“GM has been making substandard vehicles since the 1950’s.”
Excepting, of course, my 57 Chevy 283, my 58 Chevy, my 59 ‘vette, and my 4-speed 68 GTO convertible. Other than those, you may be correct ;^)
I was pretty fond of my ‘70 Formula 400 RamAir III, with the Muncie M22 “Rock Crusher”.