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Joined: Apr 2011
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Campfire 'Bwana
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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.


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Originally Posted by mainer_in_ak
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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Nice engine as is the engine on the Ram.


Jimmy Carter can now go to his grave and not be known as the worst president in US HISTORY.
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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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Campfire 'Bwana
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Originally Posted by kk alaska
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.


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I have a suburban on order with the 3.0. I'll be lucky to see it this year.

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Originally Posted by AEL
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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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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Campfire 'Bwana
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Originally Posted by Burleyboy
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.


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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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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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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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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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