I might have some useful insight here, I’m a recent convert from GM being my primary to Toyota. This was mainly due to repair issues I was having with my GM vehicles and being tired of going to service all the time.
I’m a guy who is meticulous on my maintenance and agree that most cars will run reliably with proper maintenance and not using them outside their intended purpose. I own several vehicles for this reason. I had a 2021 GMC Canyon baby diesel for a long time that would randomly go in to limp mode due to an unspecified emissions failure, and it happened so often that I actually ended up getting a lemon law settlement. I kept it but ended up trading for a used 2017 3500 diesel.
I drive a lot so maybe am a good stress test for vehicles, but right away I was having similar failures and repairs from the 2017. Come to find out these issues are not uncommon to GM, and diesel setups, but the repairs included a complete replacement of the turbo system, emissions systems, EGR, sensors etc. Nothing had anything to do with the meticulous maintenance I’ve always provided my cars. Fortunately I had a warranty each time, but if I hadn’t the repairs would have topped over $20,000.
I don’t think the issues were limited to diesel models but it’s definitely soured my opinion of GM. I’ve been a very faithful GM guy since my first truck, a 1991 S10. I’ve had several throughout the years, pickups and trucks mainly, and still have my 1996 Yukon GT. K1500 and love it. But, all my GMs have taken their turn breaking down over the years. I do a lot of repairs myself, but I expect to not have to with a newer car.
I personally wanted something with a solid rep for reliability so I just picked up a 2025 Toyota Sequoia with the third row seat (mainly for the kiddos). I looked at and very seriously considered the new Yukon and XL Denali but personally hated the new interiors, with the touch-capacitive-everything, awkwardly massive screen, no gear shifter, and boring exterior. It still beat the Sequoia in cargo room, but I couldn’t get over the over-modernization. I might be a little old school in that sense, and a lot of people like the uber-tech going into all the new cars, but for what I needed the Toyota hit the spot. And finally converted me from being GM loyal.
There’s been several major GM (and Ford) recalls lately and I haven’t seen much for Toyota. Chat with your local GM service techs, they are probably the best source for the reliability of GM lately and looking forward.