GMC Suburban C2500 (1985-1999) org/ Wiring diagrams

BLK WIRE COURTESY LIGHTS CIRCUIT FRONT DOME LAMP GROUND (ON #1 ROOF BOW) FRONT DOME/ READING LAMPS ORG/ WIRE OVERHEAD CONSOLE LAMPS REAR DOME LAMP GROUND (ON #1 ROOF BOW) REAR DOME READING LAMPS WHT WIRE

BLK WIRE CARGO DOOR JAMB SWITCH (EXCEPT CREW CAB) COURTESY LAMPS CTRL CTSY FUSE 3 DOME DEFEAT DOOR JAMB FRONT DOME/ READING LAMPS GRY WIRE HEADLAMP, PANEL DIMMER SWITCH DOME LAMP DEFEAT HORN FUSE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P COMPART- MENT BOX LAMP I/P FUSE BLOCK I/P FUSE BLOCK GAGES FUSE 4 IGN SW INTERIOR LAMP CONTROL MODULE (UNDER CENTER OF DASH) LAMP OUT LEFT FRONT DOOR COURTESY LAMP LEFT FRONT DOOR JAMB SWITCH LEFT I/P COURTESY LAMP LEFT ILLUMINATED VANITY MIRROR LEFT REAR DOOR COURTESY LAMP LEFT REAR DOOR JAMB SWITCH MIRRORS SYSTEM NCA WIRE ORG/ WIRE OVERHEAD CONSOLE LAMPS CIRCUIT PNK PNK WIRE PNK WIRE PPL REAR DOME READING LAMPS REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND CENTER OF DASH) RIGHT FRONT DOOR COURTESY LAMP RIGHT FRONT DOOR JAMB SWITCH RIGHT I/P COURTESY LAMP RIGHT ILLUMINATED VANITY MIRROR RIGHT REAR DOOR COURTESY LAMP RIGHT REAR DOOR JAMB SWITCH UNDERHOOD FUSE-RELAY CENTER UNDERHOOD REEL LAMP W/ OVERHEAD CONSOLE W/ RKE W/O OVERHEAD CONSOLE W/O RKE W/O RKE W/ RKE WHT WIRE

4-DOOR TRUCKS ONLY BLK WIRE CARGO DOOR JAMB SWITCH (SUBURBAN, TAHOE, YUKON) CTRL CTSY FUSE 3 DOME DEFEAT DOOR JAMB FRONT DOME AND READING LAMP GAGES FUSE 4 GRY WIRE HEADLAMP AND PANEL DIMMER SWITCH DOME LAMP DEFEAT COURTESY LAMPS HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P COMPARTMENT BOX LAMP I/P FUSE BLOCK IGN SW INTERIOR LAMP CONTROL MODULE (UNDER CENTER OF DASH) LAMP OUT LEFT FRONT DOOR JAMB SWITCH LEFT I/P COURTESY LAMP LEFT ILLUMINATED VANITY MIRROR LEFT REAR DOOR JAMB SWITCH MIRRORS SYSTEM NCA WIRE ORG/ WIRE PNK WIRE PPL REAR DOME AND READING LAMP REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND CENTER OF DASH) RIGHT FRONT DOOR JAMB SWITCH RIGHT I/P COURTESY LAMP RIGHT ILLUMINATED VANITY MIRROR RIGHT REAR DOOR JAMB SWITCH UNDERHOOD FUSE-RELAY CENTER HORN FUSE UNDERHOOD LAMP PPL UNDERHOOD REEL LAMP W/ RKE W/O RKE WHT WIRE

AUXILIARY LEAD (TAPED NEAR FUSE BLOCK) BLK WIRE BLU WIRE BRN WIRE CENTER HIGH MOUNT STOP LAMP CONVENIENCE CENTER (BEHIND LEFT SIDE OF I/P) CRUISE CONTROL SYSTEM DK BLU WIRE DK GRN WIRE FUSE 1 FUSE 16 FUSE 9 FUSE BLOCK (LOWER LEFT SIDE OF I/P) GRN WIRE HAZARD HAZARD FLASHER HEADLIGHT/ PANEL DIMMER SWITCH HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START IDENTIFICATION LAMPS INSTRUMENT CLUSTER LEFT BACKUP LIGHT LEFT CLEAR- ANCE LAMP LEFT FRONT MARKER LIGHT LEFT FRONT PARK/ TURN LIGHTS LEFT TAIL/ STOP/ TURN LIGHT LEFT TURN IND LEFT TURN, HAZARD LH RH LICENSE LICENSE LIGHTS LIGHT LT BLU WIRE LT DK LT GRN WIRE LT LT M/T A/T NORMAL OFF ORG/ WIRE PARADE MODE SW PARK PARK LPS PLATFORM HITCH GROUND PNK M/T A/T WIRE PNK WIRE PPL RED WIRE RHEO- STAT RIGHT CLEAR- ANCE LAMP RIGHT FRONT MARKER LIGHT RIGHT FRONT PARK/ TURN LIGHTS RIGHT TAIL/ STOP/ TURN LIGHT RIGHT BACKUP LIGHT RIGHT TURN IND RIGHT TURN, HAZARD STOP HAZ STOP LAMP/ TCC SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TURN B/U TURN FLASHER TURN/ HAZARD SWITCH U/H FUSE/ RELAY CENTER (LEFT REAR ENGINE COMPT) W/ STEP BUMPER W/O STEP BUMPER W/OPTIONAL TRAILER TOW PACKAGE WHT WIRE WIRE LEADS ARE SPLICED TO TRAILER WIRING, OR CONNECTED TO TRAILER WIRE PLUG YEL WIRE

BLK WIRE BLU WIRE BRN WIRE BULB CHECK FOG LTS ENABLE CONVENIENCE CENTER DAYTIME RUNNING LAMP INDICATOR INSTRUMENT CLUSTER DAYTIME RUNNING LAMPS MODULE (BEHIND LEFT SIDE OF I/P) DAYTIME RUNNING LAMPS RELAY (ENGINE COMPARTMENT FRONT PLENUM PANEL) DIODE DK BLU WIRE DK GRN/WHT WIRE FOG LAMP ON INDICATOR SOLID STATE SWITCH FOG LAMP RELAY FOG LAMP SWITCH GRN WIRE GRY WIRE HEAD PARK HEADLAMP DIMMER SWITCH HEADLIGHT SWITCH ASSEMBLY HI BEAM INDICATOR HI LO HOT AT ALL TIMES HOT AT ALL TIMES DRL-FOG FUSE 15 HOT IN RUN, BULB TEST OR START FUSE BLOCK GAUGES FUSE 4 ILLUM LAMP LAMP FEED HI BEAM FEED HI BEAM INDICATOR LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LT GRN WIRE LT GRN/BLK WIRE OFF OFF HEAD ORG/ WIRE OUTPUT TO RELAY GROUND PARK PARK BRAKE WARNING SWITCH (AT PARK BRAKE, UNDER LEFT SIDE OF I/P) PICKUP EXT. CAB PNK IGNITION WIRE PNK WIRE PPL PPL LEFT FOG LAMP PPL RIGHT FOG LAMP RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP SUBURBAN PICKUP UTILITY EXT. CAB CREW CAB SUBURBAN UTILITY CREW CAB TAN WIRE TAN/WHT WIRE WHT WIRE YEL WIRE

BLK WIRE BRN WIRE BULB CHECK FOG LTS ENABLE CONVENIENCE CENTER DAYTIME RUNNING LAMP INDICATOR INSTRUMENT CLUSTER DAYTIME RUNNING LAMPS MODULE (BEHIND LEFT SIDE OF I/P) DAYTIME RUNNING LAMPS RELAY (ENGINE COMPARTMENT FRONT PLENUM PANEL) DIODE DK BLU WIRE DK GRN/WHT WIRE FOG LAMP ON INDICATOR SOLID STATE SWITCH FOG LAMP RELAY FOG LAMP SWITCH GRN WIRE GRY WIRE HEAD PARK HEADLAMP DIMMER SWITCH HEADLIGHT SWITCH ASSEMBLY HI BEAM INDICATOR HI LO HOT AT ALL TIMES HOT AT ALL TIMES DRL-FOG FUSE 15 HOT IN RUN, BULB TEST OR START FUSE BLOCK GAUGES FUSE 4 ILLUM LAMP LAMP FEED HI BEAM FEED HI BEAM INDICATOR LEFT HEADLAMP ASSEMBLY HI LO LT GRN WIRE LT GRN/BLK WIRE OFF OFF HEAD ORG/ WIRE OUTPUT TO RELAY GROUND PARK PARK BRAKE WARNING SWITCH (AT PARK BRAKE, UNDER LEFT SIDE OF I/P) PICKUP EXT. CAB PNK IGNITION WIRE PNK WIRE PPL PPL LEFT FOG LAMP PPL RIGHT FOG LAMP RIGHT HEADLAMP ASSEMBLY HI LO SUBURBAN PICKUP UTILITY EXT. CAB CREW CAB SUBURBAN UTILITY CREW CAB TAN WIRE TAN/WHT WIRE WHT WIRE YEL WIRE

BLK WIRE BLU WIRE BULB CHECK DAYTIME RUNNING LAMP INDICATOR DAYTIME RUNNING LAMPS MODULE (BEHIND LEFT SIDE OF I/P) DAYTIME RUNNING LAMPS RELAY (ENGINE COMPARTMENT FRONT PLENUM PANEL) DK BLU WIRE GRN WIRE HEAD PARK HEADLAMP DIMMER SWITCH HEADLIGHT SWITCH ASSEMBLY HI BEAM INDICATOR HOT AT ALL TIMES HOT AT ALL TIMES DRL-FOG FUSE 15 HOT IN RUN, BULB TEST OR START FUSE BLOCK GAUGES FUSE 4 INSTRUMENT CLUSTER LAMP FEED HI BEAM FEED HI BEAM INDICATOR LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LT GRN WIRE LT GRN/BLK WIRE OFF OFF HEAD ORG/ WIRE OUTPUT TO RELAY GROUND PARK PARK BRAKE WARNING SWITCH (AT PARK BRAKE, UNDER LEFT SIDE OF I/P) PNK IGNITION 10 10 WIRE PNK WIRE RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP TAN WIRE TAN/WHT WIRE WHT WIRE YEL WIRE

BLK WIRE BRN WIRE DK BLU WIRE FOG LAMP ON INDICATOR SOLID STATE SWITCH FOG LAMP RELAY (BEHIND LEFT SIDE OF I/P) FOG LAMP SWITCH GRN WIRE GRY WIRE HEADLAMP DIMMER SWITCH HEADLIGHT SWITCH ASSEMBLY HI BEAM INDICATOR HI LO HOT AT ALL TIMES HOT AT ALL TIMES FUSE BLOCK DRL-FOG FUSE ILLUM LAMP INSTRUMENT CLUSTER LEFT LOW BEAM HEAD- LAMP LT GRN WIRE OFF OFF HEAD HEAD PARK ORG/ WIRE PARK PPL PPL PPL RIGHT FOG LAMP LEFT FOG LAMP RIGHT HIGH BEAM HEAD- LAMP LEFT HIGH BEAM HEAD- LAMP RIGHT LOW BEAM HEAD- LAMP TAN WIRE WHT WIRE YEL WIRE

BLK WIRE BULB CHECK DAYTIME RUNNING LAMP INDICATOR DAYTIME RUNNING LAMPS MODULE (BEHIND LEFT SIDE OF I/P) DAYTIME RUNNING LAMPS RELAY (ENGINE COMPARTMENT FRONT PLENUM PANEL) DK BLU WIRE GRN WIRE HEAD PARK HEADLAMP DIMMER SWITCH HEADLIGHT SWITCH ASSEMBLY HI BEAM INDICATOR HOT AT ALL TIMES HOT AT ALL TIMES DRL-FOG FUSE HOT IN RUN, BULB TEST OR START FUSE BLOCK GAUGES FUSE 4 INSTRUMENT CLUSTER LAMP FEED HI BEAM FEED HI BEAM INDICATOR LEFT HEADLAMP ASSEMBLY HI LT GRN WIRE LT GRN/BLK WIRE OFF OFF HEAD ORG/ WIRE OUTPUT TO RELAY GROUND PARK PARK BRAKE WARNING SWITCH (AT PARK BRAKE, UNDER LEFT SIDE OF I/P) PNK IGNITION 10 10 WIRE PNK WIRE RIGHT HEADLAMP ASSEMBLY HI LO TAN WIRE TAN/WHT WIRE WHT WIRE YEL WIRE

BLK WIRE BRN WIRE DK BLU WIRE FOG LAMP ON INDICATOR SOLID STATE SWITCH FOG LAMP RELAY (BEHIND LEFT SIDE OF I/P) FOG LAMP SWITCH GRN WIRE GRY WIRE HEADLAMP DIMMER SWITCH HEADLIGHT SWITCH ASSEMBLY HI BEAM INDICATOR HI LO HOT AT ALL TIMES HOT AT ALL TIMES FUSE BLOCK DRL-FOG FUSE ILLUM LAMP INSTRUMENT CLUSTER LEFT HEADLAMP ASSEMBLY LO HI LT GRN WIRE OFF OFF HEAD HEAD PARK ORG/ WIRE PARK PPL PPL PPL RIGHT FOG LAMP LEFT FOG LAMP RIGHT HEADLAMP ASSEMBLY TAN WIRE WHT WIRE YEL WIRE