H2 Cd-player Issue

[psychomidgit]

Hi everyone, I just bought a 6-disc cd-player to replace the one (same that came stock in the truck) that's fried. I can do the install, but the GM dealership out here is telling me that they have to program the radio to the truck(I've never heard of anything like that before) instead of just typing in a code that unlocks the player. I'm just wondering if there's another way or option to do it, or if it's even true. They want to charge me $105 just to do it. The player that I bought was pulled out of either a 2004 or 2007 H2 that was totaled, I can't remember which. My truck is an 03, any help would be appreciated. thx