 mostly highway. I'm not sure what to do myself my daily drive is about 150-180 miles. GM used to have great fuel mileage I wonder what happened.

Razorback Randy

lmao - my turd. I don't drive that far to work but I only get about 12.5 in town and 14-14.5 on the highway. I am running 285/55/20 with a 4 speed trans, 6.0 max, and 4.10 gears. Oh yeah its a cc and has a leveling kit, brush guard, step rails, and tool box.

PathfinderJr

iTrader: (6)

Wow. When my truck had the 5-spd I'd get dang near 23 mpg on the highway doing 65 in my 2/4 dropped rcsb with the 4.8. Guess I'm lucky..

KHester84

If your speedo reading is off (reads slower) because of bigger tires, you will see less MPG since the computer is logging less miles for every gallon burned. Maybe that is messing with your readings.

Razorback Randy

You can go to this site http://www.1010tires.com/tiresizecalculator.asp and punch in your factory tire size and your new tire size and see the difference. Unless you go a good bit large there is really not that much of a difference. I have checked before and factory tires vs. my 285/55/20 are only about 2% difference. So if I was getting 14mpg with factory tires and swapped to my new ones (assuming everything else stays the same - weight,etc) My truck would now show that I was getting 13.72MPG.

01Blue4.8

I've been getting 21 ish mpg in my silverado in town. My mileage increased 4-5 after I got my tune, pulley, and efans.