thanks, I will try... [sm=smiley20.gif]

 

I will do it too. I took it in at 500 miles and they sent me away.

Thx Dennis

 

Only getting 13.5mpg driving conservetivly. Thought it would do better. Hopefully the intake and exhaust will help.

 

i didn't vote, 'cuz that would screw up the curve. one thing to note though, bigger tires on a stock computer are going to throw off both the odometer and speedometer, thereby hosing the mileage on the computer. the H3 doesn't have a programmer available yet to update for the larger tires, and GM can't/won't do it for you. i noticed a drop from 11.5 to 8 when i went from the stock 35" to 37" tires, but once i reprogrammed the computer, i'm back to 11.5 again. your wheel travels further with each revolution now, so when you've gone a mile, your computer thinks you've gone less than a mile. but, you've used the same amount of gas as a mile travelled on your old, smaller tires. the only way to compare mileage from stock tires to larger tires would be to drive between 2 set points on a tank of gas, fill your tank, drive it again, refill and see if the amount is the same. or, you could harass the programmer manufacturers into getting off their lazy a$$es and making a programmer for the H3.

my mileage should be getting better though, i took out my 20lb air filter today. the filter weighs about a pound, the dirt and gravel that was in it was an additional 19.

i don't know if the H3 offers an "instant mileage" display or not, but once you see 2 MPG, you stop looking at it . . . .[sm=boosign.gif]

 

I am averaging about 17 mpg and its about 60 /40 city/highway

 

No it doesn't [:@].

Mine has been pretty steady at ~15mpg. But I didn't buy a Hummer for the gas mileage.

 

ok, I just talked to someone at my dealer service department and the guy said they don't have any calibration for the H3's, even 32's to 33's!

 

i did, but mainly for the crappy mileage. the faster i use up the fossil fuels, the faster science will come up with renewable energy sources.

dealers are lying to you when they say they don't have a way to reprogram for larger tires, they're not willing, based on some kind of safety/EPA/legal crapola. find a friendly mechanic with a tech II programmer, and i bet he/she could make it happen.

 

See, now that was my thinking too. I just didn't think anyone else would buy it.

 

thanks...and guess who my dealer is????