It's part of the switch on the edge of the glove box opening
Look at gmpartsdirect.com
Crap. Are there instructions anywhere how to remove the box and install this? I would hate to have to go to a mechanic just to install a light.Below is the lamp assembly. The glove box may have to be removed to install. You will have to check if the wire harness is there.
1997-2017 GM Instrument Panel Compartment Lamp 12450028 GM | GMPartsDirect.com
1997-2017 GM part # 12450028 - Instrument Panel Compartment Lampwww.gmpartsdirect.com
Try GoogleCrap. Are there instructions anywhere how to remove the box and install this? I would hate to have to go to a mechanic just to install a light.