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Vehicle Wiring Details for your
2003-2006 Gmc Sierra 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 2003-2006 Gmc Sierra . 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 HARNESS
 STARTER  YELLOW (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  WHITE (+), See NOTE #6  @ 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 ( - )  GRAY/BLACK (-)  @ BCM, BROWN Plug, Pin B2, See NOTE #2
 PARKING LIGHTS ( + )  BROWN (+)  IN DRIVERS KICK PANEL
 POWER LOCK  See NOTE #1  
 POWER UNLOCK  See NOTE #1  
 DOOR TRIGGER  GRAY/BLACK (-) DRIVERS and BLACK/WHITE (-) PASSENGER, Use both, See NOTE #3  @ EACH DOOR MODULE in EACH DOOR
 DOMELIGHT SUPERVISION  GRAY/BLACK (-)  @ BCM, BLACK Plug PIN F, See NOTE #2
 TRUNK RELEASE  N/A  
 SLIDING POWER DOOR  N/A  
 HORN  BLACK/YELLOW to BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  WHITE (AC)  @ PCM, GREEN PLUG PIN 36, See NOTE #4
 WAIT TO START LIGHT  DARK BLUE (-), See NOTE #5  @ PCM, See NOTE #4
 BRAKE  WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   LIGHT GREEN (-)  IN DRIVERS DOOR MODULE in DRIVERS DOOR
 ANTI-THEFT  YELLOW (+), 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 REQUIRES A SPECIAL INTERFACE BYPASS MODULE TO REMOTE START and do KEYLESS ENTRY, PART # DB-ALL or XK09, TO ORDER PLEASE GO TO THE INTERFACE BYPASS MODULE PAGE ON THIS WEBSITE. IF YOU ARE NOT DOING KEYLESS ENTRY YOU CAN USE THE 791 BYPASS MODULE. NOTE #2: The BCM (Body Control Module) is located UNDER the drivers side of dash. The unit has (6) plugs on it with the PUPRLE Plug on the back of the unit. NOTE #3: on the BASE model trucks the wires are in the LIGHT BLUE PLUG at the BCM, PINS B4 and B5. On the 4 door trucks the DRIVERS REAR door is a LIGHT BLUE/BLACK (-) PIN A3 and the PASSENGERS REAR DOOR is a LIGHT GREEN/BLACK (-) PIN A2 these wires are in the the PURPLE PLUG at the BCM. NOTE #4: The PCM (Powertrain Control Module) is located in the LEFT FRONT of the engine compartment to the left of the fan shroud. On DIESELS the TACH wire is at the BLACK PLUG, PIN 55 and on the hybrid models the tach wire is in a GREEN PLUG PIN 35 NOTE #5: 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. NOTE #6: IMPORTANT !!!!! this wire MUST BE CONNECTED as IGNITION #2 for REMOTE STARTING!!!!!!
 
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