GMC Vandura G2500 (1985-1995) wire leads are spliced to trailer wiring, or connected to trailer wire plug Wiring diagrams

2-DR CAB 2-DR CAB AUXILIARY LEAD (TAPED TO BODY, NEAR FUSE BLOCK) DK BACKUP LIGHT SWITCH (ON STEERING COLUMN) BLK WIRE BLU WIRE BRN WIRE CENTER HIGH MOUNT STOP LAMP CHMSL GROUND (NEAR CHMSL) DK BLU WIRE DK GRN WIRE FUSE FUSE BLOCK (LEFT SIDE OF I/P) GRN WIRE HAZARD HAZARD FLASHER HEAD OFF PARK HEADLIGHT SWITCH HOT AT ALL TIMES HOT IN RUN OR START IN-LINE FUSE INSTRUMENT CLUSTER JUNCTION BLOCK (LEFT SIDE OF COWL) LEFT BACKUP LIGHT LEFT FRONT MARKER LIGHT LEFT FRONT PARK/ TURN LIGHTS LEFT REAR MARKER LIGHT RIGHT REAR MARKER LIGHT RH LH LEFT TAIL/ STOP/ TURN LIGHT LEFT TURN IND LEFT TURN, HAZARD LICENSE LIGHTS LT BLU WIRE LT GRN WIRE NORMAL NOTE:BULBS ARE CASE GROUNDED W/ 2-DR CAB ORG/ WIRE PPL RED WIRE RIGHT BACKUP LIGHT RIGHT FRONT MARKER LIGHT RIGHT FRONT PARK/ TURN LIGHTS RIGHT TAIL/ STOP/ TURN LIGHT RIGHT TURN IND RIGHT TURN, HAZARD STOP -HZ STOP LAMP SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TAIL LPS TURN B/U TURN FLASHER TURN/ HAZARD SWITCH W/ DRL W/O DRL W/OPTIONAL HEAVY-DUTY TRAILER TOW PACKAGE W/OPTIONAL TRAILER TOW PACKAGES WARNINGS SYSTEM WHT WIRE WIRE LEADS ARE SPLICED TO TRAILER WIRING, OR CONNECTED TO TRAILER WIRE PLUG YEL WIRE

2-DR CAB AUXILIARY LEAD (TAPED TO BODY, NEAR FUSE BLOCK) DK BACKUP LIGHT SWITCH (ON STEERING COLUMN) BLK WIRE BLU WIRE BRN WIRE CENTER HIGH MOUNT STOP LAMP CHMSL GROUND (NEAR CHMSL) DK BLU WIRE DK GRN WIRE FUSE FUSE BLOCK (LEFT SIDE OF I/P) GRN WIRE HAZARD HAZARD FLASHER HEAD OFF PARK HEADLIGHT SWITCH HOT AT ALL TIMES HOT IN RUN OR START IN-LINE FUSE INSTRUMENT CLUSTER JUNCTION BLOCK (LEFT SIDE OF COWL) LEFT BACKUP LIGHT LEFT FRONT MARKER LIGHT LEFT FRONT PARK LIGHT RIGHT FRONT PARK LIGHT LEFT FRONT PARK/ TURN LIGHT LEFT TAIL/ STOP/ TURN LIGHT LEFT REAR MARKER LIGHT LEFT TURN IND LEFT TURN, HAZARD LICENSE LIGHTS LT BLU WIRE LT GRN WIRE NORMAL NOTE:BULBS ARE CASE GROUNDED W/ 2-DR CAB ORG/ WIRE PPL RED WIRE RIGHT BACKUP LIGHT RIGHT FRONT MARKER LIGHT RIGHT FRONT PARK/ TURN LIGHT RIGHT REAR MARKER LIGHT RH LH RIGHT TAIL/ STOP/ TURN LIGHT RIGHT TURN IND RIGHT TURN, HAZARD STD 2-DR CAB STOP -HZ STOP LAMP SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TAIL LPS TURN B/U TURN FLASHER TURN/ HAZARD SWITCH W/OPTIONAL HEAVY-DUTY TRAILER TOW PACKAGE W/OPTIONAL TRAILER TOW PACKAGES WARNINGS SYSTEM WHT WIRE WIRE LEADS ARE SPLICED TO TRAILER WIRING, OR CONNECTED TO TRAILER WIRE PLUG YEL WIRE