Looking at a new truck, dont know anything about 2024 5.3 vs 3.0Ldiesel.

Googling around doesnt come up with much as far as specifics on reliability. Everyone praises the diesel for fuel milage but I dont see much about if thats transmission is good or not. And how about the 5.3gas engine? They both run a 10 speed transmission. My local transmission shop say theyre okay, not great... but okay. ?

I did see the 3L diesel has a stupid timing belt location. So $3000 change ever 100miles or w.e.

Other than that any wisdom you can lay on me would be appreciated.