Here is what mine looks like. Chances are it's a fluke and just on mine but it doesn't hurt to crack out a level and make sure your 2008 reservoir is level as well.

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2008 Mysterious GXP (MoMo)
Solo Mach "Shorty" and Solo High Flow Cat
ADR wheels, XenTec headlights/fogs.
Badges removed, tinted windows.
Pontiac symbol overlays all around.
VIN 100541 - Drove it home 7/13/07. As of today; 26,000 Miles