General Motors is trimming its model lineup to get rid of its underperforming sport models across all its brands. Just yesterday, it was revealed that Chevrolet will no longer offer the Impala SS variant for 2010, nor will it offer the 2010 Cobalt SS sedan.

Following in the footsteps of these two will be two more GM models facing the axe, for 2010 at least. These include the Cadillac STS-V, the high-performance variant of the STS, and the Pontiac G6 GXP. The Cobalt SS Coupe and HHR SS Panel are also expected to disappear, though these two will stick around until the end of calendar 2009 or early 2010 at least.

The 470hp (350kW) STS-V has been a sales disappointment for Cadillac, and considering that it retails for a hefty $80,000 it’s not difficult to see why. The cancellation of this product means that Cadillac's flagship performance car will be the CTS-V, which has silenced a number of critics with its reasonable price and scintillating performance.

The G6 GXP was available in both sedan and coupe bodystyles

The G6 GXP was available in both sedan and coupe bodystyles

Also facing the chopping block for 2010 will be Pontiac's G6 GXP. The G6 GXP was the most powerful model in the G6 lineup, featuring close to 250hp (186kW). We doubt too many people would be shedding a tear over it, however, especially considering Pontiac will be phased out by the end of 2010.

But GM is not totally writing off performance. There remains the SS trim for the 2010 Chevrolet Camaro, Cadillac still has the CTS-V, and there's always the Z06 and ZR1 versions of the Corvette supercar.