HELP Anyone know where the delay relay to shut inside lights is on 99 Tahoe

[waynieZ]

Hi I have a 99 Chey Tahoe . My interior lights usually go off after I shut the door in 45 seconds. A couple of days ago it never went off and killed my batery. (didn't use truck for 2 days) Does anyone know where the relay or delay box is on this truck? I want to try to disconnect it for the time being until I can get a new one. When you start the truck it goes off like its suposed to. Any help will be appreciated and thank you for your time Wayne