Gmc  Sonoma 2004-
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED (+) and RED/WHITE (+)   @ 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  LIGHT GREEN (-)  @ IGNITION SWITCH HARNESS
 PARKING LIGHTS ( - )  WHITE (-)  @ BCM, LIGHT BLUE plug, Pin A5, See NOTE #2
 PARKING LIGHTS ( + )  BROWN (+)  @ BCM, LIGHT BLUE plug, Pin B6, See NOTE #2
 POWER LOCK  LIGHT BLUE (TYPE A)  @ BCM, BROWN plug, Pin A4, See NOTE #2
 POWER UNLOCK  WHITE (TYPE A)  @ BCM, BROWN Plug, Pin A3, See NOTE #2
 DOOR TRIGGER  See NOTE #3  @ BCM, PURPLE Plug, 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 (-)  @ BCM, BROWN plug, Pin A9, See NOTE #2
 TACH  WHITE (AC)  @ PCM, BLUE Plug Pin 49, See NOTE #4
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   LIGHT GREEN (-)  @ BCM, PURPLE plug, Pin B3, See NOTE #2
 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 installing 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!!!!!!