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The 8.3L Duramax Is Even CRAZIER Than We Thought! — *Diesel Mechanic Review*

129K views · Sep 27, 2026 · People & Blogs

Comments · 614

  • @larrylefebvre2237 · 3 days ago

    Just in time for $10 a gallon diesel.

    231

  • @tamrielterror3800 · 3 days ago

    People keep complaining that it only puts out slightly better numbers than the powerstroke but I love a detuned engine that should be more durable. If only GM can figure out their transmissions it could be the best HD truck on the market.

    156

  • @Ovfr · 2 days ago

    I skipped the other truck-youtuber's videos on this engine because I only wanted to hear you talk about it. Love your content man

    94

  • @Kenneth_R · 2 days ago (edited)

    I will be impressed when their engines and transmissions dont grenade. People want reliability, serviceability and peace of mind. Hopefully these new drivetrains deliver.

    38

  • @Eyore82 · 2 days ago

    Finally.. a channel I actually care about, reviewing the 8.3

    6

  • @Mastermindyoung14 · 2 days ago

    <a href="https://www.youtube.com/watch?v=cboIPucAZoM&amp;t=530">8:50</a> &quot;we made the engine bigger so it&apos;s more efficient&quot;<br><br>I&apos;ll wait til independent testers paying $7/gallon can verify this....

    6

  • @mojo4376 · 3 days ago

    Don’t forget, current Rams have valvetrains that like to destroy themselves. &nbsp;They need to fix that first.

    8

  • @georgestweeter · 2 days ago

    Some people complain about it being &quot;de-tuned&quot; Im a diesel mechanic that works on semi trucks, dump trucks, box trucks, crane trucks, and the like. I rarely touch pickups. Almost all 26000lbs straight box trucks made in the last 15 years have a de-tuned 6.7 Cummins (or PX-7 Paccars which are just a 6.7 Cummins painted black with a Paccar badge), making about 300HP and about 600ft/lbs. They&apos;re great engines for that kind of work and if you keep oil in them they&apos;ll easily do 500k miles. The thing is, they like to consume oil and don&apos;t have any kind of level sensor to warn the driver and (varies depending on oil pan) only have about 4 gal of oil in them, so if the owner isn&apos;t regularly checking oil, they might be low and destroying their engine. I&apos;ve seen 4 of those 6.7s fail in my 6 years working on them, all because they didn&apos;t check oil and ran them low regularly.<br><br>One customer every oil change there would only be 2 gal or less oil in it and we&apos;d tell them, &quot;check your fucking oil once a week and top it off as needed or something is going to fail.&quot; After servicing that truck a few times a rear for a few years it was towed over and we found their turbo bearings had failed. We replaced it and 6 months later they spun a main bearing and seized their engine. Check your fucking oil.

    17

  • @AuralioCabal-nl8gi · 3 days ago

    The Fuel bill will be a monster too!😂

    44

  • @Brock6095 · 2 days ago (edited)

    I’m no GM fanboy, but I must say I’m loving the idea of a big beefy engine built right! Props to them! Now don’t get me started on the SCR/ DEF system though…

    18

  • @trevorhanes3002 · 2 days ago

    This motor is seeming to be a tuner paradise in a couple years 😮

    4

  • @jburch1544 · 2 days ago

    Ok GM, &nbsp;time will tell us how good this new diesel will be. God help the first customers

    15

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