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Old 06-23-2021, 08:32 AM   #1
Txhuntr2
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Default 2021 Duramax/Allison Good to Go?

Any 2020 or 2021 Duramax owners on here? How do you like the truck?

I'm wanting to trade my 2019 1500 Trail Boss for a new diesel. Looking at a 2021 sierra AT4. I read that some people had problems early on with the 10 speed "Allison." Have those been cleared up? Are there any other known issues with this truck?

Please advise.
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Old 06-23-2021, 09:13 AM   #2
Hogwild84
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I have a 2020 denali Duramax, I do like it. I switch back from GM to ford and the new denali is a nice rig. My only complaint is the seats are hard as a rock. The rest is good to go. No issues with my 10 speed yet, but it is not deleted and tuned.
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Old 06-23-2021, 09:39 AM   #3
HELLRAZOR
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2020 denali dually love it!
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Old 06-23-2021, 09:59 AM   #4
TX03RUBI
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My brother in law just switched from a 2019 King Ranch 6.7 to a 2021 GMC SLT and he likes the truck a lot. Pulls a 37í bumper pull, and likes the way it handles it.
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Old 06-23-2021, 01:41 PM   #5
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I don't plan to delete it or hot rod it. Just want more capability than my 1500 for towing my camper, hauling a pallet of corn, etc.
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Old 06-23-2021, 01:43 PM   #6
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Quote:
Originally Posted by TX03RUBI View Post
My brother in law just switched from a 2019 King Ranch 6.7 to a 2021 GMC SLT and he likes the truck a lot. Pulls a 37í bumper pull, and likes the way it handles it.
Did he get the 2500 or 3500? Long or short bed? I'm steering towards the short bed 2500 for towing my bumper pull. I know a 3500 long bed would sway the least but as my daily driver in the city that seems like too much.
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Old 06-23-2021, 01:57 PM   #7
Fordnandez
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Apparently all the issues with the new 10 speeds have been taken care of. Also just FYI the GM transmission and the Ford transmission are the exact same besides the bellhousing and torque converter. GM just brands it as an Allison.
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Old 06-23-2021, 03:54 PM   #8
TX03RUBI
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Quote:
Originally Posted by Txhuntr2 View Post
Did he get the 2500 or 3500? Long or short bed? I'm steering towards the short bed 2500 for towing my bumper pull. I know a 3500 long bed would sway the least but as my daily driver in the city that seems like too much.
Both trucks were short bed 3/4 ton diesels. I know he’d rather have the long bed for towing that long of a bumper pull, but doesn’t want to deal with driving it daily.

If you pulled that trailer with a half ton then you’ll be extremely happier with a 2500 diesel short bed. The truck weight alone will make worlds of difference.
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Old 06-23-2021, 04:04 PM   #9
Sunnylab
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I did exactly what you are doing end of last year. Traded a 2019 Trail Boss for a 2021 GMC Duramax AT4 2500.....best decision i've ever made regarding vehicles. Absolutely love the truck.
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Old 06-23-2021, 07:16 PM   #10
AntlerMax
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Got a 2020 Chevy 3500 SRW Long Bed 4wd last August.

Have put 48,000 miles on it pulling trailers almost every day.

Love the truck and haven’t had any problems so far.
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Old 06-23-2021, 08:29 PM   #11
bphillips
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We have a 2021 at4. It’s awesome
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Old 06-23-2021, 08:55 PM   #12
efaurie
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Love my 2020 At4
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Old 11-30-2021, 03:55 PM   #13
Txhuntr2
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Follow up. I’ve been driving a 2022 Duramax 2500 Denali for a few months and it’s awesome. No complaints. Pulls my 7000lb camper like it’s not there, hauls a pallet of feed easily, etc. Good to go.
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Old 11-30-2021, 11:41 PM   #14
Boyd1212
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Quote:
Originally Posted by Txhuntr2 View Post
Follow up. Iíve been driving a 2022 Duramax 2500 Denali for a few months and itís awesome. No complaints. Pulls my 7000lb camper like itís not there, hauls a pallet of feed easily, etc. Good to go.
I had a 22 superduty on order then it got pushed further out, so I canceled it. Found a 21 duramax Carhartt edition on the local lot with 4400 miles on it. Iíve had it a month now, and I absolutely love it.
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Old 11-30-2021, 11:46 PM   #15
bentman
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Wait 1 more year the new 2500/3500 will be out. The L5P will also have a HP upgrade
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Old 12-01-2021, 10:03 PM   #16
Mike D
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I canít help but leave this here.




Sent from my iPad using Tapatalk Pro
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Old 12-01-2021, 10:13 PM   #17
BBRU
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Wait until the 2023’s.. the 23 duramax will be the most powerful diesel on the market. 505hp and 1085tq
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Old 12-01-2021, 10:47 PM   #18
Kingfisher789
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Can’t really go wrong with an Allison. Plus the Chevrolet interior is best.
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