2002 GMC Sonoma Remote Control

I have a 3 button, remote control for a 2002 GMC Sonoma with a model 5892 on it, but no FCC code or part number on the back of the remote. I found a helpful website for buying remotes, but they require the FCC Code. Does anyone know the FCC code for this remote? I took the whole remote apart and noticed that someone labeled the circuit board with a KR# in marker, so I'm thinking that someone put the circuit board into a new shell. So, I'm not sure even who manufactures this remote, but I want to buy another remote and need to know the FCC code.:mad: