Economy issue

[SethSwitch]

I would consider a tune. My milage sucked before I got my 2010 tuned because of the air intake and exhaust. My 22's and 3" lift don't help the fact but I can get 21mpg highway if I try to be a little more conservative. A tune will also give you better performance.

 

[dreww2001]

I would consider a tune. My milage sucked before I got my 2010 tuned because of the air intake and exhaust. My 22's and 3" lift don't help the fact but I can get 21mpg highway if I try to be a little more conservative. A tune will also give you better performance.

I will look into a black bear tune once i get my lift put on and body module repair paid off. Learned my lesson with cheaper parts.

 

[Tom Kelley]

When did you first notice your decreased fuel mileage? If it's something you've always had, you might consider checking your gear ratio, some of these models came with a 3:08 and some with a 3:42, the 3:42 being for towing etc. Also, have you changed your wheel size from the OEM size?

 

[Contend997]

So what does your shop think about your fuel economy???

What size tire do you have on the tahoe. That could be a thing might have to change the gears in the truck or get smaller tires

 

[88m53453]

Heck our 03 2wd Tahoe with a 5.3 gets 20 all day long on the highway and if careful, about 22. Running a tune. The 15 Silvy 2wd CC gets 22 average with mixed driving easily. I've seen 25 on a tank in straight highway driving, no tune on it, yet.. Neither has seen less than 17 in about 300k of driving

 

[dreww2001]

When did you first notice your decreased fuel mileage? If it's something you've always had, you might consider checking your gear ratio, some of these models came with a 3:08 and some with a 3:42, the 3:42 being for towing etc. Also, have you changed your wheel size from the OEM size?

What size tire do you have on the tahoe. That could be a thing might have to change the gears in the truck or get smaller tires

It came with 20s from the factory, got 22s a few years ago but its the same size as factory 22s. i have 20x10s sitting in the garage now.

 

[Contend997]

It came with 20s from the factory, got 22s a few years ago but its the same size as factory 22s. i have 20x10s sitting in the garage now.

Your rim size won't matter it's your tire size that matters the most.