average fuel economy?

[donut slayer]

Usually if I am taking it fairly easy i just keep it below 2k rpm. But I agree highway on ramps are fun.

Thats how I got my best MPG, keep it under 2k rpms. Drive it like you have a egg between your foot and the skinny pedal.

 

[oh1yukonslt]

Buddy has the 8.1 in and 01 2500 and he has it tuned and most of the same mods as me and he gets 14 all the time no matter how he drives it.

Yeah I need to get a tune on her. If I got 14 all the time I would be happy with that. And do some mods. Wanting a better exhaust and intake but I was told more/better air flow means more fuel consumption and more HP. Hp is fine for me it will break the tires loose just by punching the pedal at a stand still. (Was pissed at my boss and took it out on my pedal) What kind of tune does he have? Wanting to get a Blackbear one day soon.

 

[felixgun]

i have airaid intake tube and bb tune on esky 6.2 and it didn't do shit to my mpgs

 

[jbancs]

I just bought my tahoe and I've gotten roughly 14 on all three tanks I've run so far. I'm doing mainly city driving.

 

[01ssreda4]

How accurate is the mpg reading on the dash?

 

[redemn93]

ive found my 04 denali is about 0.5-0.75 optimistic. not horrible i guess.

 

[SnowBuck]

2005 Yukon XL SLT. Solid 19mpg highway (drive MD-to-Jersey thru DE weekly). Set cruise on 60mph and don't touch it. Set a record 22 once. Better mileage then my Cherokee and a heckofa lot more comfortable! Stop & go city - another story.

 

[ccapehartusarmyINF.(ret)]

i just went on a long road trip and i got 15 to 16 and i drove mostly 70 to 80 mph

 

[mattluttrell]

I'm getting 11.2 hauling this beast. I'm happy.

 

[Blind Prophet]

02 Z71 tahoe getting about 16.5 50/50 city and interstate

 

[bret04yuk]

Well the 6.0 and the 5.3 get different mpg. And tune, clean air, clean TB, clean injectors make worlds of diff.

Look at me. I'm lifted on 35s and getting stock dealer spec economy now.

^ wow! im jealous, 1. of your rig.....DAMN! and 2. 16mpgs! i will baby the heck out of my yukon 5.3 (55mph) actually takes some self control and patience, also kind of fun pissing off everyone who flys everywhere at 90, and the best i have ever achieved at 55-15.8mpg, 65-15.2, and 70-14mpg. should i do the full round tune up? and any other solutions that will get me to near 18?

 

[jdpber]

First check your compression and plugs, that is the best starting point. Then run an additive to burn off and deposits on the injectors and valves. I use Lucas fuel treatment every other fuel up. How you leave the stop matters also, tune always helps. But it is a lot of little gains adding up. No one instant fix.

 

[dhulsey779]

I'm averaging 16-18 in the city & 19-22 on the highway. Now I only have done a few mods like the K&N CAI, & MBRP CAT Back exhaust. Still stock height with 20"rims, but hopefully when I lower the truck with NorcallSS 2/3 belltech drop kit I gain a few more. Not sure who said it but 60MPH is the sweet spot on these. Although I see tunes from BB / Superchips on these hoe's, doesn't seem to me that you gain fuel MPG really but I could be wrong.

 

[mattluttrell]

I agree. I think I could hit 21mpg if I cruised at 60 an entire trip.

 

[jdpber]

68 is my sweet spot for my 35s if flat hwy I'm 21. And that's damn happy for as big as I am. And slinging big mass around. My tune helped a lot. We also did a lot of trans tuning for shift points and mapping. And hours of engine tuning. The from the first tune till now (all 87octane) we have gained 3.6mpg average since we started fine tubing things.

Buddy now is working on a 90s 6.2 c/k diesel and it is about to be torn completely down and ground up build. Goal is 20s which is a push for these old Detroit irons.

Best bud who is doing the tuning with me. He has my lil brothers 07 ECSB 2wd stock on 31 getting 17/23 stock gears. I know a lot lighter than the Tahoe. But still and that's a baseline tune. Not as much time invested as my truck. And 18" factorys