Have 1976 1 ton 4 speed dually Chevy truck with over 348,000 miles on it
Have 1979 Buick station wagon with over 221,000 miles on it.
Bought 1965 Pontiac wagon new & put over 444,000 miles on it & sold it to a restorer in Sweden.
Had 1957 Pontiac I put over 50,000 miles on.
NOT unhappy with GM-—BUT these were ALL OLDER generation vehicles.
I am less than impressed by those numbers as my 1987 Jaguar XJ6 has over 300K and we all know those weren’t paragons of reliability.
Had lots of GMs that left me stranded or raided my bank account, though - older and newer.