r/Duramax

Considering Sale
▲ 11 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

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
▲ 33 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

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
▲ 13 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
▲ 56 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
▲ 43 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

Duramax LLY

Hi! I’ve got Lots of whitesmoke constant. Unburnt fuel, no doubt. I see railpressure jumps between 25 and 60Mpa, when IPR/FCA is disconnected it jumps to 138mpa so I don’t think it is pump. FICM is changed, running fuel straight from can. The injector balance is in the pictures. I am thinking about changing injector 8, and maybe FCA. 1 is ok normally (around 1) but injector 8 always lay around 5-6 mm^3. Is there anything else I should try before changing injector?

u/Dear-Release-9116 — 3 days ago
▲ 12 r/Duramax

Voltage awfully high

truck will settle at the 2 bar over mark which I’m assuming is 14.8 or so, but relatively speaking it seems to live its life about 1/2 way between 14 and 19 which if I am not mistaken is something like 16.5??? that’s not right. my transmission is experiencing a “high voltage to sensors 1-3” forget the codes but maybe that’s it.

u/JMAnonymous59 — 4 days ago