I owned an '05 2500 Duramax, a '16 2500 6.0 gasser, and now a '22 3500 6.6 6 speed. The '22 is by far the quickest, and consistently gets around 16 mpg mixed driving. Unbelievably quiet as well.

Could you do a 6 month or 1yr expense comparison of actual long(ish) term fuel cost comparison with the 6.6 gas vs 6.6 Duramax? Your content is awesome and is helping me a ton with education and planning for my future truck purchase.

Man that dash is so sexy. Hopefully in 5 years Ill be able to afford one

As a life long GM owner and always owning gassers I finally bought the diesel in my 2022 AT4HD. I will absolutely never go back to gas. I get better fuel economy and more power than I could ever need, exhaust brake keeps the truck and trailers brakes cool. It just finds a gear and pulls anything I want up any grade. I live in Utah as well so finding something that can safely pull some of the grades we have was super important to me. 10k is a lot but they hold their value better. Love the videos!

JB please get a full tank of regular fuel, turn off traction control and stabilitrac and run 0-60

Thank you for bringing up the build quality differences. Not that GM has never had that problem, but overall it is superior in my humble opinion

14.7 mpg is great for gasser 3500. The 2013 2500 & 2016 2500 GMC’s I had never got more than 11.4 mpg when not towing. You’re getting almost 15mpg in a 3500 that is great mpg not towing brother. It is meant to tow and haul not drag. Enjoyed the mpg review.

In my last comment I forgot to add I do enjoy watching your videos and reviews keep them coming.

Great video. I'm getting 15.5 MPG mixed stop and go and highway driving and 9.4 towing our 32' 7k lbs travel trailer with my 2024. Not bad for a gasser. The Allison 10 speed makes all the difference in the world.

Dude, how is 401 HP not enough? - I remember when you could get a 250 straight six in a 2500… we thought the 210-hp 454 smog motor was a tow monster- and a turbo 400 transmission you had to rebuild every 75,000 miles if you worked it.

My allison 6sp will hit 235 on the hills... sometimes more.. when I have 20K lbs of 5th wheel behind it. 185 is nothing. It's basically matching coolant temp which is fairly normal after the truck has been fully warmed up driving.

Thats not bad. My 2007 5.3L 1500 gets about that in the city. Obviously this is a lot newer truck, but its also much bigger. My 1500 is a very similar size to a jeep gladiator.

Nice video. That’s a pretty reasonable fuel mileage expectation considering the conditions you were in and the fact guy were cruising on 80 mph for awhile lol. Also my experience with the computer is that it’s dead on if you get fuel the same day. It gets off a little bit over the course of a week or so especially if the driving conditions change. Like for example I was on 8.1 when I got home from the races and now I’m at 10.5 or something after driving a couple days even though my last 50 mile average is around 15 lol. I’d like to hear the mrs’s take on the new truck, especially compared to the 2023. The online hate is a real thing because that’s not what happens in the real world. Also, your 0-30 improved that time a little. I’m a little more convinced now that it’s just a combination of the extra drag from the dual alternators and the fact that you’re loaded with every option. And there is a possibility the 91 octane is hurting your performance. You have less air at the higher elevation and the higher octane fuel is slightly harder to combust so there is a chance you are losing a little power. You may have your air to fuel mix off by doing this more so than normal that the elevation is causing. Again, pure speculation on my part because there’s a lot more to it then just what I said. And naturally you’re going to be creating a lean condition being at a higher elevation so it stands to reason you need more octane to avoid detonation but there also why the higher elevation parts of the country have 85 octane as an option for regular fuel. Personally I’d just run 87 in it.

Bring back the 4:10 axle ratio with the gasser Alison combo. I believe you mentioned from a previous video that the High Country has 3:73s?

I went and looked at a 2023 Ram 2500 and it was nice until I looked at the sunroof shade and it was pathetically cheap and flimsy- it really blew my mind that they’d skimp out on that of all things.

General Motors also has a 500 mile break in. To where you’re not supposed to accelerate fast or brake hard during that time.

Once you tune it it's a world of difference and it runs as if you would expect it too

I can also tell by your 30second method you watch TFL truck and or TFL car they’re out of Colorado lol

May I offer a few of my thoughts related to the 6.6 gas? I have a 2022 Chevy 2500 HD. Crew cab. Short bed & Z71 package. 6 speed 3.73 gears. -my truck felt sluggish & the transmission was a bit rough. After about 2k miles it began to run & shift better. -401 hp & 460 torque are respectable numbers. Not to far off the diesel pickups of 10 years ago. -Comparing modern HD gas vs Diesel is not a fair comparison. Apples & Oranges. -If you tow 15,000# or less and it’s 3-4 times a month then a HD gas might be for you. -Living in North Texas, the altitude is not an issue. My gasser pulled about 12,500# (loaded trailer) with ease. -IMHO, you buy a HD truck to haul & pull. Therefore getting the job done safely & reliably trumps 0-60 runs. -i run 87 / Regular in my truck and it does fine. Just my opinion. Enjoy your videos. I think you will be more comfortable with the gas engine when it has a few more miles on it.

We should do a collaboration. I just took delivery of my 23 silverado 3500 6.6 gas (6 speed). Just here in Utah county 😊

Not bad fuel economy for a big gasser but honestly a cold air intake and a cat back exhaust might help in the power department a bit and high flow manifolds and high flow cats would probably help a bit too

Compare the 6.6 gas with the older 6.0 HD ratings and its good power. I used to have an 05 6.0 HD gas and it would get 11-12 mpg mixed empty driving and it was slow. The 2005 HD was way lighter / lower tow rated than todays model. For the new truck to beat it on power, capability, and MPG is really good.

Hi JB, I noticed that the camera view was a little off. probably not intentional. just wanted you to know. great video

Great video Brother....hand calculated vs computer is dead on..impressive. You got me wondering if I should change my 24 Super Duty order to a 7.3l. I'm loving this 6.7l HO so far though!!

Great Video an information 👍

Unless I was consistently towing very heavy. I would be hard pressed to buy a new diesel. The gas engines are solid. The new 6.6 gas is a big upgrade from the 6.0 gas. Obviously with the weight of the truck, the mpg will never be good. The diesels do not do well unless they are run hard and up to operating temps. Otherwise the dpf and egr system has issues. The gasser getting the Allison behind it is a game changer. Well done review.

JB I have a 2023 Silverado with the 6.2 L and they highly recommend 91 or higher. I put 93 octane in it and people tell me it will run fine on 87. I’m not willing to take that chance I’m not sure what you think since you review a lot of these trucks.

Towing from North Texas to Gatlinburg TN next week with my new 2500 gasser. Dropping down from a Cummins diesel because of the issues that come with a diesel. Very curious to see how it handles going down hills pulling 9k

Very nice review. Thank You!

I do 80 rear and 60 front in my SRW 3500

You're also at 5000+ feet. That truck is down at least 15% from what most people will experience. 400-15%=340hp.

I think Whipple is going to offer a supercharger kit for the 6.6's. Granted, it's probably going to be 7-10 grand.

plus long tube headers and high flow cats and MSD coils and wires and cold air kit

Higher octain fuel is harder to burn, that is the reason it was used in high compression engines in the past, it prevented detonation(premature ignition in the cylinders which was known as engine knock). Todays computer controlled engines are much better at adjusting the ignition advance than the old mechanical systems they replaced which is why more powerful engines today can run on 87 octain.

I love all of your content. I really Hope you buy Ford 7.3 at some point. I’m Looking forwarding to your reviews on it.

There are no states where it's legal to remove emissions equipment it is federally illegal to remove emissions equipment

My 2 cents is perhaps putting premium gas is causing worse acceleration. I've seen this happen in small engines...basically higher octane fuel causes more heat build up, computer sees this and scales things back. Put regular 87 into it as the manual states... Either way the gas is 20-30% less efficient than diesel, which cost 10-15% more depending on location, so it's like a 10% cost savings that would take forever to recoup since that cost +10k if you look at it that way, which IMO isn't a good perspective. A diesel truck can more comfortably and safely tow, has longer range, and you'll get most of your money back on resale. Everyone will agree a diesel truck is better and the only complaints are paying more upfront and dealing with the emissions crap. There is a strong argument for this gas truck...on paper, this 6.6 gas engine will tow everyone most non-commercial users need. Put it into a basic regular cab few options work truck, it should be able to handle moving 15k even better. IMO most people who buy these high option 4 door short bed trucks are mostly driving it around empty like an open back SUV and doing so to meet a need to occasionally tow. The gas engine would handle that just fine...yes it's not going to win 0-60 runs but who the heck cares as no truck is made for that. You drive it like a big heavy duty truck...not a SUV, not a sedan, not a sports car, not even as a full size truck. So stupid seeing people tailgating and driving these trucks around as if they're normal cars.

Wish they could put that engine on the 1500 models dam i remember the vortex max days truck ran hard and tons of power to spare

Install the l8p gm camshaft. 523hp and 543 ftlbs

In turms of deleteing one tou should check if your state does emissions checks (also known as smog checks) and two if you delete the egr doesn't have to come out you can shut that valve permanently and never have to worry about it the dpf and the def yeah that has to go but i. Turms of the 2024 model year their are not any tuners avalibke yet it may be a while until that happens especially since gm did the swap on the cpu it is now a flobal be smart computer so tuning is gonna be a lot diefferent then previous years

I’m waiting on the ZR2 and I will get the gas version.

Good Video JB. I find it mind blowing that my 2005 Ram 2500 5.7 HEMI QUAD 4X4 Gets 15/16.3 on the road with a 5 speed automatic transmission. And these Uber expensive new trucks don't get much better mpg. if any. Wow

That mpg is as good as a 5.7L Tundra.

Is the 2024 Chevrolet 3500 HC 6.6L Gas better than the 2023 Ram 3500 6.4 Gas?

Just get a pedal commander throttle response will wake up make you fill like it has a tune

There are no delete friendly states my man it’s a federal thing which sucks, honestly considering selling my diesel because of the epa bs, I seen state troopers enforcing emissions too

I run 60 psi all round it’s so rough if they have more psi

How do the camera views at night appear any glare from auto's passing on the dash screen or is it fairly clear.

This octane issue doesn't seem to want to go away. Is there any merritt here. I do know as a dirt biker i use 93 octane near sea level and 85 octane when at 6000ft and above. I do not feel any power loss at elevation when doing this. If somone out there has any science behind this, we can finally lay this to bed....

I test drove one of these gassers. They just dont compare at all to the diesel power and the driving experience. Better fuel economy in the diesel. better resale. If you do your own services on the diesel its very minimal extra cost, especially when you consider the extra mileage you get out each oil service. I'll be hard pressed to ever get another gassser. Appreciate the videos!

Does this transmission have a thermostat like the previous generation?

Is this engine a ‘displacement on demand’ engine?

Yeah, you want to take that truck in for service I would up the transmission about 10,000 more heavier to transmission

Really nice truck but I'll keepy Titan :)

Yo where in the us is this place , it looks nice 👌

I’d raffle this Government Motors product off to a subscriber.

Same MPG as the 6 speed. Should’ve mated 4.10 gear with the 10 speed to overcome .63 10th gear ratio that is too damn tall. Gas engines in a 7300 lb truck need to breath and spin free not be under load.

When we buy a heavy duty truck do we really care about 0-60 times? Real world MPG: My 2024 HD 2500 Silverado just reached 1600 miles; mostly short trips, no towing but often with a load of firewood. Trip computer indicates12.5mpg average with best 50 miles at 16.6. Sort of what I expected and I didn't need 20 minutes to watch this guy ramble on. Gas versus diesel my take: If you average 4mpg better overall with the diesel and it costs $1 more per gallon, as it does where I live, 80,000 miles (give or take) is necessary with the diesel to break even with fuel cost not including DEF or higher maintenance costs and now we have to make up the $9400 premium for the engine. I tow boats with a company truck (diesel) and I love the torque but for my personal vehicle I just can not justify the cost difference.

I’m sorry but I would I challenge you to show data where putting 91 in it makes it perform any better than 87. If you understand octane, you would understand that there is zero benefit to running higher than recommended octane. Most people ignore this and put what they want in it and that’s their prerogative but at the end of the day it’s fact

The Ford 10 speed and Chevy 10 speed is the exact same transmission. Not an Allison.

Cold Air Inductions intake and a good exhaust. Maybe a tune after that. Huge gains to be had. Jus' sayin'.

185 degrees out of an Allison…. Hold my beer bud!

What app do you use for the speed test?

put a pedal commander and it should be better

do you have really bad play in steering wheel? my gmc does only 250 miles taking it to dealer tomorrow

What is an HC 3500? (that's what your title says)

Wide open throttle 80% rpm

Non ethanol gas would be the way to go . You’ll go farther

Dude stop saying 180 degrees is hot that is normal 230 is but not 180

0 to97 mpg

Those 6.6 gas trucks are dogs. Chevy should offer a steeper rear end gear for those trucks too. That would help.

Put 65k miles on a L8T wide open throttle a lot 11mpg and ram only 87. Never had an issue. Also no issue with your truck they are very slow.

It's tons of states for weight loss program. Just gotta do your homework.

That truck is slow! I have 22 model 6 speed with 37 inch tires and I can smoke you.😊

Oh my god this is such a stupid stupid thing there’s really people out there putting premium fuel in a work truck 6.6 L gas motor? Bro just like I said, in the last video you made about running ethanol, free fuel and high octane fuel it does nothing and in Laymans terms ethanol free fuel is why boaters use it because it is in a motor that is in water all the time and ethanol attracts moisture and won’t break down plastic parts, like fuel with ethanol would do in an inboard and outboard motor. 91 and 93, octane etc. 94 octane if your local Sunoco station has it does absolutely nothing unless you have a big block high compression motor or forced induction motor or turbo charged or it has a massive Kenny Bell supercharger on it like my 13 GT500 running high octane fuel in your work truck does absolutely nothing and in the long term could actually damage your motor because your motor was not designed for that like the Corvette is, for example. High octane fuel is needed. When you mess with timing compression detonation forced induction. Other than that the only reason you would run high octane fuel. For example, in an older motor would be for engine, knock, and noise. Your local mechanic may tell you say you have a 98 cutlass and it has a little knock to it they’ll tell you run 93 in it Because it has a detonation issue or a timing issue and it would limp you along temporarily

Spending $80k + on a truck, I expect it to be a god damn race truck