Get the part# from your dealer then type it in doing a Google search, Amazon or Ebay. Guaranteed to save you money over dealer price.
Thanks man! Yeah, that's usually my plan of attack. Just not too sure if it's going to be a common enough part to get that way. Also, I'm a little concerned that most or all of these police trucks are probably Chevy, not GMC. At least I have some options now thanks to you guys!