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GMC FULL SIZE PICKUP (OLD BODY STYLE)
MODEL YEAR(S
FULL SIZE PICKUP (OLD BODY STYLE) 1999-2000
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 (+) or PURPLE (+) @ IGNITION SWITCH HARNESS
STARTER 2 N/A
IGNITION 1 PINK (+) @ IGNITION SWITCH HARNESS
IGNITION 2 WHITE (+), See NOTE #7 @ 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 See NOTE #3 @ BCM, BEHIND the DRIVERS SIDE of DASH 14301_FULL-SIZE-PICKUP-(OLD-BODY-STYLE)_(-) NEGATIVE DOOR PIN ISOLATION CIRCUIT.pdf
DOMELIGHT SUPERVISION TAN (-) @ BCM, BEHIND dirvers SIDE OF dash
TRUNK RELEASE N/A
SLIDING POWER DOOR N/A
HORN BLACK (-) @ STEERING COLUMN HARNESS
TACH WHITE (AC) , See NOTE #5 @ ECM, See NOTE #4
WAIT TO START LIGHT DARK BLUE (-), See NOTE #6 @ INSTRUMENT CLUSTER
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: At the BCM the DRIVER DOOR is a TAN (-) Pin B4 of the PURPLE PLUG, the

PASSENGER DOOR is a ORANGE (-) Pin B2. When connecting to an alarm system

use both wires and DIODE ISOLATE. See DIAGRAM



NOTE #4; the ECM is located on the DRIVERS SIDE inner fender, with 2 plugs, look for the

WHITE wire in the plug labled "WHITE"





NOTE #5: THE DIESEL TACH wire is also a WHITE but at the Instrument cluster.





NOTE #6; 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 Timmer

in the Installation manual.





NOTE #7; IMPORTANT !!!!! this wire MUST BE CONNECTED as IGNITION #2 for

REMOTE STARTING!!!!!!
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EXTRA INFORMATION