To answer original question...
Got this off of gmpartsdirect.com. Some of the sponsors on this forum may be able to do better, but I'm only speculating. number is part number.
17801013 Sport Appearance Package Primed Finish, includes right and left hand rocker moulding, front extention, rear extention, deep sounding performance exhaust system and two chrome dual exhaust tips (Base vehicle contains single dual exhaust pipes)
CORE CHARGE: $0.00
GM LIST: $2,142.85
OUR PRICE: $1,500.00
17801014 Sport Appearance Package Torrid Red, includes right and left hand rocker moulding, front extention, rear extention, deep sounding performance exhaust system and two chrome dual exhaust tips (Base vehicle contains single dual exhaust pipes)
CORE CHARGE: $0.00
GM LIST: $2,371.42
OUR PRICE: $1,660.00
17801015 Sport Appearance Package Phantom Black, includes right and left hand rocker moulding, front extention, rear extention, deep sounding performance exhaust system and two chrome dual exhaust tips (Base vehicle contains single dual exhaust pipes)
CORE CHARGE: $0.00
GM LIST: $2,371.42
OUR PRICE: $1,660.00
17801016 Sport Appearance Package Quicksilver Metallic, includes right and left hand rocker moulding, front extention, rear extention, deep sounding performance exhaust system and two chrome dual exhaust tips (Base vehicle contains single dual exhaust pipes)
CORE CHARGE: $0.00
GM LIST: $2,371.42
OUR PRICE: $1,660.00
This does not include installation or shipping.
Just my 2 cents worth.