General Motors has created a premium version of Theta for luxury applications.
Reports differ, but the consensus is that it is a combination of the current Theta and elements of the new Epsilon 2 architecture.
Thus this platform is sometimes also referred to as Theta-Epsilon (GMT166).
 Theta Premium supports larger models than the standard platform.

Vehicles using Theta Premium:
2010-2016 Cadillac SRX
2011 Saab 9-4X
General Motors has created a premium version of Theta for luxury applications. Reports differ, but the consensus is that it is a combination of the current Theta and elements of the new Epsilon 2 architecture. Thus this platform is sometimes also referred to as Theta-Epsilon (GMT166).  Theta Premium supports larger models than the standard platform.
Vehicles using Theta Premium:
2010-2016 Cadillac SRX
2011 Saab 9-4X
GM Theta platform