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3.0L Duramax - who owns or has driven one

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Pinnacle Enthusiast

Pinnacle

Posted
Posted

Id like to hear from everyone with  a 3L about all the issues and things you like and dislike about your truck

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srqG8
srqG8

New guy here...   Hoping to give my .02 in case someone is considering the 3.0. And it’s also for the guy who is believing all the negative BS reviews like I almost did.    Long post, so

Gswartz
Gswartz

When I was shopping in November, I had salesman tell me: -1500 diesel didn’t exist -it’s a duramax/Allison so it will last forever -It’s a 1500 but can pull like a 2500 with the diesel

chris84
chris84

Joined the club over the weekend  

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becker87 Senior Enthusiast

becker87

Posted
Posted
Id like to hear from everyone with  a 3L about all the issues and things you like and dislike about your truck
I do sometimes miss the sound of a big V-8.

Sent from my Pixel 2 using Tapatalk

KeysRyder Enthusiast

KeysRyder

Posted
Posted

Loving the 3.0,  first time I drove it at the dealer I was impressed.  Anyone thinking about one, go test drive.   Quiet,  zero lag.  And I live in an area that is 45-55  and I my best 50mile average on the meter,  is 43.5 mpg.    At that 45-55 , I have done some passing slower traffic, and will say that is the only time I have notices lack of V8 Horsepower.   But still does a good job getting around them,  just not quite as fast as the V8's.   The ride is great,  and at running only about 1300 rpm at speed, it is really quiet.   When we were on the way home from dealer the wife was behind me in the car at night,  and I was curious about the old school diesel soot when floored so I did it in front of her at about 55mph and she said she didnt see or smell any diesel.  

  • Like 1
Duramax3oh Enthusiast

Duramax3oh

Posted
Posted (edited)
On 3/21/2020 at 11:00 PM, Pinnacle said:

Id like to hear from everyone with  a 3L about all the issues and things you like and dislike about your truck

I'm ~2,300 miles into mine and still just absolutely love it. Very happy with the get up, the fuel mileage, the transmission, how quiet it is, but also how you still know it's a diesel. 10/10 would buy again.  I have not had to do an oil change or add DEF yet.

 

The only things I dislike about my truck have nothing to do with the engine choice but the design overall:

 

1. The auto-stop/start feature that has to default to on. I started getting used to clicking it off each time, but installed the eliminator where it defaults to its last setting (OFF!). Best aftermarket purchase easily, don't have to worry about that any more. It's akin to dealing with a squeeky closet door for a few months - taking 10 seconds to finally spray the hinges with WD40 - and then it's silent... and you're like "why the hell did I wait so long to do that".

 

2. I really wish the truck had entry handles/grab handles in the overhead liner above each of the 4 doors in addition to the handles they have in place now. I know that's overkill but I would add that if I could.

 

3. Shouldn't be complaining here b/c I easily get 600-700 miles per tank if I'm on a highway trip... but I wish the fuel tank was slightly larger than 24 gallons (i think?)... I don't need it bigger but heck.

 

4. I got the 40/20/40 front bench because I just love the front bench (it's different). I would change the cup holders on it where they were slightly larger... a good judge of cup holder size is being able to fit a bottle of wine in it (for reference use only....) and my smaller yeti rambler with leather sleeve fits awfully snug.

Edited by Duramax3oh
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BigZed Enthusiast

BigZed

Posted
Posted

Now that the weather is turning for the better does anyone have further towing stats/impressions?

 

 

mikedege Enthusiast

mikedege

Posted
Posted

I've only had mine for 3 months, but so far I can say best truck I have ever owned(my last truck was a 2015 GMC 6.2L 4x4). Best on freeway has been 31.1, my average is ~21-22 around town, 26-27 freeway. So fun to drive, I love it. Hope i can keep this one for a long time!!!!

 

Mike

  • Like 1
Pinnacle Enthusiast

Pinnacle

Posted
Posted
On 3/23/2020 at 8:09 PM, KeysRyder said:

And I live in an area that is 45-55  and I my best 50mile average on the meter,  is 43.5 mpg.   

no you didnt?

KeysRyder Enthusiast

KeysRyder

Posted
Posted (edited)
1 hour ago, Pinnacle said:

no you didnt?

Your right, my bad it was only 42.3.   See attached pic   Probably had  a tail wind.   My first tank I am averaging about 31 on my commute to and from work this week.

 

best50.jpg

Edited by KeysRyder
  • Like 2
6sigma Enthusiast

6sigma

Posted
Posted
19 hours ago, Duramax3oh said:

1. The auto-stop/start feature that has to default to on. I started getting used to clicking it off each time, but installed the eliminator where it defaults to its last setting (OFF!). Best aftermarket purchase easily, don't have to worry about that any more. It's akin to dealing with a squeeky closet door for a few months - taking 10 seconds to finally spray the hinges with WD40 - and then it's silent... and you're like "why the hell did I wait so long to do that".

 

I've been thinking about this, but it looks like you have to take the dash apart to install it? How bad is the install? I'm getting better at remembering to hit the button but still forget sometimes, and then it shuts off at a stop and I think I should get the disabler!

Duramax3oh Enthusiast

Duramax3oh

Posted
Posted (edited)
47 minutes ago, 6sigma said:

I've been thinking about this, but it looks like you have to take the dash apart to install it? How bad is the install? I'm getting better at remembering to hit the button but still forget sometimes, and then it shuts off at a stop and I think I should get the disabler!

I highly recommend it. Like you, I was getting better at remember but would forget occasionally. Not that it's really all that big of deal at the end of the day. But after installing this it's just a weird feeling - the best feeling I can equate it to is when your wife gives you a list of things to do and you actually get them done pretty quickly and cross them off your list and you're DONE (temporarily lol)... 

 

It took some effort but it really wasn't difficult. Just make sure you follow the instructions (there's a great video online) and use painters tape around as to not scratch any surfaces. I also used that opportunity to run a charging cable from the USB port up behind the dash and then it sneaks back out of the driver side a/c vent left of the monitor/screen. I have my phone holder attached to that vent so it makes it easy and hidden having a charging cord right there.

 

I used this one based on recommendation for folks around here:

https://www.autostopeliminator.com/collections/autostop-eliminators-for-gm-vehicles/products/2019-silverado-sierra-autostop-eliminator

 

 

ETA - I just realized.. I have the 40/20/40 front bench which made it significantly easier to install. Having a full console adds a few steps - the video instructions he uses full console.

Edited by Duramax3oh
Duramax3oh Enthusiast

Duramax3oh

Posted
Posted

I changed my phone holder to a magnetic one that’s more recessed than my last. 
 

PS - some of my pictures keep turning sideways like this and I can’t figure out how to rotate them! They are presented normally on my photo album but not when uploading. I’ve even rotated them on my phone trying get a one-up on this upload problem but that doesn’t work 

0D2BDA6B-6C0E-4E4E-A55E-20EA0174BDA8.jpeg

270D3C9E-E85E-4E26-BC70-02BB7067562D.jpeg

yousaveone Enthusiast

yousaveone

Posted
Posted

Range also makes a start stop eliminator that you plug into the OBDII that works with the 3.0

I have had one since day 1 with no problems.

  • Like 1
Pinnacle Enthusiast

Pinnacle

Posted
Posted
6 hours ago, KeysRyder said:

Your right, my bad it was only 42.3.   See attached pic   Probably had  a tail wind.   My first tank I am averaging about 31 on my commute to and from work this week.

 

best50.jpg

wow!

steve841 Enthusiast

steve841

Posted
Posted

I just jumped on the diesel bandwagon with a 2020 Denali 1500.  Was not in the market, but 84 months at 0% allowed me to accomplish some things so I did it.

 

Actually had the 19 Chevy High Country with a 6.2L.  90% of my driving is towing a trailer.

 

With the 6.2L at 70mph, that thing got between 7 and 10 MPG depending on the headwind.

 

Im dying to see how the 3.0L diesel treats me ....

mikedege Enthusiast

mikedege

Posted
Posted
On 3/25/2020 at 11:26 AM, yousaveone said:

Range also makes a start stop eliminator that you plug into the OBDII that works with the 3.0

I have had one since day 1 with no problems.

I couldn't find it, do you have a link???

Thx!!!

Mike

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