2003 Chevrolet Express Underhood Fuse Diagram 2003 Chevrolet Express Underhood Fuse Map Fuse Panel Layout Diagram Parts: pcm IGNITION, lOW BEAM, HIGH BEAM, tbc acc, defogger, DRL relay, fuel pump, flasher, horn, engine, Ignition coil, TBC ignition, spare, crank, auxiliary power, radio battery, PCM battery, stop lamp, TRLR BU, cigar lighter, A/C clutch, CAN VENT, …