I have a 2023 Colorado Trail Boss with the 2.7L and I have no complaints other than the fuel economy. It's no better than the 5.3L in that regard. Plenty of power though.

Here is a 1-owner garage kept 1986 Suburban w/89,696 org miles, 5.7, it is located in Hershey, PA, a friend of mine is going to put it up for sale soon.

The newer GM small cube turbo engines are pretty trick, my takeway is they have reduced the number of parts. In this video he goes over a cutaway engine, describing features like priority oiling to the turbo, and lots of other cool stuff.

https://www.youtube.com/watch?v=JLxeBzrhOHQ&t=436s

That’s cool, 4x4?
What’s he asking?

It’s 2 wheel drive.

So now the belt replacement is now at 200k?

When are the lifters guaranteed to fail? I have 4 and need to know when to plan for this.

On my 2015 GMC Sierra 5.3 the lifter- camshaft failure happened at 110K miles. A 3K dollar repair bill. 👎👎👎! I’m not waiting for the transmission failure, going to sell soon.

How many times have you changed the fluid in the trans ? I bought my 2011 with 51k and immediately dropped the pan and installed a drain plug. I then dropped and swapped 4 quarts at a time, every 100 miles, until I had run 12 quarts out. Fluid looks like new. I now drop 4 quarts every 3rd oil change (about 20k) and have never had an issue, and I've pulled my car and camper trailers over 20k of the 84k I've driven it. Mine is a 6 speed, is the 2015 the 8 speed ?

I rebuilt the trans in our 2004 Suburban at around 165k miles..with some advice from folks here I upgraded a few of the internals. Also installed a trans temp gauge and we are using a hi-perf synthetic fluid.

Your idea of 'freshening' the tranny fluid is a winner...just need the drain plug.

----I have a real soft spot for this era Subby, especially a 2-wheel drive. Don't need it but might just have to have it! Do you have an idea what he's looking for, money wise?....Bill S

Any idea why the factory does not put drain plugs on the transmission pans? Seems like a no-brainer to have one on there.

Have seen a few PG transmissions from the 60s with drain plugs. Otherwise, no.

The "automotive expert journalists" all used to say it was to make certain that instead of just drain and fill, you would be more likely to do it "right" and change the filter. It STILL would have made it much easier, and less messy if I could drain all the fluid (or 99% of it) BEFORE removing all the pan bolts.

Now, it is even worse. Some cars don't even have a fill tube, but at least they have a drain plug. I had to drop the pan and valve body on my son's BMW to replace some rubber tubes (certain they are not actually rubbber... but sure look and feel like it) that had "shrunk" slightly, losing their seal and causing the car to not shift properly. The ONLY way to fill the transmission was to pump fluid in from underneath. What a frigging cluster fluff. Of course, no fill tube means no dipstick either.