Power Distribution Schematics
WARNING: This page is about a different car, the 2005 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
Fig 3: DDM, INFO, LBEC 1, LBEC 2, LOCKS, PDM, TBC 2A, TBC 2B, and TBC 2C Fuses, and LT DOOR and MIDGATE Circuit Breaker