Originally Posted By: dwcopple
I thought SC'd cars were GTP's not GT's
I thought that too but looks like they changed it this year
Originally Posted By: wikipedia
For 2006, A "Special Edition" body package was added which came with a same colored grille, new front and rear "diffuser" type bumpers, lower side skirts, and wheels. The three options are the Grand Prix, powered by the 3800 Series III V6, the GT, now powered by the 3800 Series III Supercharged V6, and the GXP, powered by the LS4 V8. The GTP designation was discontinued from the Grand Prix line and applied as the top trim of the G6. All General Motors 3.8 Liter Buick V6 powered cars become the first SULEV compliant vehicles. That model year gave it the car's final update by adding GM badges near the front doors until the Grand Prix was pulled from Pontiac's lineup after the 2008 model year.