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  1. #1
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    Default 3.0 Duramax vs 6.2 gas (Sierra 1500)

    In the market for a 2020 1500 Sierra AT4. Anybody have one with the 3.0 or the 6.2 gas?
    Mileage is better with diesel but towing is better with the 6.2. I rarely tow anything but live in Stink'n but have a place in St Germain so i make that drive frequently. I drove a 3.0 and it had pretty good pep in sport mode.
    Just looking for some incite/input or even opinions. I'm a GM guy so won't be considering any of the competition.

    Thanks,
    Chris

  2. #2
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    If you can take all the emission equipment off the diesel at mile #1 then buy the diesel. Otherwise I would run. Even our new ambulances are getting gas motors now because of emission BS. The price of diesel at the pump will more than make up for the mileage gain. That and if you park in the garage you get to smell that diesel every time you fire it up. Emission or not. Diesel stink. For reference I sell farm machinery and have a pretty good experience with emissions components. On road stuff is WAAAAY worse than off road that I deal with. Even if I needed a 3/4 or 1 ton it would be gas. Unless you are going to work the snot out of it (heat) forget about diesels.

  3. #3
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    Dec 2011
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    Rhodes
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    Quote Originally Posted by slimcake View Post
    Even our new ambulances are getting gas motors now because of emission BS.
    We're buying gas school buses now as they are just that much cheaper to run than emissions-laden diesels.

    On my 4th newer diesel pickup. Previous 3 have all had emissions related issues, mostly DEF tank related, but also injector on one of them. Do not recommend owning one that is out of warranty.

  4. #4
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    Dec 2009
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    NE Pa
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    well as far as I know the new 3.0 diesel from GM<, is producing some very impressive MPG's that I fully think will off set any added fuel costs as long as diesel stays close to where things are at now, here in PA, and we have some of the HIGHEST fuel prices in the USA, the difference is about .30 cents a gallon! that ain;t that bad!
    YES emission products on new diesels SUCK, and they can have issue's
    but every part of a vehicle can have issue's and many are BIG ticket priced items
    try and price out a new electrical dash on a new vehicle, and they ALL have them! , there FAR from cheap!
    and heck NO NEW truck today is CHEAP, there all over priced
    so once out of warranty anything than go and be on your dime!
    its life , I have owned more gas motored trucks that had issue's that cost a chunk of change to fix past warranty and not talking LONG after warranty either but Just as soon!(3 trucks in row had major repairs at 37-38,000 miles just past the OEM 3 yr 36,000 deal!
    GAS motors too!

    My current 2016 diesel has been great NO issue's at all
    and I will NEVER open a HD truck with a GAS motor again, they just eat too much fuel when being used for WORK and they take a beating to do things a diesel will in the same situation!
    running one motor HARDER than can cause THAT motor to wear faster, its logical

    IF all these new diesels were major fails, they wouldn;t be selling them!

    and anyone that removed(deletes) all the mission crap, is right off the bat voiding a warranty on the truck(IF the dealer pushes things and well, many times it comes down to WHAT is wrong, as many thing outside reps have to approve and THEY will void a warranty if they see emission parts missing)
    there are countless diesel trucks out there with hundreds of thousands of miles problem free on emissions!
    I wouldn;t NOT buy one that has it, but I DO admit, I'd rather they didn;'t

    as for smell, new diesels do NOT smell like the older one's (or deleted one's), I never notice any off mine, if anything I smell the crappy DEF fluid more at start up , all the more so on cold days, more so in very COLD days where air seems to hold it about more!
    and my truck starts just fine in temps down to minus 30 I have parked it all night in! WITHOUT plugging it in!


    anyone considering a diesel SHOULD however read up on pro's and con's and make the call them-self, , but NOT out of fear of a failure(not to mention, SOME diesel motor trucks have longer warranty' , and on drive trail and motors and even emission parts are covered longer than basic other parts, my Mopar/Ram warranty on TRUCK is 3yr 36,000, yet warranty on drive trail/motor trans is 5x100,000,
    BUT on many emission parts its 7 yrs 70,000 miles and you can add coverage to 200,000 if you so desire to PAY for it on whole truck,a s I imagine all other OEM's offer like coverage options )

  5. #5
    Join Date
    Jan 2018
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    North Aurora, IL.
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    Default

    OK now I got it, that’s how you’re attracting so many bears from all over the woods, one bear looks at the other and says “Hey Yogi, follow me to that sweet succulent diesel smell, that’s where our human friend lives”

  6. #6
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    Dec 2009
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    NE Pa
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    Quote Originally Posted by snomoman View Post
    OK now I got it, that’s how you’re attracting so many bears from all over the woods, one bear looks at the other and says “Hey Yogi, follow me to that sweet succulent diesel smell, that’s where our human friend lives”
    HAHA< sorry to bust your bubble,. but I had bears here before I had diesels here , so, maybe not the diesel lure you think it is! HAHA!

  7. #7
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    Perhaps I should clarify. Diesels in things that work for a living=good. Diesels in things like cars and half ton pickups=not good. The emissions need heat. Going to get groceries or driving to work does not create enough heat for them to work properly. I have a dodge 5500 with a 19' steel roll back box that we use to deliver skidloaders and tractors and pull big implements. Heavy stuff. Loaded all the time. 90,000 miles on it with zero emission problems. It gets worked every day. 8-10,000 pound skidloaders or tractors ect on the flatbed every day. Working. As for smell yes they are different than old diesels but they still stink. Especially when cold. Not the same stink but I would never start one in my garage. Let alone start one daily. When the emission warranty expires on that dodge shes getting deleted. When it gets deleted I guarantee the mileage and the power will get better.

  8. #8
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    Dec 2009
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    Kingston, IL
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    The new diesels are not what they used to be. I agree with previous comments. But I cannot smell my diesel on start in my garage. My wifes Tahoe smells more like unburnt gas than my diesel does of anything. Of course the emissions equipment will most likely be the problems of any brand new diesel. They are still good trucks overall. But I would pick the 6.2 over the duramax. The 6.2 is a beast and I wish GM would get rid of 5.3 and make it standard. Great engine!

  9. #9
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    I have to disagree, I think diesel vehicles have a LOT of room in the market in the USA,and honestly NO clue why more don;t have them options
    diesel motors are proven to get better fuel mileage, make POWER in RPM ranges you actually drive ( in both HP and torque) so you don;t have to show HP charts of HIGH HP at rpm ranges NO one drives at! or if they did the motors wouldn;t last very long!
    ,
    old VW 's proved how well they can make MPG"s and last a LONG time in smaller vehicles like car's and such,!

    Yes emissions parts SUCK, and they can rob some power and MPG's for sure.
    but honestly deleting and adding that power,c an lead to more repairs as you NOW are running more HP/Torque that things down stream can handle

    if one really WANTED to delete emissions and MAKE extra power, the BEST time to do so is NEW, when ALL things are NEW an not having a boat load of miles and use on them, if were being honest here!
    all parts of vehicle are wear and tear, as things get more use, they get closer to needing being replaced!
    the time to add \power to a part is honestly NOT after its gotten a 100,000 miles on it IMO!

    its like asking for a weak link to show itself
    YES all things can be replaced and upgraded, but that sort of also means so can a DEF system too!
    many folks that delete and add power,. soon are having trans issue's and other down stream drive line issue's
    nature of the beast! when adding power
    and trans ain;'t cheap or easy to rebuild, just like SOME emission parts are not either
    and deleting is also ILLEGAL, which (rather unlikely), could lead to fine';s, or issues down the road getting serviced or selling or??

    now as for new diesels as to older diesels in 1/2-3/4-1 ton trucks, honestly there at there BEST now, they make MORE HP, they make more torque and get better MPG, than any OEM designed diesel of the past!

    the folks that claim there NOT, are folks that have TUNED a older motor and then YES some of the older one's have proven to be longer lasting and NO emissions crap to worry or deal with, but unless you MOD them older diesels, they don;t make near the power of the new one's or run as efficiently!
    so honestly if were being honest, and not talking modified motors(which an still be done to new one's)
    the diesels of today in basic rucks, are at there BEST ever!
    and there getting better all the time, sadly price tags are climbing WAY faster than there getting better IMO!
    about ANY modern vehicle with some higher end options IMO is a ticking time bomb of expensive repairs once warranty runs out, WAY too many electrical gadgets in them that costs $$$$ to repair/replace! and NO one really know's what the life span will be on things, as tech keeps changing so fast on what is added to them now!
    if history was to be an example, severe weather changes, dampness, water, ice snow, rain, heat dry dusty?? all have proven to play **** on electronic's as they age!
    some how I think ALL these touch screens will all be crap down the road after a warranty expires at some point rather scary IMO! as many vehicles without it working , you cannot even do basic things anymore?

  10. #10
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    Dec 2009
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    LandoLakes
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    Default

    I have 3.0 EcoDiesel and love it which replaced my 5.9 24valve and I have always loved anything diesel. In the beginning I was very skeptical about the DEF/DPF/SCR systems but now I do not worry about those parts of the systems even though I do know they still have some issues, thing is that is part of the exhaust. What I do not like is the EGR on diesels and how they choke off the intake systems. Seeing the soot buildup in intakes,swirl valves,EGR tube, MAP sensor, etc and it makes me sick to see what is plugging up the intake systems. Of course my 3.0 is known more for these issues than others but all similar systems do the same thing just to a lessor degree. With that being said I know what I signed up for and still love the truck/motor. Now if my manifold ever melts or spin bearing I may feel different about diesels if tied to EGR.

  11. #11
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    Il
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    IMG_1505.jpg
    IMG_1506.jpg

    This was after 26,000mi truck now has 117,000 on it and has had zero emission problems

    edit: this is the intake horn right after the EGR

  12. #12
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    LandoLakes
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    Default

    Highlander...what motor is that from?

  13. #13
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    Dec 2011
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    United States
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    Default

    Those two options are completely different. If you just want something to drive back and forth to work short distances and good power go 6.2 if you drive a lot of miles and tow often I'd go diesel as it will pay off in fuel savings. I drive 40k a year and two about 15k miles a year. My towing mileage is about 15-18mpg in my 2500 Cummins. All gas trucks I've had struggle to achieve 10mpg towing. Empty mileage is about the same for the gas vs diesel trucks I've had but my cummins is leveled on 35" a/t tires vs stock ride height on the previous gas trucks. I'm a diesel guy, tried to go back to gas and hated it so went back to diesel and loving it

  14. #14
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    Il
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    Quote Originally Posted by racerx View Post
    Highlander...what motor is that from?
    cummins 6.7

  15. #15
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    Dec 2009
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    Chicagoland Area
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    Default

    Quote Originally Posted by Sweep800 View Post
    In the market for a 2020 1500 Sierra AT4. Anybody have one with the 3.0 or the 6.2 gas?
    Mileage is better with diesel but towing is better with the 6.2. I rarely tow anything but live in Stink'n but have a place in St Germain so i make that drive frequently. I drove a 3.0 and it had pretty good pep in sport mode.
    Just looking for some incite/input or even opinions. I'm a GM guy so won't be considering any of the competition.

    Thanks,
    Chris
    I have the 6.2 motor in both my Yukon Denali and a 2020 GMC Sierra 1500. I absolutely love that engine for driving in both city or highway environments. I also just pulled my boat with it which weighs 5500 pounds plus trailer and had no problems at all. I did consider the diesel in the Sierra when looking but resale value on those are not nearly as good as the gas Sierras. Must people who are buying a diesel are looking at 2500's not 1500's. That along with the noise/smell from the test drive pushed me back to the gas motor. Go with the 6.2 you will love it. Its only a $2400 upgrade over the 5.3.

  16. #16
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    Dec 2009
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    Hortonville, Wi
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    Default

    I would go 6.2 all day. Fast, tows well, and proven reliable. Especially not until the 3.0 minimax is proven out yet...

  17. #17
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    Dec 2009
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    33

    Default

    May be Apples and Oranges here but I have a 2017 GMC Canyon with the 2.8 Duramax. So granted it is not the same motor and it sits in their mid-sized platform, but I think GM was working on the smaller diesels here. 41,000 problem free miles where I get about 27mpg around town and 31-32mpg on the trips to the Presque Isle area. I don't tow much any more since all the toys are already up there but never had an issue moving the boat or sleds around. I can say it is nice getting around 600+ miles to a tank of fuel so I can practically round trip. 2.5 gallons of DEF lasts around 5,000 miles so at less that 2 tenths of a cent per mile I am not considering that as much of an operating expense. But if the emissions or electronics go someday then my satisfaction will go with it. I can't do squat with that engine bay but change oil and filters.

  18. #18
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    Dec 2009
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    Batavia, Il/ St Germain,WI
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    Default

    Thanks for the imput/coments. I test drove a 6.2 Danali yesterday. It was nice and smooth with great power. I'm definitely leaning that way. I gotta say tho that For $71k it seamed a little dated/plain? The Tech package was a nice feature with the cameras all around, The heads up display was cool but I find myself struggling to pull the trigger. Hmmmmmmmm! Maybe I should just throw brakes and tires on my 13 2500 silverado and drive it another winter. Only 138k miles(original brakes BTW). I'll figure it out, Thanks again guys. Sure can't wait to ride this winter. Brap!

  19. #19
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    Dec 2009
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    Lake Geneva/ St. Germain
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    Default

    I also have a place in St G..... I used to run my GMC pickup north all the time, but a few years ago (2014) I bought a chevy cruze (40mpg) to do the running north now and leave my truck up there..... I call the cruze my hillbilly pickup..... nice to go north and back on 12 gallons of gas.....

  20. #20
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    Feb 2012
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    SC WISCONSIN
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    Default

    The GM interior is kind of boring compared to the competition. Im going through the same thing right now, it's hard to pull the trigger with the price of these trucks. Very little for discounts and rebates right now as well. I was looking at Ford HD trucks, very few on the lots and most are asking MSRP

  21. #21
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    Dec 2009
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    Quote Originally Posted by shelby369 View Post
    I also have a place in St G..... I used to run my GMC pickup north all the time, but a few years ago (2014) I bought a chevy cruze (40mpg) to do the running north now and leave my truck up there..... I call the cruze my hillbilly pickup..... nice to go north and back on 12 gallons of gas.....
    I'd love to do that except I'm a carpenter/Builder and always like to have my tools on hand. I built my place 10 years ago and always have projects going on and some maintenance as I rent it out during the summer months so there's always things to do. I'm slowly building a second set with the older ones I have but still struggle to be without the tools. One of these days I'll stop tinkering and just hire someone! LOL

  22. #22
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    Dec 2009
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    Quote Originally Posted by chunk06 View Post
    The GM interior is kind of boring compared to the competition. Im going through the same thing right now, it's hard to pull the trigger with the price of these trucks. Very little for discounts and rebates right now as well. I was looking at Ford HD trucks, very few on the lots and most are asking MSRP
    You should have bought a month ago.....you would have had at least $10k of on any of the day 2020 gmc sierras or denali pick ups. This is on the 1500 series...

  23. #23
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    Dec 2009
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    Watersmeet
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    Quote Originally Posted by Highflyer View Post
    You should have bought a month ago.....you would have had at least $10k of on any of the day 2020 gmc sierras or denali pick ups. This is on the 1500 series...
    If you are a Costco member that can save You a lot of money and also September and October are a real good time to buy a previous model year between Costco and go rebates I saved close to 20%. But that was last year when there was a large stock of vehicles and it was the Chevy blazer. But seem to apply to most manufacturers this time of year.

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