Gmc  Sonoma 1998-2003
 PART   COLOR  LOCATION
 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 #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 ( - )  WHITE (-)  @ BCM, LIGHT BLUE plug, See NOTE #2
 PARKING LIGHTS ( + )  BROWN (+)  @ HEADLIGHT SWITCH or @ BCM, LIGHT BLUE plug, See NOTE #2
 POWER LOCK  LIGHT BLUE (TYPE A)  @ BCM, BROWN plug, See NOTE #2
 POWER UNLOCK  WHITE (TYPE A)  @ BCM, BROWN plug, See NOTE #2
 DOOR TRIGGER  See NOTE #3  @ BCM, See NOTE #2
 DOMELIGHT SUPERVISION  TAN (-)  @ BCM, PURPLE Plug, Pin B4, See NOTE #2
 TRUNK RELEASE  N/A  
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  WHITE (AC)  @ PCM, See NOTE #4
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ STEERING COLUMN HARNESS
 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 uses GM's PASSLOCK 2 ANTI-THEFT SYSTEM and requires the 791 Bypass Module to REMOTE START, to order please go to the SECURITY BYPASS MODULES page on this website. NOTE #2: The BCM (Body Control Module) is located to the RIGHT of the the Gas Pedal just below the Radio, the plugs on the BCM face the DRIVERS side of the vehicle. NOTE #3: This vehicle has (2) door trigger wires, the TAN (-) at the PURPLE Plug, Pin B4 is for the DRIVERS DOOR, and the ORANGE (-) at the PURPLE Plug, Pin B2 is for the PASSENGER DOOR. When installign an ALARM system use BOTH Door Trigger wires and DIODE ISOLATE. to connect, See DIAGRAM NOTE #4: The PCM (Powertrain Control Module) is located on the PASSENGER FENDER. On the 2.2L engine the WHITE tach wire is in a BLACK 80-Pin Plug, Pin 10, and on the 4.3L engine the tach wire is in a RED 32-Pin plug, Pin 20. NOTE #5: IMPORTANT !!!!! this wire MUST BE CONNECTED as IGNITION #2 for REMOTE STARTING!!!!!!