Is GM actively striving to source parts and assemblies from better suppliers?

I know someone in the automotive brake assembly industry that stated GM continues to use suppliers with poor quality performance.

If this is true...the "REVOLUTION" will be short lived.

Brake Manufacturer Quality Standings (IMO)
1. Brembo
2. Baer
3. Willwood
4. Continental Teves
5. Bosch GmbH
6. Nisshinbo [Toyota]
7. Delphi
8. TRW [GM]

Anybody got the REAL information?