Gas Mileage?

[SteelBoss6.2]

I have a 2021 5.3 and I am getting 9 MPG towing a 20' bass boat.

Hahahha wow. Well these things aren't really meant to tow much

 

[rhinoboss]

haha, yea, sucks. Guess it's better than paying double in cost for diesel. Hopefully, it's a wash.

 

[SteelBoss6.2]

Sold my duramax for the Boss...love diesels but I couldn't afford the 80k OTD for a new one and im not towing much as of now

 

[Avianhunt]

2021 5.3L 2644 miles 16.3mpg avg. 50/50 city/hwy driving.

 

[tbuss5831]

2021 6.2 10spd has 800miles on the odo I average 15.8mpg using the 25mile range guesstimator. I am about 40/60 city/hwy for my work commute.

 

[SteelBoss6.2]

2021 6.2 10spd has 800miles on the odo I average 15.8mpg using the 25mile range guesstimator. I am about 40/60 city/hwy for my work commute.

I'm probably 70/30 city/hwy and my average according to the dash is mid 13 ?. Ive never seen it go higher since I've owned it.

 

[jodaday]

2021 5.3, just hit 1,100 miles...I have averaged 17, primarily country roads...very few stops and not much traffic.

 

[MikesTrophyTruck]

seriously!?
6.2 10spd Performance Package. 532 miles. AS off and Sport mode as soon as I start driving.
15.3 75+ highway
13.2 Very aggressive in city driving.

I thought my tuned 2019 ZR2 was fun! the TB shifts like a frickin race car, and the sound it makes is pure pleasure to my ears!

UPDATE:

Now have 2100 miles 16.7 all around and 20.4 on a road trip to Yreka and back to Yuba City.

My regular route to mining claim was 13.2 up and got 27.6 coming down! (That was recorded at 835 miles)

 

[Sadams7979]

I have the 5.3 and I'm rolling on 35's. I get about 15.5. I think that's pretty decent considering the tires.

 

[Frombieman]

2020 TB 6.2 with 295/18 tires, just turned 7000 miles. Averaging 16.4/gallon running 93 Oct. Aggressive driving. Started to improve around 6000 miles

 

[vezePilot]

How do you guys drive?!? Didjya STEAL the truck or did you buy it? Some getting 16 or 17 ... ?

I'm getting 18 to 20 MPG, half & half city/ highway, in a 2021 5.3L Custom Trail Boss.

 

[JustJohn8511]

2021 6.2 with stock tires. Just under 1k miles, and I've averaged 16.8, with about 80/20 city/hwy. I only really "get on it," once in a while, but I do get on it. I don't go out of my way to drive like granny, but I resist the constant urge to make the 6.2 sing. I traded in a 2015 Tundra, so this is a significant improvement on both MPG and power/torque.

 

[Spyderwebb]

20 6.2, stock with the exception of CAI and AutoStop and I pretty consistently see 16, mostly in-town driving, on the highway I gain a few. Granted, I drive aggressively.... love the power!

 

[Jmzvet]

5.3 on 34in tires with a hard bed cover.
About 2000 miles with 70% of that on the freeway. Im right at 17.5mpg

 

[NCRob]

After leveling with 35’s. . . I’m honestly afraid to look. HA!