My 1999 Tahoe did not start this morning. tested the battery and its fine. I placed it in neutral and it started. Then I shut it off and started it in park and it started. I may have an issue with the PNP switch but want to check the BU/LP fuse first but cannot locate that fuse. Nothing in the fuse box under the hood is labled BU/LP. Can someone tell me where to find this fuse?