5.3L Average Gas Mileage Poll

[Faded]

Please remember to list: mods, city/highway percentage, tire size if different from stock, gear ratio, 2wd or 4wd, driving habits, etc.

[Faded]

Box stock tires and everything, 4.10's and 4wd I'm getting 12.8's consistently in town mixed with short freeway trips at 70ish mph. This is driving like a have a dozen eggs between my foot and the gas pedal, plenty of coasting and the least possible amount of idling short of turning the thing off at every stop light. I know, it's a truck and it's not suppose to be great on gas, but I see others posting 15+ MPG and I'm curious how they're doing it. I'm starting to wonder if I have something wrong...

[Dkgrmtls2004]

16-19

2004 ECSB 2wd, 3.42, stock everything, 50/50 city/highway

 

This is driving like a have a dozen eggs between my foot and the gas pedal, plenty of coasting and the least possible amount of idling short of turning the thing off at every stop light

 

I drive this way also

[R Dogg 56]

14.6-16.5. Mixed driving styles, and mixed road conditions.

[tnord]

14.5-14.75mpg consistantly, so i voted for the 14.6+ category.

 

100,000 miles, 4x4, Z71, K&N, some sorta oversized off-road derivative tire that the guy before me had, probably 60/40 city/highway, pretty avg driving habits, cruise at 75mph on highway.

 

i have an exhaust leak that can't be helping things, and probably a fuel pressure regulator that isn't helping either. if i fix those things and had better tires i'd probably be 15.5mpg+

[ZZebes]

10-12 in city

18-25 on Highway

 

2006 EC Short Box, 3.23, Magnaflow Muffler, 75/25 City/Highway

 

Drive it like i stole it everyday

[nvrenf]

Bone stock 5.3, stock 265/75R17 tires, 3.42 gears and 4wd.

 

14-15mpg in town and 17-18 on the highway.

[opsbear7]

13.3mpg average...bone stock 5.3L, 3.73 Gears, Stock 265's, Z71, No performance enhancers...

 

I have a heavy foot off the line though.

[rmreid]

'06- 1300 miles with 5.3/3.42 gears/ Z71/265-70-17/90% City driving/15.8mpg/Extang Trifecta bed cover

[C & A s Dad]

02 Yukon XL 5.3L 4.10 gears. Mixed driving by my wife has been getting from a low of 16.5 to a high of 18.6. The average has been 17.2 until I added True Flow's cold air intake and filter. Have not had it long enough to get a real good read but the prelims are showing low 18s will be the average. Not bad for a big bertha with 4.10s.

 

By the way, the True Flow is 100% quality. It fits and looks terrific and you can feel the difference beginning around 2500 to 2800 all the way up. Makes a little intake music under heavy throttle but otherwise, you cannot hear it.

[DivideGMC]

2006 GMC, 354 rear end, stock 265/70 17's, AEM intake, Magnaflow muffler, stock exhaust pipes, 10,000 miles.

 

16.5 - 18.5mpg.

 

60% higway / 40%city. Driving from 9,000 ft to 5,000 every day.

 

Mike

[pm26]

'06 crew cab Z71, 5.3, 3.73 gears, stock everything, about 13-14 city, 15-16 highway when driving conservatively.

[macssuck]

16 according to the DIC. Completely Stock 20's 2wd 3.73 daily 60mi. round trip freeway commute somewhat heavy foot around town. If i just drive in town it drops to 13 or so.

[bowtie_pasta]

'06 Tahoe, stock, 3.42 rear, 4x4...highest DIC has ever read is 13.1. I hoping this improves as the engine breaks-in.

[HuggerOrangeZ71]

2005 extended cab sportside box, z71 4x4, 310hp 5.3, 3.42's, stock tires, flowmaster muffler with dual rear exits. i get about 12.5-14.5 around town and 17-18 on the highway. 3000 miles so far.