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GMC FULL SIZE PICKUP
MODEL YEAR(S
FULL SIZE PICKUP 1998
KEY T-HARNESS IMMOBILIZER
N/A N/A GM's PASSLOCK 2 ANTI-THEFT System, See NOTE #1
PART COLOR LOCATION DIAGRAM
12 VOLT CONSTANT RED (+) @ IGNITION SWITCH HARNESS
STARTER YELLOW (+) @ IGNITION SWITCH HARNESS
STARTER 2 N/A
IGNITION 1 PINK (+) @ IGNITION SWITCH HARNESS
IGNITION 2 WHITE (+), See NOTE #6 @ IGNITION SWITCH HARNESS
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 #2 IN EITHER DOOR BOOT
POWER UNLOCK WHITE (TYPE C), See NOTE #2 IN EITHER DOOR BOOT
LOCK MOTOR WIRE GRAY (5-WIRE TYPE) IN DRIVERS DOOR HARNESS
DOOR TRIGGER PURPLE (-) @ 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 (AC), See NOTE #4 @ ECM, See NOTE #3
WAIT TO START LIGHT See NOTE #5
BRAKE WHITE (+) @ SWITCH ABOVE BRAKE PEDAL
FACTORY ALARM DISARM N/A
ANTI-THEFT YELLOW (+), ORANGE/BLACK (-) and RED/WHITE (Not used) GM's PASSLOCK 2 System, these wires exit the Ignition Switch Tumbler together and are in the Main Ignition Switch Harness in the Column.
NOTES
NOTE #1: This vehicle uses GM'S PASSLOCK 2 ANTI-THEFT SYSTEM that requires a 791 Bypass

Module to Remote Start, to order go to the SECURITY BYPASS MODULES Page on this

website.





NOTE #2: if vehicle is a 2-Door it is a TYPE C door lock system, if vehicle is a 4-Door or if it

has a FACTORY KEYLESS ENTRY System it is a TYPE A door lock system.





NOTE #3: the ECM is located on the DRIVERS SIDE inner fender, with 2 plugs, look for the

WHITE wire in the plug labled "WHITE"





NOTE #4: THE DIESEL TACH wire is also a WHITE, but at the Instrument cluster.







NOTE #5: 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.



NOTE #6: IMPORTANT !!!!! this wire MUST BE CONNECTED as IGNITION #2

for REMOTE STARTING!!!!!!
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