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Joined: Apr 2011
Posts: 13,526
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Campfire Outfitter
Joined: Apr 2011
Posts: 13,526 |
That’s awesome mileage you all are getting with the 3.0
I have a 2.8 in a Colorado ZR2 and about the best I’ve seen is 25-26MPG in any of my driving.
I’d definitely take a look at the 1500 if it’s that much better.
Good luck truck shopping.
Semper Fi
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Joined: Dec 2014
Posts: 7,638
Campfire Outfitter
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Campfire Outfitter
Joined: Dec 2014
Posts: 7,638 |
Duckster, you have one heck of an engine. Almost full torque a 1600 rpms. No variable valve timing on a fkn v6 is going to produce that low end.
A long stroke inline six, where the stroke is longer than the bore diameter, that's a truck motor. With the inline 6, you have a piston firing off, every 60 degrees of crank rotation, rather than the 90 degrees of a v8.
I've never found an inline six motor I didn't like. The people who are prematurely crying about the oil pump belt, the motor just came out for Christ's sake. Give it a rest parrots
In the half ton world, hats off to gm for slapping the only firewood tractor motor in there......
Whoa there , help me with the math...ok, 720 deg rotation in any 4 stroke eng divided by 6 cylinders....isn't that 120 degrees between firing strokes?
Well this is a fine pickle we're in, should'a listened to Joe McCarthy and George Orwell I guess.
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Joined: Sep 2004
Posts: 28,891
Campfire Ranger
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Campfire Ranger
Joined: Sep 2004
Posts: 28,891 |
Nice engine as is the engine on the Ram.
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Joined: Feb 2001
Posts: 7,670
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2001
Posts: 7,670 |
Very interested in a 4x4 Crew cab 6.5 ft bed just want to know how it will do with short trips sitting all winter and DEF issues, and cold weather. Do not tow more than 6K and tired of 2004 Silverado 5.3 lack of torque.
kk alaska
Alaska 7 months of winter then 5 months of tourists
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Joined: Apr 2011
Posts: 13,526
Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2011
Posts: 13,526 |
Very interested in a 4x4 Crew cab 6.5 ft bed just want to know how it will do with short trips sitting all winter and DEF issues, and cold weather. Do not tow more than 6K and tired of 2004 Silverado 5.3 lack of torque. I worry about that with my Colorado, but I mostly run it back and forth to work which is 100 miles round trip and up and down the freeway weekly. If it’s cold it’ll idle for a few minutes but I make a point of not letting it sit for long periods of time. Just about to turn a 100k on the truck so I don’t know if I’m right or wrong, but something is work. Awesome little motors. I’m sure the 3.0 is even better.
Semper Fi
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Joined: Nov 2004
Posts: 8,977
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Campfire Outfitter
Joined: Nov 2004
Posts: 8,977 |
I have a suburban on order with the 3.0. I'll be lucky to see it this year.
Bb
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Joined: Apr 2009
Posts: 4,126
Campfire Tracker
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Campfire Tracker
Joined: Apr 2009
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I've got a 1500 Silverado Z71 LTZ with the 3.0 Duramax. I bought it at the beginning of 2020 and have put 35,000 miles on it so far. Mileage has been great - I've averaged right around 27 for the whole time. If I'm driving steady highway miles at moderate speeds, I'll see around 30. At 80 mph or so on the interstate, it is around 25-27. Towing anything has a bigger effect on mileage than with the bigger diesels. I like the engine and the 10-speed tranny combo for my driving. Even with its relatively low hp numbers, the torque is good and its plenty fast.
The truck was problem free until about 33,000 miles. Then the anti-lock brakes and stability control system went out. The dealership replaced the computer control module for that system and I still had problems, so they ended up replacing the brake master cylinder. There was also a problem with the DEF system at the same time that was causing the truck to feel jerky at speed, at it was affecting the fueling. The dealership had to flash the computer control for the DEF system (this is all based on what they told me - its beyond my shade-tree mechanical ability). All was covered under warranty, but doesn't inspire confidence at this point.
Hopefully that will be the end of the issues. 2,000 miles later all seems fine. sounds like a GM vehicle
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Joined: Jun 2001
Posts: 18,683
Campfire Ranger
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Campfire Ranger
Joined: Jun 2001
Posts: 18,683 |
DEF has shorter shelf life in hot weather than winter
If God wanted you to walk and carry things on your back, He would not have invented stirrups and pack saddles
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Joined: Apr 2011
Posts: 13,526
Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2011
Posts: 13,526 |
I have a suburban on order with the 3.0. I'll be lucky to see it this year.
Bb I’ve heard nothing but great things about their 3.0 Duramax in Tahoes and trucks. Mileage is better than my ZR2 with the 2.8 and way less emissions BS also. Not sure if the 3.0 system is more refined or whatever but I’d think that Suburban should be a great rig BB. Getting over 25 MPG from a Suburban is good, no matter how you look at it.
Semper Fi
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Joined: Feb 2008
Posts: 1,557
Campfire Regular
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OP
Campfire Regular
Joined: Feb 2008
Posts: 1,557 |
Well to follow up... trucks were few and far between and I hear they still are. I bought a 2021 f150 5.0 and like it pretty well. Low to mid 20s might but great power. I would have bought a chevy 3.0 I think but absolutely none were in stock. Regardless, I'm happy with purchase so far
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Joined: Apr 2004
Posts: 209
Campfire Member
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Campfire Member
Joined: Apr 2004
Posts: 209 |
FYI, next door neighbor owns a Diesel truck repair center, with many years of experience, and he works on all of the brands. He just purchased a 6.2 gas and will not buy any of the late model diesel engines due to the extreme cost of repairs and lack of parts. He says the EPA regulations have eliminated any advantage diesel had over gas and they are only worth it if you have the need for the torque for extreme towing. Just another opinion.
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Joined: Jan 2016
Posts: 1,726
Campfire Regular
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Campfire Regular
Joined: Jan 2016
Posts: 1,726 |
Your neighbor is a smart man. People are dumping diesel rigs out here like crazy. 10-12k premium. Astronomical repair and maintenance and the fuel is higher. 99% of people who think they need one DONT.
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Joined: Nov 2008
Posts: 3,971
Campfire Tracker
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Campfire Tracker
Joined: Nov 2008
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My diesel mechanic dumped his for a 3/4 ton gasser. When the guy that works on them and can basically do the work for the price of parts says ‘forget this, give me a gasser’ you know it’s getting bad.
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Joined: Feb 2005
Posts: 4,289
Campfire Tracker
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Campfire Tracker
Joined: Feb 2005
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I have put about 50,000 miles total now on two different Silverado 3.0 diesel trucks. No issues with the motors or with the trucks themselves. I would agree with what other posters have said regarding mileage. 60-65 mph and minimal wind - will generally get 28-30 mpg. Faster or more windy, more like 25-26. I average about 24.5 mpg per tank with my mix of commuting/daily driving. I drive about 60 miles per day for work/personal use and that is probably about 70% highway/30% city. Very quiet and smooth motor and the 10 speed tranny works great with the 3.0 motor. Not a rocket off the line but plenty of pickup once it is in motion. Have a new Trail Boss with the 3.0 on order but it probably won't be here for another 6 months or so.
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Joined: Feb 2005
Posts: 4,289
Campfire Tracker
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Campfire Tracker
Joined: Feb 2005
Posts: 4,289 |
Just a quick update. Had to tow a 6x6 deer blind out to the ranch on a 16 foot tandem axle trailer. Got an average of 17.4 mpg for the entire 450 mile trip. Not a real heavy load but given the size/shape, it did catch a lot of wind. 65 mph highway driving.
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Joined: Apr 2011
Posts: 13,526
Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2011
Posts: 13,526 |
That’s pretty damn good I’d say. My Ram 3500 won’t get 17 going down hill with a tailwind.
Semper Fi
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Joined: Aug 2005
Posts: 27,374
Campfire Ranger
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Campfire Ranger
Joined: Aug 2005
Posts: 27,374 |
Traded my 2020 Ram Ecodiesel for a GMC Sierra SLT with the 3.0 Duramax. Admittedly this was on level ground with a 15mph tailwind, but nevertheless I was impressed. It's a very smooth riding and running machine. ![[Linked Image from i.imgur.com]](https://i.imgur.com/tFed03A.jpg)
It is irrelevant what you think. What matters is the TRUTH.
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Joined: Aug 2017
Posts: 7,716
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2017
Posts: 7,716 |
I was curious about numbers on this 3.0 duramax and hadn't seen any posted here.
277 hp
460 lb-ft torque
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Joined: Dec 2010
Posts: 2,150
Campfire Regular
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Campfire Regular
Joined: Dec 2010
Posts: 2,150 |
For 2023 the 3.0L Duramax has been revised. The new GM turbocharged 3.0L I6 LZ0 diesel Duramax engine replaces the turbocharged 3.0L I6 LM2 diesel Duramax engine offered for the 2022 model year. The new engine is rated at 305 horsepower and 495 pound-feet of torque, a 10-percent increase in power and a 7.6-percent increase in torque compared to the 277 horsepower and 460 pound-feet of torque produced by the turbocharged 3.0L I6 LM2 diesel Duramax engine offered previously.Click Here
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Joined: Apr 2011
Posts: 13,526
Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2011
Posts: 13,526 |
Traded my 2020 Ram Ecodiesel for a GMC Sierra SLT with the 3.0 Duramax. Admittedly this was on level ground with a 15mph tailwind, but nevertheless I was impressed. It's a very smooth riding and running machine. JG why’d you swap? Problems with the Ecodiesel or just time to trade. 32 MPGs in a full-size wouldn’t stink a bit!
Semper Fi
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