Chevrolet  Silverado 2003-2006
 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 #2  @ IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  BROWN (+)  @ IGNITION SWITCH HARNESS
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  GRAY/BLACK (-)  @ BCM, BROWN PLUG, PIN B2, SEE NOTE #3
 PARKING LIGHTS ( + )  BROWN (+)  IN DRIVERS KICK PANEL
 POWER LOCK  SEE NOTE #1, (for BASE MODEL TRUCKS, SEE NOTE #4)  
 POWER UNLOCK  SEE NOTE #1, (for BASE MODEL TRUCKS SEE NOTE #4)  
 DOOR TRIGGER  GRAY/BLACK (-)(DRIVERS) and BLACK/WHITE (-)(PASSENGER), SEE NOTE #5  @ EACH DOOR MODULE, IN EACH DOOR
 DOMELIGHT SUPERVISION  GRAY/BLACK (-)  @ BCM, BLACK PLUG, PIN E, SEE NOTE #3
 TRUNK RELEASE  N/A  
 SLIDING POWER DOOR  N/A  
 HORN  BLACK/YELLOW to BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  Any wire NOT, PINK, BLACK or BROWN (AC)  @ IGNITION COILS or FUEL-INJECTORS
 WAIT TO START LIGHT  DK. BLUE (-)  @ INSTRUMENT CLUSTER, PIN A2
 BRAKE  WHITE (+)  @ BRAKE PEDAL SWITCH
 FACTORY ALARM DISARM   LT. GREEN (-)  @ DRIVERS DOOR MODULE, IN DOOR, BLACK 26-PIN PLUG PIN 15
 ANTI-THEFT  GM'S PASSLOCK 2 ANTI-THEFT SYSTEM, SEE NOTE #1  @ IGNITION SWITCH
 EXTRA INFORMATION
 NOTE #1: This vehicle uses GM'S PASSLOCK 2 ANTI-THEFT SYSTEM that requires a 791 Bypass Module to Remote Start, if you are using a REMOTE STARTER ONLY, use the 791, to order go to the SECURITY BYPASS MODULES Page on this website. IF you are installing a REMOTE STARTER with KEYLESS ENTRY you MUST USE the INTERFACE BYPASS MODULE, Part # DB-ALL or XK09, EITHER Bypass will do the Anti-theft and Keyless entry. If connecting a keyless entry only you can use the GMDL-BP to order go to the INTERFACE BYPASS MODULE Page on this website or call 1-800-659-0764. NOTE #2: The IGNITION #2 wire WHITE must be connected to prevent a CHECK ENGINE LIGHT from turning on and to prevent DAMAGE to the TRANSMISSION on this Vehicle. NOTE #3; The BCM is located under the Drivers Side of the dash, the BCM has 6 plugs on it, with the PURPLE plug on the back. NOTE #4: On BASE model truck the DOOR LOCK INTERFACE MODULE is not necessary, the LOCK wire is a LT BLUE (TYPE B) @ the BCM, LT BLUE PLUG, PIN B5, and the UNLOCK wire is a WHITE (TYPE B) @ the BCM, LT BLUE PLUG, PIN B10. NOTE #5: On BASE Model trucks, the Door Trigger wires are @ the BCM, LT BLUE PLUG, PINS B4 and A5. On 4-Door Trucks the LEFT REAR Door is a LT BLUE/BLACK (-) PIN A3 and the RIGHT REAR Door is a LT GREEN/BLACK (-) PIN A2, located in a PURPLE PLUG at the BCM, use all 4 wires and diode isolate when installing an alarm system.