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Old 06-19-2021, 05:10 PM   #1
Abcdj
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Default Chevy Duromax 3.0 V6 diesel?

Let me know what your experiences with fuel economy and performance are with the Chevy 1500 3.0 V6 duromax diesel.
My fat fingers hit the red thumbs down. Please disregard.

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Old 06-19-2021, 05:13 PM   #2
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We have one in our 2021 Suburban and the computer shows average around 28 mpg, with less than 10,000 miles.
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Old 06-19-2021, 05:20 PM   #3
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I have a 2020 Z71 and I usually avg around 24.
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Old 06-19-2021, 06:37 PM   #4
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I have a 2020 Z71 and love it. I drive a ton , with lots of starts and stops, and average around 23-24. Gets around 30 on road trips, with highway use.
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Old 06-19-2021, 09:58 PM   #5
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I have a 2020 silverado 4wd.. 24 or so is average from tank to tank. A couple longer trips its 29.. best was 31 for 500 miles.

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Old 06-20-2021, 10:15 AM   #6
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Thanks for the input. No complaints I guess?
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Old 06-20-2021, 10:28 AM   #7
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My buddy and his son have one and love them.

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Old 06-20-2021, 11:06 AM   #8
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I have a 2020 GMC AT4 with the 3.0 diesel and love it. No complaints. Averages 25 mpg
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Old 06-20-2021, 11:29 AM   #9
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Thanks for the input. No complaints I guess?
None. I love it.

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Old 06-20-2021, 11:42 AM   #10
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We have one in our 2021 Suburban and the computer shows average around 28 mpg, with less than 10,000 miles.
Wow. Did not know you could get a duromax in a Suburban. Cool
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Old 06-20-2021, 11:46 AM   #11
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Employee has one, says averaging 25 MPG in town. Higher on highway, close to 30
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Old 06-20-2021, 05:03 PM   #12
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I have a 2021 2wd with 8500 miles…

I’d say I avg 27, I’ve gotten 32 on a 50 mile trip to work. Usually I can get 28-29 on highway
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Old 06-20-2021, 10:15 PM   #13
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How is the power?

Was contemplating one but ended up going back to another 3/4 ton with the 6.7 power stroke.

This one with the 10 speed gets 18-20 mpg though, a huge improvement over my 17’

My only concern with a small 1/2 ton diesel is it would be underpowered pulling trailers. I don’t pull super heavy but do pull long distance at highway speeds
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Old 06-20-2021, 10:20 PM   #14
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Wow. Did not know you could get a duromax in a Suburban. Cool
Dang, I meant Tahoe.
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Old 06-21-2021, 06:15 AM   #15
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txtrophy,
mine pulls just fine, but the fuel mileage goes down pretty good with a loaded trailer. That would be my only complaint, but it's not terrible. I don't notice any lack of power pulling a heavy 16' trailer with a ranger and 4 wheeler in it.
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Old 06-21-2021, 08:11 AM   #16
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I’d like to know actual mileage with a small boat. My ‘16 GMC 5.3 will get 22 unloaded but with a small 18’ boat it drops to less than 10. In high school my 73 gmc would get better than that towing my boat
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Old 06-21-2021, 10:35 AM   #17
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I have the 2020 GMC and pulling my camper (6500) get around 13-14 on a longer trip. 10-12 in town. I love it. 24-26 in town and close to 30 highway not pulling.
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Old 06-21-2021, 08:03 PM   #18
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We sold our fifth wheel two years ago and got a motorhome. No need for my 3/4 ton any longer. The mpg gain will be amazing. Only thing I will be towing is my mule a couple of times a year to the lease.
I guess I will find out now first hand. Pulled the trigger on this 2020 today. Z71, Texas Edition, 4x4 with 4780 miles.
Thanks for all the input fellas.
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Old 06-21-2021, 08:15 PM   #19
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Nice truck. You will love it
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Old 06-21-2021, 08:19 PM   #20
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Nice
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Old 07-21-2021, 11:41 AM   #21
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I have a 2021 1500 and love it. Get 28-29 in the city. When driving on trips I go around 80 mph so I average around 26-27 MPG. Pulled a 24' boat and got 23 MPG.
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Old 07-21-2021, 01:45 PM   #22
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For the record it’s an in line 6 not a V6.

Look up the maintenance schedule on them. There are a few odd duck thinks at 150k miles. If you don’t keep a vehicle that long then disregard.

I would consider one in a Tahoe/Suburban and a GMC truck if I were looking for a 1/2 ton.


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Old 07-21-2021, 01:52 PM   #23
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My wife has a 2021 Suburban with the duramax in it. We drove to Destin last week and averaged 25 mpg. Thats with 4x4 and going about 85 mph.
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Old 07-21-2021, 01:54 PM   #24
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Quote:
Originally Posted by EastTexasMan View Post
I have a 2021 2wd with 8500 miles…

I’d say I avg 27, I’ve gotten 32 on a 50 mile trip to work. Usually I can get 28-29 on highway
You don't drive much... lol
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Old 07-21-2021, 03:41 PM   #25
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I have to ask.... What are the benefits of a 1/2 ton diesel? I actually have been driving an 03 Dodge/2500/5.9 since it was new (18 years). I plan on keeping it a few more years since it just hit 160,000, but I no longer need a diesel since I sold our camper 3 years ago.
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Old 07-21-2021, 04:33 PM   #26
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I’m glad this was posted. I’m planning on replacing the wife’s Acadia next year and have been really interested in the duramax for the suburban.
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Old 07-21-2021, 05:12 PM   #27
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This is on my short list for my next truck. I want to see the 2022 Tundra first. I drove one in February when I was working near Boston, MA and really liked it. I joined a Facebook 3.0 Duramax group to research them before buying. Unfortunately, there are quite a few issues posted. The one I drove had a "clunk" in the rear end. That turns out to be a somewhat common problem, supposedly from the springs when you let off the throttle.

  • Rear main oil seal suddenly failing.
  • Crank, no start. The engine will crank for about 10 seconds but not start.
  • Radio and screen issues, flickering, changing on its own, etc.
  • Using a lot of DEF when towing


All that said, the reported problems seem to be less often on that site. I will still consider one when the time comes.
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Old 07-21-2021, 05:16 PM   #28
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Originally Posted by tpack View Post
I have to ask.... What are the benefits of a 1/2 ton diesel? I actually have been driving an 03 Dodge/2500/5.9 since it was new (18 years). I plan on keeping it a few more years since it just hit 160,000, but I no longer need a diesel since I sold our camper 3 years ago.

The fuel mileage can be 30+ on the highway and low to mid 20s in town. If you only tow a boat or about 7,000 pounds occasionally, it will do that and get roughly 12-18 mpg, depending on load and driving habits.
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Old 07-21-2021, 06:06 PM   #29
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Just got a 2.8 duramax in a 2016 Colorado. Seems like a great motor.
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Old 07-21-2021, 09:06 PM   #30
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Quote:
Originally Posted by Mike D View Post
For the record it’s an in line 6 not a V6.

Look up the maintenance schedule on them. There are a few odd duck thinks at 150k miles. If you don’t keep a vehicle that long then disregard.

I would consider one in a Tahoe/Suburban and a GMC truck if I were looking for a 1/2 ton.


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If you don’t keep it that long you’ll never actually catch up on the fuel savings since the 5.3 is cheaper. I did a whole spreadsheet on it when I was looking to buy a new truck and you have to keep them a while to even come close to breaking even with fuel savings. Didn’t factor in the added cost of DEF or more expensive maintenance either.

My BIL has one and loves it, but has had a couple of the issues noted above. Personally, I’d wait another year or so to let them work out the rest of the kinks.


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Old 07-21-2021, 09:16 PM   #31
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Quote:
Originally Posted by Keith View Post
This is on my short list for my next truck. I want to see the 2022 Tundra first. I drove one in February when I was working near Boston, MA and really liked it. I joined a Facebook 3.0 Duramax group to research them before buying. Unfortunately, there are quite a few issues posted. The one I drove had a "clunk" in the rear end. That turns out to be a somewhat common problem, supposedly from the springs when you let off the throttle.

  • Rear main oil seal suddenly failing.
  • Crank, no start. The engine will crank for about 10 seconds but not start.
  • Radio and screen issues, flickering, changing on its own, etc.
  • Using a lot of DEF when towing


All that said, the reported problems seem to be less often on that site. I will still consider one when the time comes.
Were these problems on the Chevy or GMC.
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Old 07-22-2021, 08:51 AM   #32
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Were these problems on the Chevy or GMC.

I believe every issue has happened on both brands. I am not aware of any issue that is exclusive to just one brand.
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Old 07-22-2021, 09:27 AM   #33
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Not trying to step on anybody`s toes, but I still don`t see the advantage of the 1/2 ton diesel over the 5.3 gasser. You may get better MPG, but diesel is sometimes a buck more per gallon at the pump(plus DEF) and the truck is going to cost you more up front. The diesel won`t tow as much either. I haven`t done a lot of research on the matter, but on the surface it just seems like the 5.3 gasser is the better decision.

3L Duramax Diesel vs. 5.3L V8: Key Specs
Simply put, the choice boils down to fuel efficiency and horsepower. The gas truck is quicker accelerating from a dead stop, and can hit a higher towing maximum (as you’ll see below). If you frequently travel between Fitzgerald and Ocilla and are looking to save on fuel, the lower cost of diesel fuel can really add up. Compare key performance specs for a diesel vs. gas truck, below:

5.3L V8 Gasoline Engine
Output – 355 horsepower and 383 pound-feet of torque
Efficiency (RWD) – EPA-estimated 17/23 city/highway MPG
Efficiency (4WD) – EPA-estimated 16/22 city/highway MPG
Availability – All Silverado trims

3.0L 6-cylinder Turbodiesel
Output – 277 horsepower and 460 pound-feet of torque
Efficiency (FWD) – EPA-estimated 23/33 city/highway MPG
Efficiency (4WD) – EPA-estimated 22/26 city/highway MPG
Availability – LT, RST, LTZ, High Country trims
Keep in mind that while both engines make 460 lb-ft of torque, the diesel delivers it by 1,500 rpm vs. 4,100 rpm for the V8. You’ll notice the difference on the highway, where the V8 must work a lot harder to generate the same amount of power.

3L Duramax Diesel vs. 5.3L V8: Towing Capability
Unquestionably, the V8’s biggest advantage is towing capability: it offers a max tow rating of 13,400 pounds compared to 9,300 pounds for the diesel. Many drivers will have all the power they need with the diesel, but you should opt for the V8 if you’ll be towing anything that’s heavy enough to be on the high end of the diesel engine’s capability, like a large boat or RV trailer.

What if you’re towing at altitude? In this case, the diesel may be your best bet because a naturally aspirated engine will lose power the higher you go. Thanks to its turbocharger, a diesel engine can compensate for some of this loss.


Questions about the benefits of diesel vs. gas trucks? At Robert Fender Chevrolet, a team of automotive experts is standing by to provide the info and specs you need to make an informed decision. Contact us for car-buying tips, or stop by our dealership in Douglas to take your favorite Silverado models for a test drive.
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Old 07-22-2021, 10:00 AM   #34
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Originally Posted by tpack View Post
Not trying to step on anybody`s toes, but I still don`t see the advantage of the 1/2 ton diesel over the 5.3 gasser. You may get better MPG, but diesel is sometimes a buck more per gallon at the pump(plus DEF) and the truck is going to cost you more up front. The diesel won`t tow as much either. I haven`t done a lot of research on the matter, but on the surface it just seems like the 5.3 gasser is the better decision.



3L Duramax Diesel vs. 5.3L V8: Key Specs

Simply put, the choice boils down to fuel efficiency and horsepower. The gas truck is quicker accelerating from a dead stop, and can hit a higher towing maximum (as you’ll see below). If you frequently travel between Fitzgerald and Ocilla and are looking to save on fuel, the lower cost of diesel fuel can really add up. Compare key performance specs for a diesel vs. gas truck, below:



5.3L V8 Gasoline Engine

Output – 355 horsepower and 383 pound-feet of torque

Efficiency (RWD) – EPA-estimated 17/23 city/highway MPG

Efficiency (4WD) – EPA-estimated 16/22 city/highway MPG

Availability – All Silverado trims



3.0L 6-cylinder Turbodiesel

Output – 277 horsepower and 460 pound-feet of torque

Efficiency (FWD) – EPA-estimated 23/33 city/highway MPG

Efficiency (4WD) – EPA-estimated 22/26 city/highway MPG

Availability – LT, RST, LTZ, High Country trims

Keep in mind that while both engines make 460 lb-ft of torque, the diesel delivers it by 1,500 rpm vs. 4,100 rpm for the V8. You’ll notice the difference on the highway, where the V8 must work a lot harder to generate the same amount of power.



3L Duramax Diesel vs. 5.3L V8: Towing Capability

Unquestionably, the V8’s biggest advantage is towing capability: it offers a max tow rating of 13,400 pounds compared to 9,300 pounds for the diesel. Many drivers will have all the power they need with the diesel, but you should opt for the V8 if you’ll be towing anything that’s heavy enough to be on the high end of the diesel engine’s capability, like a large boat or RV trailer.



What if you’re towing at altitude? In this case, the diesel may be your best bet because a naturally aspirated engine will lose power the higher you go. Thanks to its turbocharger, a diesel engine can compensate for some of this loss.





Questions about the benefits of diesel vs. gas trucks? At Robert Fender Chevrolet, a team of automotive experts is standing by to provide the info and specs you need to make an informed decision. Contact us for car-buying tips, or stop by our dealership in Douglas to take your favorite Silverado models for a test drive.
All I can tell you is in that 3.0 Duramax group, a lot of people have switched from the 5.3 and the 6.2 and I don't remember a single person regretting their decision.
Anyone towing 13,400 pounds with a 1/2 truck should have bought a 3/4 ton to begin with.

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Old 07-22-2021, 10:11 AM   #35
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Quote:
Originally Posted by tpack View Post
Not trying to step on anybody`s toes, but I still don`t see the advantage of the 1/2 ton diesel over the 5.3 gasser. You may get better MPG, but diesel is sometimes a buck more per gallon at the pump(plus DEF) and the truck is going to cost you more up front. The diesel won`t tow as much either. I haven`t done a lot of research on the matter, but on the surface it just seems like the 5.3 gasser is the better decision.

[/B]
It's literally just for fuel mileage. The EPA is mandating these changes. Which is why Ford has a tiny displacement ecoboost and a small displacement ecoboost, along with its large displacement V8. And a diesel in its half tons now.
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Old 07-22-2021, 10:38 AM   #36
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Originally Posted by WItoTX View Post
It's literally just for fuel mileage. The EPA is mandating these changes. Which is why Ford has a tiny displacement ecoboost and a small displacement ecoboost, along with its large displacement V8. And a diesel in its half tons now.
FYI, Ford has discontinued their 3.0 Powerstroke diesel engine in their half ton trucks.

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Old 07-22-2021, 03:28 PM   #37
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Originally Posted by Keith View Post
I believe every issue has happened on both brands. I am not aware of any issue that is exclusive to just one brand.
Was not sure about the radio problems. Those could have been brand specific
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Old 07-22-2021, 03:31 PM   #38
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Originally Posted by tpack View Post
Not trying to step on anybody`s toes, but I still don`t see the advantage of the 1/2 ton diesel over the 5.3 gasser. You may get better MPG, but diesel is sometimes a buck more per gallon at the pump(plus DEF) and the truck is going to cost you more up front. The diesel won`t tow as much either. I haven`t done a lot of research on the matter, but on the surface it just seems like the 5.3 gasser is the better decision.

3L Duramax Diesel vs. 5.3L V8: Key Specs
Simply put, the choice boils down to fuel efficiency and horsepower. The gas truck is quicker accelerating from a dead stop, and can hit a higher towing maximum (as you’ll see below). If you frequently travel between Fitzgerald and Ocilla and are looking to save on fuel, the lower cost of diesel fuel can really add up. Compare key performance specs for a diesel vs. gas truck, below:

5.3L V8 Gasoline Engine
Output – 355 horsepower and 383 pound-feet of torque
Efficiency (RWD) – EPA-estimated 17/23 city/highway MPG
Efficiency (4WD) – EPA-estimated 16/22 city/highway MPG
Availability – All Silverado trims

3.0L 6-cylinder Turbodiesel
Output – 277 horsepower and 460 pound-feet of torque
Efficiency (FWD) – EPA-estimated 23/33 city/highway MPG
Efficiency (4WD) – EPA-estimated 22/26 city/highway MPG
Availability – LT, RST, LTZ, High Country trims
Keep in mind that while both engines make 460 lb-ft of torque, the diesel delivers it by 1,500 rpm vs. 4,100 rpm for the V8. You’ll notice the difference on the highway, where the V8 must work a lot harder to generate the same amount of power.

3L Duramax Diesel vs. 5.3L V8: Towing Capability
Unquestionably, the V8’s biggest advantage is towing capability: it offers a max tow rating of 13,400 pounds compared to 9,300 pounds for the diesel. Many drivers will have all the power they need with the diesel, but you should opt for the V8 if you’ll be towing anything that’s heavy enough to be on the high end of the diesel engine’s capability, like a large boat or RV trailer.

What if you’re towing at altitude? In this case, the diesel may be your best bet because a naturally aspirated engine will lose power the higher you go. Thanks to its turbocharger, a diesel engine can compensate for some of this loss.


Questions about the benefits of diesel vs. gas trucks? At Robert Fender Chevrolet, a team of automotive experts is standing by to provide the info and specs you need to make an informed decision. Contact us for car-buying tips, or stop by our dealership in Douglas to take your favorite Silverado models for a test drive.
There really is no comparison of the 5.3 and the 3.0. The real comparison is the 6.2 and the 3.0. However to get full benefits of the 6.2 you have to use higher octane fuel that negates price difference between diesel fuel and gas.
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Old 07-22-2021, 04:33 PM   #39
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I just competed a 3300 mile round trip to Delaware and back. Averaged 31 mpg. I have installed the S&B cold air intake which has improved the throttle response. I have no regrets and believe the number of issues are not any higher than what you hear about the new 5.3 or 6.2. I went with the 3.0 because I wanted the fuel mileage benefit. I do keep my trucks longer than most people. Towing has not been a problem with plenty or throttle available.
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Old 07-24-2021, 06:57 AM   #40
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I average a hand calculated 26 mpg in my 2020 z71. Last tank I blew out my previous high of ~29.5 and hit almost 35 mpg coming back to Dfw from Houston.

36k miles and very few issues.


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Old 07-24-2021, 08:36 AM   #41
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I know that most people are comparing the 5.3 to the diesel. What about the 6.2 vs the diesel? Wife needs a new car and I’m about to order her another Escalade. She’s had the 6.2 in her last 3 Escalades. I really like the 6.2 because it will go. I’d do the diesel if (and only if) it performs the same as the 6.2. Does it have the pep and the go? It’s not an upgrade (up charge).
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Old 07-24-2021, 08:40 AM   #42
Floor Man
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I know that most people are comparing the 5.3 to the diesel. What about the 6.2 vs the diesel? Wife needs a new car and I’m about to order her another Escalade. She’s had the 6.2 in her last 3 Escalades. I really like the 6.2 because it will go. I’d do the diesel if (and only if) it performs the same as the 6.2. Does it have the pep and the go? It’s not an upgrade (up charge).

The diesel will not feel as peppy as the 6.2. I drove both back to back.


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Old 07-24-2021, 09:29 AM   #43
Quackerbox
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Interesting info. I may or not be looking for a truck in the next year or whenever the market gets back to normal.

Would be replacing a tacoma and that's gonna be hard. Mileage is the only killer of the truck.

Had a 6.2 high country,have 2020 5.3 in a work truck (put 160k on the last one) and wife has a 7.3 Ford gasser. They all run great with the 6.2 getting the best mileage at this point. We didn't see any performance loss with 87 octane in it either

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Old 07-24-2021, 11:42 AM   #44
Mike D
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If you don’t keep it that long you’ll never actually catch up on the fuel savings since the 5.3 is cheaper. I did a whole spreadsheet on it when I was looking to buy a new truck and you have to keep them a while to even come close to breaking even with fuel savings. Didn’t factor in the added cost of DEF or more expensive maintenance either.

My BIL has one and loves it, but has had a couple of the issues noted above. Personally, I’d wait another year or so to let them work out the rest of the kinks.


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How much difference in cost were you factoring in? The diesel option is the same upgrade cost as the 6.2L gasser over the 5.3L.


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Old 07-24-2021, 01:23 PM   #45
bsills
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How much difference in cost were you factoring in? The diesel option is the same upgrade cost as the 6.2L gasser over the 5.3L.


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When we looked pricing in order was 5.3, diesel, 6.2. I believe the 6.2 was $1,500 more than the diesel. Duramax is way peppier than the 5.3, the 5.3 is weak in the suburban.
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Old 07-25-2021, 08:45 AM   #46
Abcdj
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After a month and less than 2200 miles driven, my mpg is 26.7 combined. I have only used 2 bars on the DEF gauge. The truck only has 6800 miles on it so it is not even broken in yet.
No long road trips yet. No performance issues so far knock on wood.
As far as power and response. I have only romped on it one time from a dead stop. To me it was flying in no time.
I have not pulled any kind of trailer yet so no self review on that performance. I have the 3.73 rear end so it should do fine there.
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Old 07-25-2021, 09:03 AM   #47
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After a month and less than 2200 miles driven, my mpg is 26.7 combined. I have only used 2 bars on the DEF gauge. The truck only has 6800 miles on it so it is not even broken in yet.

No long road trips yet. No performance issues so far knock on wood.

As far as power and response. I have only romped on it one time from a dead stop. To me it was flying in no time.

I have not pulled any kind of trailer yet so no self review on that performance. I have the 3.73 rear end so it should do fine there.
Nice, I'm glad to hear you're liking your truck and the fuel mileage is awesome. Is it a 2WD or 4X4? What trim package?

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Old 07-25-2021, 10:52 AM   #48
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Nice, I'm glad to hear you're liking your truck and the fuel mileage is awesome. Is it a 2WD or 4X4? What trim package?

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Thanks, Its a LT Z71 4 x4 Texas edition.
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Old 07-25-2021, 11:38 AM   #49
Bullseye07
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How much difference in cost were you factoring in? The diesel option is the same upgrade cost as the 6.2L gasser over the 5.3L.


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I’ll have to go back and look. If I remember right it was something like $3500-$5000. And the 6.2 didn’t come into the equation for fuel savings for me because it gets worse fuel economy than the 5.3.


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Old 07-25-2021, 12:35 PM   #50
Black-N-Red
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Not sure on the actual mileage but I barrowed my pastor’s GMC 1500 4x4 with 8k miles to drive to Arkansas. From Crockett to Rodgers it only used 3/4 tank of fuel. Rides good & seems to have plenty of power.


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