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GMC SUBURBAN
MODEL YEAR(S
SUBURBAN 1987-1991
KEY T-HARNESS IMMOBILIZER
N/A GM-3 N/A
PART COLOR LOCATION DIAGRAM
12 VOLT CONSTANT RED (+) @ IGNITION SWITCH HARNESS
STARTER YELLOW (+) or PURPLE (+) @ IGNITION SWITCH HARNESS
STARTER 2 N/A
IGNITION 1 PINK (+) @ IGNITION SWITCH HARNESS
IGNITION 2 N/A
IGNITION 3 N/A
ACCESSORY/HEATER BLOWER 1 ORANGE (+) @ IGNITION SWITCH HARNESS
ACCESSORY/HEATER BLOWER 2 N/A
KEYSENSE N/A
PARKING LIGHTS ( - ) N/A
PARKING LIGHTS ( + ) BROWN (+) @ HEADLIGHT SWITCH
POWER LOCK LIGHT BLUE (TYPE A) IN DRIVERS DOOR HARNESS
POWER UNLOCK BLACK/WHITE (TYPE A) IN DRIVERS DOOR HARNESS
LOCK MOTOR WIRE N/A
DOOR TRIGGER WHITE (-) @ UNDERDASH LIGHT
DOMELIGHT SUPERVISION USE DOOR TRIGGER, (Requires Part #775 Relay)
TRUNK RELEASE N/A
SLIDING POWER DOOR N/A
HORN BLACK (-) @ STEERING COLUMN HARNESS
TACH PURPLE/WHITE or WHITE (AC), See NOTE #1 @ DISTRIBUTOR
WAIT TO START LIGHT DARK BLUE (+), See NOTE #2 @ INSTRUMENT CLUSTER
BRAKE WHITE (+) @ SWITCH ABOVE BRAKE PEDAL
FACTORY ALARM DISARM N/A
ANTI-THEFT N/A
NOTES
NOTE #1: the DIESEL tach wire is a WHITE at the Instrument Cluster





NOTE #2: when hooking up a remote starter, if you cannot get the (+) or (-) Wait to Start wire

on the Remote Starter to work properly, you will then need to disconnect this wire and

Program the Remote Starter for the 5, 10, 15 or 20 Second Wait to Start Timer in the

Installation manual.
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