GM has not ever really been as "performance" as Dodge and Ford.
I guess GM figures the Vette, Z28, Trans Am, Now the GTO are all the performance they need.
I mean just look back.... The new Silverado SS was supposed to be this mean machine.. but instead they made it a slow Club Cab. Granted it has AWD and room for the family but it will not stand a chance against a Lightning or a SRT-10 Truck.
Maybe it is due to their "luck" remember the SYCLONE and TYPOON they had a lot of problems with those trucks. And usually when GM makes a performance vehicle it is EXPENSIVE! Like the Grand National and the Firehawks.
But I am with you...they need more of a performance division.
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S's? Oh it has SS's!!!