FUSEUSAGEIGN1Ignition 1IGN 4Ignition 4IGN 3Ignition 3BATT/HAZBAttery/Hazard Warning FlashersHEADLAMPHeadlampsLIGHTINGInterior/Exterior LampsHVACComfort Control SystemNOTEC4/C5 Electric Brake, C6/C7/C8 Brake Lamps GMC C-Series MK3 2003 Underhood Fuse Panel / Board – Fuse Symbol Map