 U.S. News Rankings & Reviews | Cadillac STS-V and Pontiac G6 GXP absent from 2010 GM lineup Motor Authority These include the Cadillac STS-V, the high-performance variant of the STS, and the Pontiac G6 GXP. The 470hp (350kW) STS-V has been a sales disappointment for Cadillac, and considering that it retails for a hefty $80000 it's not difficult to see why. ... GM Eliminates Several Performance Variants for 2010 GM throttles back on performance cars for 2010 GM Starts Killing Off High-Performance Cars |