2004 GMC Sierra 1500 Pickup Owner's Manual - Page 529

Device SEO TRAILER UPFIT SL RIDE HDLR 2 BODY DEFOG HDLNR 1 SPARE RELAY CB SEAT CB RT DOOR SPARE INFO Usage Special Equipment Option Trailer Brake Wiring Upfitter (Not Used) Ride Control Harness Connection Headliner Wiring Connector Body Wiring Connector Rear Defogger Relay Headliner Wiring Connector 1 Not Used Driver and Passenger Seat Module Circuit Breaker Right Power Windows Circuit Breaker Not Used Infotainment Harness Connection Underhood Fuse Block The underhood fuse block in the engine compartment on the driver's side of the vehicle near the battery. Lift the cover for access to the fuse/relay block. To remove fuses hold the end of the fuse between your thumb and index finger and pull straight out. See Engine Compartment Overview on page 5-12 for more information on its location. 5-129