The radio has a hot all the time wire for memory. It has a hot in run/accessory for normal operation. That what you need? I'll post up the best guess using GM Service Information but I might need the U codes off the SPID label if there are too many wiring schematic choices. I only asked because there are also "remote accessory" plugs on most of these radios too....to run OEM remote CD players, etc. Sure I'm gonna get called John Madden again but I wanted to know for sure before I answered the Q.