Ok, I've been hearing alot about "those crappy rims", the "boring design" of the Cobalt SS 4-door, etc.
Here's what I propose:
Chevy should begin offering a variety of rims... 2-3 basic types (including the ones they have now) come standard, but the others should cost a little bit more. Also, Cobalt and Malibu SS rims should be standard 18", but cost more if the person wants 19's or 20's. (Remember, Cobalt SS=same target audience as the Civic Si, SRT-4, etc) The Impala SS rims should start at 19" and go up to 22" factory.
Duel exhaust on all SS models, from Cobalt up... 2, 4, or 5 door models. Duel exhaust outlets only!
The Cobalt SS 4 door should be far more aggressive... take tips from the coupe!
The Malibu SS should have the standard 240 HP engine, but option of a 280-300 HP turbo'd 6.
The Cobalt SS (2 and 4 door) should have an option to upgrade to AWD and 260+ HR turbo-charged off factory (or even an upgrade to a 275+ HP I5 engine).
The Impala SS should have an option to bump the HP to to 340 or so, if not more, and an option to add AWD as well.
The Malibu's interior needs to be completely scratched for the SS, with a new interior with a freshened design, all-new material, and Mazda/Honda Accord-level quality and sportiness.
Chevy should have an minited-production Equinox SS. It wouldn't necessarily be for market share, but rather a show of Chevy SS engineering and pioneering - there's no RAV4 or CRV sport version. This Equinox should come with a 300 HP I5 engine, an extremely taunt suspension, 20x10 rims, sporty interior and sports seats, and aggressive facial and updated/sportier rear hancho.
The next Silverado SS should be standard with regular cab, but extended and crew cabs can be optioned in. It should have a 7.0L+ engine pumping out a minimum of 450 HP, with AWD/4WD as an OPTION. No racing strips as they said in their All-Star game commercial. It should be understately aggressive. In-your-face, but not overwrought.
The Trailblazer SS I think should add a bit more aggressiveness to its design, and bump it up to an even 400 HP.
That's my take in a nutshell... ask me if ya want me to go more in depth or have any questions! Any comments/feedback is welcome!