My warning light is on for the outside truck bed light. on 2005 Cadillac Escalade EXT

Changed light but warning light stays on. Do not have correct manual do I'm unable to find out why it's staying on. Do not know if it's a fuse but I can't find any info on what fuse it may be or where that would be located. Any feedback would be appreciated.

Asked by for the 2005 Cadillac Escalade EXT