r/Duramax

Considering Sale
▲ 13 r/Duramax+2 crossposts

Considering Sale

05 zf6 manual trans high mileage but new fuel system including injectors egr delete and tuned never abused accepting offers zero rust cali and az truck.

u/Happy90sCamper — 2 hours ago

14-18 rear bumper plug and play for a 03 Duramax

The first picture is from a 1500 and I was wondering would the 14-18 rear bumper also work on my 2500hd, are the 1500 of the 2003 generation the same as the 2500hd exterior wise? If so I’m looking to get this chrome rear bumper, thoughts? Or would you recommend the stock one of this generation, I currently have a bland roll pan on it and I’m looking to replace it with this one and giving her some chrome back maybe some chrome side steps as well in the future.

u/Alt852805 — 7 hours ago

Lly overheated with 5 tons of gravel up a mountain at 45mph. Never got that hot before or after.

Is this normal? Should i replace the radiator even though all fluids are changed regularly?

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u/kaos207 — 19 hours ago
▲ 31 r/Duramax

Higher milage LLY?

Anyone have a higher milage, daily driver LLY?

Any secrets to keep it running like a top other than AMSOIL?

u/kaos207 — 1 day ago

AITP vs. VSE

In the market for weight loss on my ‘21 L5P. I’m down to choosing either AITP or VSE, leaning towards AITP. Anyone care to weigh in on one vs. the other? Thanks.

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u/Desperate-Contest542 — 18 hours ago

Looking to buy boyfriend a used duramax.

Im looking for a used deleted and tuned duramax diesel 2017-2020 gmc/chevy.

I am shopping between upstate ny to Alabama. What are good places to buy?

I look on marketplace, but would rather finance via dealer than take out an auto loan thru bank.

Can put $20k down, plus another 8-10 in trade in, so looking for 35-50k

Can you help point me in the right direction?

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u/mystical-bean — 24 hours ago
▲ 14 r/Duramax

Which of these is a better overall truck/deal?

Looking to pick up a diesel and these are the two I have decided on going to look at, any opinions?

Red truck is a 2007 lmm that is deleted, tuned, 226k miles for $12,000

Silver truck is a 2012 lml that is also deleted, tuned, 245k miles, this one has a cp3 conversion kit, lift pump, new radiator, new turbo, new injectors, cognito uppers, forged tie rods, also for $12,000.

u/Difficult-March5434 — 1 day ago
▲ 55 r/Duramax

I’m considering buying this truck

1 Owner, 150k miles, 6.6 duramax, not california emissions, asking 25k online, waiting on carfax and service records atm.

What do we think?

u/gitwaxed — 2 days ago
▲ 45 r/Duramax

2026 2500 at4x

Just picked it up after refusing the 3rd motor replacement in a 2024 atx 6.2.

u/hunterguy2018 — 2 days ago
▲ 8 r/Duramax+2 crossposts

2.8 owners, how many miles do you have on your trucks, and have you had any issues?

Looking to purchase a 2018 canyon with the 2.8. Anyone have one and have any major issues? What’s your mileage? Would you recommend buying one?

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u/hjjhjjnk — 2 days ago
▲ 12 r/Duramax

6.6 Duramax Engine Stand Adapter

Hey everyone, I messaged the mods to check if this was okay but never heard back, so if this isn’t allowed I’m happy to remove it.

I run Shively Machine Works and make the 6.6 Duramax engine stand adapter I’ve attached photos of. Normal price on it is $179.99 but I’m running an Independence Day sale this weekend, so the adapter is $148.02 shipped in the lower 48.

Made from 3/8” steel plate and 2 1/2” x 1/4” square tube. It is verified to fit on the Daytona 1500 lb and Pittsburgh 2000 lb engine stands, and should fit other stands with a rectangular mounting plate and 7 7/8” x 4” hole pattern.

If you’re interested in one please comment or message me and I’ll send you my website, or I can invoice you for it through PayPal Goods and Services

u/shivelymachineworks — 1 day ago
▲ 2 r/Duramax+1 crossposts

What’s next

After I do new U-joints, grease the slip yoke, if it still clanks what could be next?

Happened on my way into work this morning just went to a stop and heard it, does it after stop/accelerate or park/drive consistently now unless I’m real easy on it.

Did have a slight squeak beforehand which I thought wouldn’t be u joint but now I rly suppose it is.
Thanks in advance.

u/Impressive_Click8594 — 2 days ago
▲ 1 r/Duramax+1 crossposts

2.8L Duramax DEF delete

Good day! I have a ‘18 and am constantly throwing DEF codes. Have 107k and don’t want to spend $1k on a fix if I can delete. Has anyone had success with deletes for highway use primarily?

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u/OzarkRussRuss80 — 2 days ago

I need help

I have a 22 GMC 2500hd and when I am parking or turning slowly my truck will start to shudder or vibrate like it is struggling please help

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u/Ambitious_Brick6427 — 2 days ago

05 duramax fuel issue

I have an 05 duramax that I constantly have to prime for it to start. If it sits for a few days it will start for about 3-4 seconds and then die and won’t start unless I prime it. Sometimes if I park it and run into a store it will do the same thing except if I crank it for about 3 seconds it will fire up. Is this possible a fuel leak somewhere that’s causing these issues?

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u/Equal-Addendum-1513 — 3 days ago