Mission: To equip 3.0 Duramax diesel owners with comprehensive, technically-informed knowledge—sharing real-world performance, limitations, and specifications—so they can make decisions that work for their specific needs.
DemonWorks was founded by Greg, a GM tech with 20+ years of dealership experience and a Duramax owner and enthusiast. What started as a passion for the 3.0 Duramax diesel platform became the definitive resource for hands-on technical content, product testing, and real-world insights.
Nelson Speed Co. unites automotive enthusiasts through car reviews, local car shows showcasing standout builds, and coverage of racing events.
From teardown analysis and Installs to towing guides and maintenance tutorials, every piece of content comes from a technician's perspective. Whether you're researching your next modification, troubleshooting an issue, or simply want to understand your truck better, you'll find the depth of information needed to make informed decisions.
DemonWorks - 3.0 Duramax Diesel LM2 LZ0
Charge air cooler radiators in stock and ready to go! We finally got caught up on fulfilling the prior orders and now have plenty available to ship today! Https://www.demonworkshop.com/
2 days ago | [YT] | 34
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DemonWorks - 3.0 Duramax Diesel LM2 LZ0
We have LZ0 Thrust Bearing Cause of failure answers !!! (for this engine)
1 week ago (edited) | [YT] | 91
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DemonWorks - 3.0 Duramax Diesel LM2 LZ0
LZ0 ?!
1 week ago | [YT] | 54
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DemonWorks - 3.0 Duramax Diesel LM2 LZ0
4 injectors still holding strong !!! 💪 air hammer, puller, sledge hammer …. I have 1 last idea. Edit- we will have this engine apart tonight! I will discuss this in detail on the podcast - @DuramaxPodcast
2 weeks ago (edited) | [YT] | 52
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DemonWorks - 3.0 Duramax Diesel LM2 LZ0
Engine teardown video has been delayed due to severely seized fuel injectors! They are putting up a hard fight, but in the end, we will win. 4 more to go.
2 weeks ago | [YT] | 59
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DemonWorks - 3.0 Duramax Diesel LM2 LZ0
Did you know there are currently 4 variations of the ACDELCO PF66 Filter? I have 3 of them with the 4th on the way. Video coming soon !
2 months ago | [YT] | 83
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DemonWorks - 3.0 Duramax Diesel LM2 LZ0
New Podcast Episode is up - Warning if you are running Mobil 1 0w30 - Thrust bearing isue with the 24 as well? Our first discussion on the 2027 trucks coming out https://youtu.be/n1s4cmoBLoQ
3 months ago | [YT] | 7
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DemonWorks - 3.0 Duramax Diesel LM2 LZ0
Fuel caps are back in stock ! These sold out quick last time they were available. I have 40 en route right now.
www.demonworkshop.com/products/2020-2025-gm-3-0l-d…
5 months ago | [YT] | 49
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DemonWorks - 3.0 Duramax Diesel LM2 LZ0
Question ! 🙋♀️ are the shorts being uploaded good / bad/ don’t care? …… I’m using a program to cut up longer videos…. Just looking for some feedback from you regulars !
5 months ago | [YT] | 40
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DemonWorks - 3.0 Duramax Diesel LM2 LZ0
Great news !!! I have more inventory en route. www.demonworkshop.com/products/ppe-3-0-duramax-eng…
5 months ago (edited) | [YT] | 35
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