I don't understand the comment that GM pulled their endorsement of Dexron VI, when it is their own specification.

What you may be seeing is that different manufacturers use a variety of transmission suppliers in different vehicles, and each transmission has specific fluid requirements, no matter who makes the vehicle.

Dexron VI isn't a universally compatible fluid with BMW (except for power steering pumps) but it is used in some GM-built transmissions that BMW uses.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue