If you take the Corvette out of the equation, the best vehicle GM is offering right now is the Chinese assembled Buick Envision. Kind of sad if you really think about it.
1/2 ton trucks really slipped not long after the shift to Mexico.
I'd follow this up with the Enclave/Traverse/Acadia.
The 3/4 and 1 ton trucks are on par with the Mopar and blue oval offerings.
The rest is iffy...
I see them at their worst though. Nobody takes a perfectly running vehicle in.
I know the Japanese cars never have failures according to the internet, but they are having many of the same issues plaguing the other manufacturers right now. Śhìt products.