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CHEVROLET TAHOE
MODEL YEAR(S
TAHOE 1998-1999
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 #2 @ 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
POWER LOCK LT. BLUE, SEE NOTE #3 IN DRIVERS DOOR BOOT
POWER UNLOCK WHITE, SEE NOTE #3 IN DRIVERS DOOR BOOT
LOCK MOTOR WIRE N/A
DOOR TRIGGER PURPLE (-) @ HEADLIGHT SWITCH
DOMELIGHT SUPERVISION WHITE (-), (Requires #775 Relay) @ UNDERDASH LIGHT
TRUNK RELEASE BLACK or BLACK/WHITE, SEE NOTE #6 LOW IN DRIVERS KICK PANEL
SLIDING POWER DOOR N/A
HORN BLACK (-) @ STEERING COLUMN HARNESS
TACH WHITE (AC) @ ECM, SEE NOTE #4
WAIT TO START LIGHT DK. BLUE (-) @ INSTRUMENT CLUSTER
BRAKE WHITE (+) @ SWITCH ABOVE BRAKE PEDAL
FACTORY ALARM DISARM N/A
ANTI-THEFT GM'S PASSLOCK 2 ANTI-THEFT SYSTEM, SEE NOTE #1
NOTES
NOTE #1: This vehicle is equipped with the PASSLOCK 2 ANTI-THEFT SYSTEM and will require a

791 Bypass Module for Remote Starting,



to order go to the SECURITY BYPASS MODULE Page on this website.







NOTE #2: The IGNITION #2 wire WHITE must be connected to prevent a CHECK ENGINE LIGHT

from turning on and to prevent DAMAGE to the TRANSMISSION on this Vehicle.







NOTE #3: 4-Door vehicles are a TYPE A Door Locks and 2-door vehicles are TYPE C Door Locks.









NOTE #4: The ECM is located on the INNER FENDER. The TACH wire is in a BLACK PLUG marked

WHITE.







NOTE #5: The tach wire is also a WHITE at the instrument cluster, for DIESEL use a WHITE

wire at the ALTERNATOR or INSTRUMENT CLUSTER.







NOTE #6: This wire is a (+)Positive on vehicles with a Rear Lift Window and a 5-Wire type on

vehicles with a Cargo Door.
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