Gmc  Yukon 1998-1999
 PART   COLOR  LOCATION
 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 #5  @ 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  LIGHT BLUE (TYPE C), See NOTE #2  IN EITHER DOOR HARNESS
 POWER UNLOCK  WHITE (TYPE C), See NOTE #2  IN EITHER DOOR HARNESS
 DOOR TRIGGER  PURPLE (-)  @ HEADLIGHT SWITCH
 DOMELIGHT SUPERVISION  WHITE (-), (Requires Part #775 Relay)  @ UNDER DASH LIGHT
 TRUNK RELEASE  BLACK or BLACK/WHITE, See NOTE #4, (Requires Part #775 Relay)  LOW in DRIVERS KICK PANEL
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  WHITE (AC)  @ ECM See NOTE #3
 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.
 EXTRA INFORMATION
 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: If vehicle is a 2-Door, door locks are a (TYPE "C") If vehicle is a 4-Door, door locks are a (TYPE "A") NOTE #3: The ECM (Engine Control Module) is located on the DRIVERS SIDE INNER FENDER, the TACH wire is in a BLACK plug, labled "WHITE" NOTE #4: if vehicle has a LIFT GATE, it is a (+) Positive hatch release, if vehicle has a CARGO DOOR, it is a 5-Wire System, will also require an extra Relay part #775, to connect, NOTE #5: IMPORTANT !!!!! this wire MUST BE CONNECTED as IGNITION #2 for REMOTE STARTING!!!!!! 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.