Can't really tell from the small pic but it looks like a speaker pick up for use with cellular phones, I have a similar unit in my rig for the new hands free driving law that came out ugh!
Brian
Nor-Cal
2000 Chevy Silverado 1500
6" RCD Lift
315/75/R16 BFG All Terrains
Alpine 7" DVD Reciever
Jbl Componet Door Speakers Front and Rear
4 10" Jbl Subs
Led (Blue) Cluster Gauge Blulb Swap
Dell Studio Hybrid Digital Media Server
Cobra CB
Twin Bearcat Scanners

Speaker or air freshner are my guesses. It looks aftemarket, it doesn't match the rest of the colors.
Trevor - Huntington Beach, CA
2007 GMC 2500 4X4
Its the mic for onstar.
2005 Sierra 1500 Z71 Crew Cab
Pro Comp 6" Lift
4.56 Gears
35" Toyo M/T's on 20" Eagle Alloys
K&N Intake
Flowmaster Exhaust
SuperChips Programmer (worthless)
Thanks everyone. I just knew that if anyone had the answer, it would be you guys and this GREAT website. I'm glad to be a part of this site.
Thanks again,
J
it is the mic for OnStar and it is stock. it is not aftermarket even tho GM was too cheap to color match it
-Nick
2009 Silverado 2500 4x4 LT2, Vortec 6.0L V8
Greystone Metallic, Ebony Cloth
LED tailgate lightbar, custom pin striping, Bed Rail Protectors, Wade In-Channel Window Visors
Tint, Rhino Liner, Putco Ion Spark White (3800K) Lows & Fogs
10" Kicker Comp, 350W Kenwood Amp, Husky Liner Floor Liners
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