BuckWallace

I have about 27k on my 2024 with the L8T and 10sp and haven't had any issues so far.

This happened to me with my gasser on the 2nd "free" oil change. Stupidly I never checked the dipstick and when I changed the oil next myself I drained out 10 quarts (Duramax spec). I, too, thought they put the wrong oil in so I sent a sample in to Blackstone, but luckily they confirmed it was 5W-30. I'm assuming the oil change "tech" saw an HD truck and just did the "standard" 10 quarts.

What gives you the impression it's not a reliable engine? Honest question.

Other than the ride comfort and fuel mileage I don't think you'll regret your 2500! If you're on level ground doing ~60 you can definitely get 17, but anything over 65 and the mpg suffers. I'm definitely jealous of your $3/gallon. Here in Oregon it's $4.70 at Costco (generally the cheapest for top tier)—I put in 28 gallons today and it cost me over $130...

Yes.

I have this one as well—works great.

The only concern might be the pin weight on that 5th wheel. Some 2500s don't have a very high max pin weight, so that could be the limiting factor. Also, your L8T can handle the overall GVWR, but if you're towing that much very frequently your quality of life (towing) would be much more pleasant with a diesel. Good luck with whatever you choose!

Was this created by GM?! Just kidding, but this is interesting. I change my oil every 5k miles or 6 months (I don't put a ton of miles on my truck), and I hadn't had any noticeable consumption on my 2024 L8T until this last oil change at a little under 25k miles. This OCI was about 4500 miles and I lost about 1/2-3/4 of a quart, so well within this "normal" consumption range. I was a little bummed to see that much gone since I hadn't noticed any loss before, but I'm not going to worry too much about it.

Even with the hit on selling/trading in, you're almost certainly better off just doing that and buying a dually.

I would think the reaction gearset noise (which is what I believe the noise I'm referring to is) shouldn't be heard in park. Only in the gears mentioned in the TSB.

Yes, the new one is definitely shaking way less.

Ha, I had my driver side mirror replaced last year due to excessive shaking (sounds like another common issue). It, too, closes slower than the passenger side, but maybe only by ~1 second. Hopefully the parts lottery is kind to you this time.

Yes, I believe it's TSB 24-NA-262. I'm with you on not messing with it if a replacement isn't going to get rid of the noise. If mine were performing differently or getting worse I'd definitely bring it up, but it's still driving great so I don't want to mess with it. I'll probably at least bring it up to the dealer before I'm out of powertrain warranty, but for now I'm just going to keep enjoying the truck!

Keep us posted. My 2024 gasser has had the "whine" in gears ~3-6 since new. It hasn't gotten any worse and still shifts totally normal, so I haven't made a big deal about it to the dealer. GM-techlink says the following about the 10L80, so I wonder if it's a similar normal sound from the 10L1000s: Reaction Gearset Whine A whine from the reaction planetary gearset may be heard during light to moderate driving conditions, especially when the reaction gearset is in 4th or 5th gear (20-35 MPH) (32-56 KM/H). (Fig. 19) The frequency of the whine will change as the transmission shifts gears due to component rotation speeds changing. Use the manual tap shift feature to shift through the gears to verify which gears have a whine sound present. TIP: A whine sound from the reaction gearset should not be present in 7th gear due to the 1:1 ratio and the gears being locked. If a whine is present in 7th gear, check other components.

That's a good point regarding max tongue weight on the half tons. Mine loaded is around 850.