Looking for used left side air vents, the parts call it a "BEZEL. Instrument Cluster". The part number is 15823925.
Here is a link to an expanded parts (it is part #53 in this view)
INSTRUMENT PANEL PART 1. Fits: Grand Prix | Nalley Buick GMC Brunswick
Here is the blurb.
053 BEZEL. Instrument Cluster
BEZEL,I/P CSTR TR PLT(EBONY). Required: 01
For: WC BRIGHT INTR ORN(B3Q) (2008-2008) (2008 - 2008).
For: WP BRIGHT INTR ORN(B3Q) (2006-2008) (2006 - 2008).
For: WR (2006-2006) (2006 - 2006).
For: WR BRIGHT INTR ORN(B3Q) (2007-2007) (2007 - 2007).
Also here is a picture.
06vent_zpsaa1dc056.jpg
