1. It has its own concept different from Ford concept.
2. It does not pay exhuberant amount for its executives
3. It has program to make its workers happy
4. It took over 20 years to solidify its reputation as reliable & cheap cars
5. It never stops progressing and innovating
6. it has one of the most efficient and cutting edge supply management system
GM did none of those.... thus continues to fail. GM has one of the most inefficient supply system, continues to pay exuberant amount to CEO's, succumb to UAW, place priority on looks instead of functionality, and so many more. That's why this is a common subject for business classes. Toyota Model is a well-studied case for business students. Who the F***! want to buy a shit American car for same price as japanese car (but cheaper maintenance and cheaper parts)? Exception is Cadillac. There's a reason why "Cadillac" is universally-known term.
something for you to read why Toyota is winning -
Amazon.com: Toyota: Books or
Let me google that for you
btw - you might want to check on what you just said. But that's ok... since you have no business background