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GMC FULL SIZE PICKUP
MODEL YEAR(S
FULL SIZE PICKUP 1993-1994
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 or FUSE PANEL
POWER LOCK LIGHT BLUE (TYPE C), See NOTE #1 IN EITHER DOOR BOOT
POWER UNLOCK BLACK/RED (TYPE C), See NOTE #1 IN EITHER DOOR BOOT
LOCK MOTOR WIRE GRAY (5-WIRE TYPE) IN DRIVERS DOOR HARNESS
DOOR TRIGGER WHITE (-) @ HEADLIGHT SWITCH
DOMELIGHT SUPERVISION USE DOOR TRIGGER, (Requires Part#775 Relay)
TRUNK RELEASE N/A
SLIDING POWER DOOR N/A
HORN BLACK (-) @ STEERING COLUMN HARNESS
TACH WHITE, See NOTE #3 @ ECM, See NOTE #3
WAIT TO START LIGHT See NOTE #4
BRAKE WHITE (+) @ SWITCH ABOVE BRAKE PEDAL
FACTORY ALARM DISARM N/A
ANTI-THEFT N/A
NOTES
NOTE #1: if vehicle is a 2-Door, it has a TYPE C Door Lock System, if vehicle is a 4-Door,

it has a TYPE A Door Lock System.





NOTE #2: the ECM is located behind the Glove Box.







NOTE #3; THE DIESEL TACH wire is a WHITE (AC) at the Instrument cluster.







NOTE #4: 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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EXTRA INFORMATION