redramair98

iTrader: (74)

thinkin about getting a new truck, my avalanche gets 11 to 13 and i hera the new trucks get alot better, i was thinking a 5.3 anyone give me some advice

fatdog41

With a 5.3, I get 17.5 to 18 mpg using the a/c. Mix of freeway and city streets.

chevrolade

iTrader: (22)

14 In City 19 Hwy-on 4.8

Leroy_454

Mine gets around 15 mpg in windy highway driving, and around 17-19 interstate no wind. The old body style trucks seem to get better mileage. I think the aero dynamics and tune sucks in the new trucks. The AFM crap does me no good unless going downhill or coasting.

redramair98

iTrader: (74)

i wonder why the truk i have now gets so poorly i even did a 600 mile trip and on the highway its only 14

SpoolinChevy

Did you do alot of idling maybe? Or drive up alot of hills?

slw ls1

iTrader: (6)

Straight city I'm averaging about 15.5-16mpg. I havn't taken a highway trip with it yet so I don't know what I'll get on the highway. Mine's a 4.8 though, wish I had the 5.3, but they didn't have any in stock and I didn't want to wait for a dealer trade.

L7 Sierra

I get up to 22 hmy, and what seems like about 16-18 city, but I have done some of the bolt-ons.

I was getting 15 city- 18 hwy stock.

I also have the stock steel 17's, and probably will just get aluminum 17's to keep the mpg high. I drive alot so its very important to me to get the best mpg. last year I did 40K miles just for work.

xchevyx24

i have got 24.3 driving 60 miles to my moms and back 3 times, the DoD tunning helps ALOT and i get around 15 city

BLACK04VHO

iTrader: (2)

13 in town and 15-16 on the highway. Even before the lift and tune I couldn't get better then 16.5 on the highway.