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02'-06' Avalanche Owners....How's YOUR Gas Mileage?

I get crappy mileage. I have tried doing everything suggested and I get 10-13 mpg. I can tow my enclosed trailer or just drive and it does not seem to matter. I can drive at 60 mph to 75mph and I get 10-13 mph. I can drive in town and get 10-13 mph. Granted I have a 6 inch lift and run 35 mud terrains so that has a lot to do with it. I get 15 -20 mpg in my 3/4Ton with a 6.0 so I don't get it. What I do know is I love my Avalanche and I get compliments on it every time I drive it. For a 20 year old rig she looks good and runs great. I don't see parting with her for quite some time. I will say when the motor does tire out I will replace it with a 6.0 or build a stroker motor for it. It might as well have the power if it is going to have bad gas mileage.
 
03 2500 with 115K miles. I get 12-13 on the highway. In town? I dont want to know!

Will be interesting to see if the mpg improves once the Blackbear tune is complete.
 
I get crappy mileage. I have tried doing everything suggested and I get 10-13 mpg. I can tow my enclosed trailer or just drive and it does not seem to matter. I can drive at 60 mph to 75mph and I get 10-13 mph. I can drive in town and get 10-13 mph. Granted I have a 6 inch lift and run 35 mud terrains so that has a lot to do with it. I get 15 -20 mpg in my 3/4Ton with a 6.0 so I don't get it. What I do know is I love my Avalanche and I get compliments on it every time I drive it. For a 20 year old rig she looks good and runs great. I don't see parting with her for quite some time. I will say when the motor does tire out I will replace it with a 6.0 or build a stroker motor for it. It might as well have the power if it is going to have bad gas mileage.

Are you on stock gears? What ratio? 3.73?
 
I get 10-11 mpg when all my trips for a tank are a few miles or so, which is most of the time for me. When I do highway driving, if 100% I get about 19 mpg, if mixed, I'll get around 14-16 mpg depending on the mix. All 87 octane, z71 1500 4x4 2003.
 
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