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Vehicle Wiring Details for your
2008-2009 Chevrolet Trailblazer Wiring Diagram
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Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 2008-2009 Chevrolet Trailblazer . This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. Please be sure to test all of your wires with a digital multimeter before making any connections. More information on using a multimeter and testing wires please see our Technical Support Area.


 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED (+)   @ IGNITION SWITCH, BLACK 7-PIN PLUG, PIN F
 STARTER  YELLOW (+)  @ IGNITION SWITCH, BLACK 7-PIN PLUG, PIN D
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ IGNITION SWITCH, BLACK 7-PIN PLUG, PIN C
 IGNITION 2  WHITE (+)  @ IGNITION SWITCH, BLACK 7-PIN PLUG, PIN E
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+)  @ IGNITION SWITCH, BLACK 7-PIN PLUG, PIN G
 ACCESSORY/HEATER BLOWER 2  BROWN (+)  @ IGNITION SWITCH, BLACK 7-PIN PLUG, PIN A
 KEYSENSE  LT. GREEN (-) (REQUIRED)  @ IGNITION KEY CYLINDER
 PARKING LIGHTS ( - )  GRAY/BLACK (-)  @ HEADLIGHT SWITCH or BCM, TAN PLUG, PIN E5, SEE NOTE #2
 PARKING LIGHTS ( + )  BROWN (+)(FRONT) and BROWN(+)(REAR) USE BOTH!!  @ FUSEBOX, BLACK 68-PIN PLUG, PIN C3(FRONT) and 68-PIN PLUG, PIN E2(REAR)
 POWER LOCK  SEE NOTE #1  
 POWER UNLOCK  SEE NOTE #1  
 DOOR TRIGGER  GRAY/BLACK (-)  @ DDM, GRAY 24-PIN PLUG, PIN A2, SEE NOTE #3
 DOMELIGHT SUPERVISION  GRAY/BLACK (+)  @ FUSEBOX, GRAY 32-PIN PLUG, PIN B6, SEE NOTE #4
 TRUNK RELEASE  N/A  
 SLIDING POWER DOOR  N/A  
 HORN  BLACK/YELLOW to BLACK (-)  @ HORN SWITCH or BCM, TAN PLUG, PIN E12, SEE NOTE #2
 TACH  WHITE (AC)  @ INSTRUMENT CLUSTER, GRAY 24-PIN PLUG, PIN A12, SEE NOTE #5
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ BRAKE PEDAL SWITCH
 FACTORY ALARM DISARM   LT. GREEN (-)  @ DDM, GRAY 24-PIN PLUG, PIN A4, SEE NOTE #3 and NOTE #6
 ANTI-THEFT  GM'S PASSLOCK 2 ANTI-THEFT SYSTEM, See NOTE #1  @ IGNITION SWITCH
 EXTRA INFORMATION
 NOTE #1: This vehicle is Equipped with GM'S PASSLOCK 2 Anti-theft System that requires the 791 Bypass Module for REMOTE STARTING ONLY, if you have a REMOTE STARTER with KEYLESS ENTRY this vehicle will require part # DB-ALL or XK09, to order please go to the INTERFACE BYPASS MODULE Page on this website. NOTE #2: The BCM is located Under the LEFT REAR Seat and Attached to the underseat fuse box. NOTE #3: The DDM, is located in the Drivers Door, attached to the Drivers Door Switch Panel. NOTE #4: The FUSEBOX, is located under the Left Rear Seat. NOTE #5: This wire is also found at the ECM, BLUE PLUG, PIN 25, the ECM is located on the Drivers Side of the Engine on the I-6 Models and near the lower front drivers side of the engine on the V8 Models. NOTE #6: TEST this wire while turning the key in the drivers door key cylinder.
 
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