Consider what happened to Saturn a few years ago. The division changed from a couple of reliable, well-built models and created a SUV, a larger SUV, larger sedans, and a sporty convertible. Once they got away from focusing on what they did well they became no different from the other GM divisions, and quality (and sales) suffered.
Find what you do well, and stay with it.
Saturn was run completely differently than all other GM plants. It was it's own entity. My history might be a bit foggy here and this isn't meant to be an exhaustive history lesson but as I recall, that was Roger Smith's baby. When he retired there was pressure to bring it in line with the rest of GM's operations. When the lavish hourly bonuses dwindled and the good times faded, then there was pressure from the hourly folks to be more like the rest of GM. I can't remember if Saturn was ever "profitable". But when the founder and his vision retired and people took over that didn't share it, it was only a matter of time before it became just another division of GM.