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&t=530">8:50</a> "we made the engine bigger so it's more efficient"<br><br>I'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. They need to fix that first.
8
@georgestweeter · 2 days ago
Some people complain about it being "de-tuned" 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're great engines for that kind of work and if you keep oil in them they'll easily do 500k miles. The thing is, they like to consume oil and don'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't regularly checking oil, they might be low and destroying their engine. I've seen 4 of those 6.7s fail in my 6 years working on them, all because they didn'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'd tell them, "check your fucking oil once a week and top it off as needed or something is going to fail." 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, time will tell us how good this new diesel will be. God help the first customers
15
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