2022 Chevrolet HD Duramax
 

Does anyone have a new HD Duramax to compare fuel mileage with. I purchased a new one a 3500 srw longbox 4x4 High Country and the fuel mileage has only been 10.9 to 11.6 in town driving. I'm still breaking it in so I haven't pulled a 5th wheel yet to see what that brings. I've got 900 miles on it and still the same mileage. Had it checked for any codes or software updates there are non currently.
I know you don't buy these trucks for economy but I traded in a 2020 same truck and it got 18-19 city average (best was 21) and it got 12.9 to 13.5 pulling a loaded 5th wheel. To many other electrical and mechanical problems with it to keep it. Now I'm missing it. Thanks, Larry

Hi Larry, when I bought my 2020 it would get 24-24.9 on road trips.
It’s been in for service work this year,
(61 day in the first 3 months) and thanks to the General it now gets
17-17.5 on the good days.
Can’t seem to cure it so, I think I’ve had enough.
4 Dura-Max trucks in 13 years.
I think GM has decided that I will just be OK with it.
They are wrong.
Your 10.9-11.6 is terrible and they should be able to help that, I would think.
Good Luck, Joe.

My 2021 crew cab 4x4 says 14 on the dash. mostly short trips around the farm. I think the day I brought it home was a 30 mile trip and said 21 or 22.

My 2020 gets about 20-21 (provided it does not regen). There is a recall on it revolving around the regen. I fear that new flash may be the culprit of the change in Joe's mileage.:dunno:

I get about 12-13 with my 28ft enclosed trailer (loaded) if I keep it between 65-70

Tim

My 2020 got real consistent mileage about the same as yours with or without the trailer. I traded it in still under warranty because the dealer had it more than I did at times. Plus it was worth more than I paid for it new on trade in. (blown hydro boost oil all over the floor, 3 sets of battery's, cracked charging terminals 2, pin hole in radiator hose, engine oil leak, transmission oil leak I never fixed, and bad rear shocks to name a few. Now the 2022 getting horrible mileage. Larry

I have 4,000 Miles on my 2022 Yukon Denali 6 cyl turbo diesel. 26 mpg Highway consistently. Pulling loaded trailer cuts it down to 13 to 14 though. I’m happy with that. WAY better then the Escalade that it replaced.

Friend of mine has a 2020 I think, took it in they did an update on the computer and now it gets no better then 16/17. Was getting like 21/22….

I don't have a new one but I do have an 05 4x4 crewcab duramax that I never drive unless I have to tow something.

I have used it on a couple road trips though. It has gotten a best of 20 mpg highway, and gets 15-16 mpg in town. Towing a fully loaded 28ft enclosed gets about 11-12 at 70-ish mph and pulling the open flat bed with a car on it at the same speeds gets about 14 mpg.

I was just looking at a brand new 2022 at the dealer a couple weeks ago. Crew cab 4x4 with an $85k sticker on it. I would have expected they would do better than my 05, but the sticker has me keeping mine.

I am pretty sure my brother's 2014 that I posted for sale here was getting 18-21 unladen. I know he was shocked at how good the mileage was for such a beast of a truck.

He ended up selling to a dealer.

He is out of the Country right now, but will check when he gets back.

Was listed for sale here: https://www.yenko.net/forum/showthread.php?t=169188

Mine's an '04 2500HD CC SWB, and I've seen as high as 26 mpg on flat ground at speed; normally more like 21-22 unladen. Gets around 13 - 15 mpg pulling the trailer, depending on the terrain, which is with about 7500 of enclosed Haulmark trailer with the car inside.

It's approaching 300k miles and smokes a bit, but the POWER!! I pass a lot of Dodge Rams going up hill.

Is my truck really 18 years old now?

(Ack!!)

K