Parts Reimbursement

So I'm still fairly new to GM. We are the opposite of a wholesale playing dealer. However, our body shop orders their fair share. Lately I'm getting beat down by him and insurance companies on pricing. I have no idea how to apply for reimbursement. I know the owner asks about " his " FUNDS every end of the year in BumpertoBumper. Is there a GM website to walk me through this ? Toyota had a " PartsBridge " program.
I ask here because my DSPM is more like a AWOLDSPM.
Thanks.
I ask here because my DSPM is more like a AWOLDSPM.
Thanks.