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Old 06-13-2019, 09:06 PM   #1
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Gm 6.6 liter gas engine

Anyone have experience pulling a trailer with the new 6.6 liter gas engine. Curious as how it compares in performance and mileage to the 6.6 Duramax.
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Old 06-13-2019, 09:24 PM   #2
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Anyone have experience pulling a trailer with the new 6.6 liter gas engine. Curious as how it compares in performance and mileage to the 6.6 Duramax.
I don't think it's on the ground yet. I've read it will come out late summer.
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Old 06-13-2019, 09:40 PM   #3
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Sounds like it will be Gen 5, 396
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Old 06-14-2019, 07:44 AM   #4
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I would never compare modern diesel to a modern gasoline engine. Apples to oranges. I have towed with both and believe both a great options for towing. Now if I was a betting man I would predict ( info might be on the internet already I havenít looked) GM will have numbers higher in horsepower and torque over the Ram but under Fords new big block. Then Ram will be forced to come out with better numbers and the cycle repeats itself. The winner the consumer that can afford a new truck
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Old 06-14-2019, 12:17 PM   #5
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Hi,


Well the old GM big block 8 liter engine was in the diesel ballpark powerwise. But in fuel economy there was no comparison -- 8-10 mpg towing or running empty.



FWIW.


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Old 06-14-2019, 01:01 PM   #6
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It is not out yet. You can't even order a 2020 yet at least on line. I sure do like the new GMC but not sure if the Chevy has grown on me.
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Old 06-14-2019, 01:03 PM   #7
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I would never compare modern diesel to a modern gasoline engine. Apples to oranges. I have towed with both and believe both a great options for towing. Now if I was a betting man I would predict ( info might be on the internet already I havenít looked) GM will have numbers higher in horsepower and torque over the Ram but under Fords new big block. Then Ram will be forced to come out with better numbers and the cycle repeats itself. The winner the consumer that can afford a new truck
They just released the price guide yesterday along with power and towing info. It did say that any way you configure a drw 3500 it will be rated at 35k fifth and goose. Impressive.
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Old 06-14-2019, 01:05 PM   #8
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I would never compare modern diesel to a modern gasoline engine. Apples to oranges. I have towed with both and believe both a great options for towing. Now if I was a betting man I would predict ( info might be on the internet already I havenít looked) GM will have numbers higher in horsepower and torque over the Ram but under Fords new big block. Then Ram will be forced to come out with better numbers and the cycle repeats itself. The winner the consumer that can afford a new truck
You might not but I promise you others will. Just wait until some owner of this engine makes a post (positive or negative) and 29 other members will make a comparison (positive or negative) to a diesel of their own or belonging to a half-step-uncle-in-law.
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Old 06-14-2019, 01:08 PM   #9
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Sounds like it will be Gen 5, 396
Exactly 6.6 liters == 402.756711 cubic inches according to https://www.bing.com/search?q=liters...ZI&form=MOZTSB
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Old 06-14-2019, 02:04 PM   #10
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They just released the price guide yesterday along with power and towing info. It did say that any way you configure a drw 3500 it will be rated at 35k fifth and goose. Impressive.


I got to looking after reading your post I thought it said any combination of diesel. As for the numbers 401 hp and 464 pounds of torque that will tow most trailers
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Old 06-14-2019, 02:07 PM   #11
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It probably is diesel. They may not offer a gas drw not sure.it did say the 2500 had a 18500 which is not bad at all either.
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Old 06-14-2019, 02:54 PM   #12
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looked up the new 2020 6.6 showing a max tow of 17500 . ram is at 18500 or there about . still great numbers for a gasser . also showing prices slightly less then the 2019 hd trucks . may be time to upgrade we will see
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Old 06-14-2019, 02:55 PM   #13
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looked up the new 2020 6.6 showing a max tow of 17500 . ram is at 18500 or there about . still great numbers for a gasser . also showing prices slightly less then the 2019 hd trucks . may be time to upgrade we will see
Ok I was mistaken.
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Old 06-14-2019, 05:19 PM   #14
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Ok I was mistaken.
Sorry if it sounded like i was calling you on it , i was not just making an observation and have been waiting to up grade trucks . Not sure if i want to get a first yr engine though
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Old 06-14-2019, 05:24 PM   #15
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Sorry if it sounded like i was calling you on it , i was not just making an observation and have been waiting to up grade trucks . Not sure if i want to get a first yr engine though
No offense taken at all. Don't blame you if you wanna wait a year or 2. I have a feeling it's based off of the current LT engine that seems to be pretty stout
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Old 06-14-2019, 05:41 PM   #16
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No offense taken at all. Don't blame you if you wanna wait a year or 2. I have a feeling it's based off of the current LT engine that seems to be pretty stout
It's achevy so it should be done right . cast iron block aluminum heads , a bit longer stroke , forged crank . ETC should be good to go right off the bat. But yopu know how first year production runs can be they find that one or two things they change. Then again there might be great deals on 2019 with the proven 6.0 that has almost 3g extra towing then my 03 6.0 which has 195800 miles. i know it's just getting broken in but would like electric windows as mine does not have thhem
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Old 06-14-2019, 05:45 PM   #17
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It's achevy so it should be done right . cast iron block aluminum heads , a bit longer stroke , forged crank . ETC should be good to go right off the bat. But yopu know how first year production runs can be they find that one or two things they change. Then again there might be great deals on 2019 with the proven 6.0 that has almost 3g extra towing then my 03 6.0 which has 195800 miles. i know it's just getting broken in but would like electric windows as mine does not have thhem
This is very true I'm in it 08 GMC 6.0 with 100 and 51000 and runs like a champ
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Old 06-14-2019, 07:50 PM   #18
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Looking forward to the 2020 Chevy 4500, 5500, 6500 HD's, and who will build a MH on the chassis. That will be my next RV.
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Old 06-14-2019, 08:05 PM   #19
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Write-up with pics here: https://www.gm-trucks.com/forums/top...iesel-engines/
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Old 06-14-2019, 09:10 PM   #20
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This is very true I'm in it 08 GMC 6.0 with 100 and 51000 and runs like a champ
That was supposed to be 150000.
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