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Old 09-21-2021, 08:39 AM   #1
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Mpg for a 2500 Silverado 6.0

Currently using an 04 1500 with the 4.8, pulling about 4000 pounds but the payload is over 1000 so I am getting close to the limit. We are getting 11 towing which is decent IMHO. But we are looking at upgrading the trailer to something around 6-7K so the truck will need to be upgraded. Found a nice 06 2500 with the 6.0 but was taken back by the non towing rating of 10MPG. What can I expect from this rig when loaded and pulling?
I know mpg for RVers is not really a relevant issue but still need to put numbers in the budget.
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Old 09-21-2021, 09:38 AM   #2
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The mileage sounds about right for towing, maybe a bit higher than you'll find in real life.
The 6.0 is pretty much rock solid, but the design of the engine was to find a good point were it's running either close to the max HP curve or close to the highest Torque band.
Then somewhere round 2011, they started putting 4.10 rear ends under them. The lower number sure helped on take off, but it did a real number on mileage.
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Old 09-21-2021, 01:55 PM   #3
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My 2011 3500 4x4 dually has gotten a record best 14.1l/100km driven like a grandpa under 100km/h. At 100-105km/h gets 14.5-14.7l/100km and it'll climb to 15.0 to 15.3l/100km from 110km/h to 115 km/h. All this is unladen, of course, except for the extra fuel tank and fuel plus the crap in the toolbox. Figure 8000lbs with me behind the wheel.

I imagine an older one without the 6 speed will fare worse, maybe 13 to 16l/100km depending how it's driven and the configuration.
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Old 09-21-2021, 02:00 PM   #4
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Towing..........10 mph
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Old 09-21-2021, 05:06 PM   #5
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not towing you can expect 11~13 mpg depending on how fast your driving. With 4:10 in the drive axle the motor gets a little busy over 70 mph , it has no problem going much faster just expect the fuel tank to drain fast. The truck is over 7000 empty so its not going to feel as light as a 1/2 ton.
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Old 09-21-2021, 08:04 PM   #6
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My 2015 2500 6.0 4.10 gets 13 mpg mixed highway/city driving. Best I have ever seen is 14 mpg on the highway over a 1,000 mile trip in the Midwest. Truck weighs 7,200 lbs empty.

Towing is terrible. 7 mpg pulling my 10k 5er in mild SW OH hills. Its favorite RPM is 4,000+. I spend a lot of time floored.

Snug in behind a big rig and you might see 8 mpg. Downhill. With a tailwind.

At least it has a 36 gallon tank.
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Old 09-22-2021, 05:08 AM   #7
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My 2015 2500 6.0 4.10 gets 13 mpg mixed highway/city driving. Best I have ever seen is 14 mpg on the highway over a 1,000 mile trip in the Midwest. Truck weighs 7,200 lbs empty.

Towing is terrible. 7 mpg pulling my 10k 5er in mild SW OH hills. Its favorite RPM is 4,000+. I spend a lot of time floored.
That must be why your mileage is so poor. I do way better than that with 2 extra wheels, 800 extra pounds on the truck and a much heavier 5er.
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Old 09-22-2021, 06:52 AM   #8
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Thanks to all. I was concerned about the thirst of the 6.0, apparently the concerns are justified. We are planning an extended trip in the fall, should be interesting if the current rig meets our needs. Based on this info I am hoping it does!
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Old 09-22-2021, 10:11 AM   #9
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Currently using an 04 1500 with the 4.8, pulling about 4000 pounds but the payload is over 1000 so I am getting close to the limit. We are getting 11 towing which is decent IMHO. But we are looking at upgrading the trailer to something around 6-7K so the truck will need to be upgraded. Found a nice 06 2500 with the 6.0 but was taken back by the non towing rating of 10MPG. What can I expect from this rig when loaded and pulling?
I know mpg for RVers is not really a relevant issue but still need to put numbers in the budget.
Sorry, I had one a 6.0L gas and sold the truck. I bought a Diesel engine truck, when towing a wind brake, 13-6" tall 5er behind my tuck I normally see 11 to 13 MPG depending on speed and head wind.
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Old 09-22-2021, 01:06 PM   #10
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Sorry, I had one a 6.0L gas and sold the truck. I bought a Diesel engine truck, when towing a wind brake, 13-6" tall 5er behind my tuck I normally see 11 to 13 MPG depending on speed and head wind.
Yes and that's the rub. The cost of purchase for a diesel vs gas fuel consumption. This debate will continue and get bigger when electric trucks enter the game.
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Old 09-22-2021, 01:08 PM   #11
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Yes and that's the rub. The cost of purchase for a diesel vs gas fuel consumption. This debate will continue and get bigger when electric trucks enter the game.
A 350 hybrid truck would be the cat's meow. Plenty of torque, ok gas mileage and no oil burner maintenance.
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Old 09-22-2021, 04:41 PM   #12
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You will probably get about the same fuel mileage from any gas truck you pull it with. Your driving style and terrain has more to do with it than anything. If you are concerned about burning too much fuel, I would suggest you look into a larger fuel tank.

The important thing is to be comfortable with the truck you are pulling with. You donít want to be worn out after just a few hours of driving.

The 6.0 Chevy is a good motor and should serve you well.
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Old 09-29-2021, 09:08 AM   #13
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I have a 2006 2500HD with the 8.1 motor and 3.73 rear gears. Not towing I get 15 mpg , towing I get around 8-9.
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Old 09-30-2021, 06:38 AM   #14
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The 6.0 Chevy is bulletproof.
No active fuel management. AFM.
It's not the H.P. king but will run at 3500-4000 rpm all day long.
If you are worried about gas mileage you should get a pop up and a minivan.
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