Comp G. Specifications for 2004 and some of 2005.
1. Tap Shift
2. Magnasteer II
3. HUD
4. Performance Tuned Suspension
5. Light weight Machined Finished 10 spoke wheels (could be upgraded to 5 spoke wheels Curved Chrome in 04 and Polished 5 spoke wheels in 05)
6. Red Brake Calipers (brakes are the some of all 04+ GP)
7. Stabilitrak Sport
8. Competition Group badge on the trunk under the GTP badge PN 10342485
9. Comp G badges on the doors (late 04 and all 05's have these) PN 10350911
10. 3.29:1 final gear ratio
11. P225/55VR17 Performance Tires
12. 5 button DIC
13. 142 top speed limit (126 for GTP's without Comp G)

Springs are the same for all 04 and 05 cars.
Rear Stiffer Struts PN is 88955413
Front Stiffer Struts PN is 88955411

The front sway bar for is the same for the 04's and 05's PN 10346886

2004 rear sway bar is PN 10274610 (same as the GXP sway bar and is a the better bar of the two years)
2005 rear sway bar is PN 10351314 (and is diffrent from the 04)

Wheels/Red calipers:

All wheels were 17 inch by 6.5 inch.

2004 and 2005 Light Weight Machined Finished 10 spoke wheels:

These were Comp G only wheels.
Colors available on Comp G:

Original colors -
Black
Ivory White
Sport Red
Polo Green
Galaxy Silver

April 03 - Fusion Orange added

August 03 - Greystone & Sedona Beige added

February 04 - Fusion Orange pulled from the lineup

05 colors - Polo Green Deleted; Fusion Orange returns; Blue Green Crystal (bleen) added

February 05 - Fusion Orange deleted again from the Grand Prix Color line up.

Important Dates in Comp G History:

February 03 - First Comp G's hit the show room floor.

March 04 - Comp G door badges added.

June/early July 04 - (which is a little earlier than usual for a non-changing model) The first 05 Comp G's hit show room floors.

February 04 - Production of the Comp G stops to make way for the GXP.

Production Numbers:

There are a lot of holes here so help me out.

For 2004

There were 131,551 GP sold

GT1: 27%
GT2: 52%
GTP: 7%
Comp G: 14% Giving us a total of 18,417 Comp G's Sold in 2004

For 2005

260HP and 280lb/ft of torque is good for right now.