Whether your an expert installer or a novice enthusiast with a 2004 Chevrolet Avalanche, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car alarm, remote car starter, car security system or any mobile electronics is identifying the correct wires for a 2004 Chevrolet Avalanche.
The Modified Life staff has put their heads together to create an invaluable resource containing car alarm wiring diagram, remote car starter wiring diagram, car wiring diagram and car security wiring diagram. Feel free to use any car alarm wiring diagram or remote car starter wiring diagram that is listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind and most diagrams listed on our site are submitted by our Modified Life community. Use of the wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2004 Chevrolet Avalanche.
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2004 Chevrolet Avalanche Car Alarm Wiring Diagram Information
Constant 12V+ Wire: Red
Constant 12V+ Wire Location: Ignition Switch Large Harness
Starter Wire (+): Yellow
Starter Wire Location: Ignition Switch Harness
Second Starter Wire (+): N/A
Start Wire Location: N/A
Ignition Wire (+): Pink
Ignition Wire Location: Ignition Switch Harness
Second Ignition Wire: White
Second Ignition Wire Location: Ignition Switch Harness
Accessory Wire: Orange
Accessory Wire Location: Ignition Switch Harness
Second Accessory Wire: N/A
Accessory Wire Location: N/A
Key Sense Wire (+): N/A
Key Sense Location: N/A
Tachometer Wire: White
Tachometer Wire Location: At ECM. ECM is located near the battery, down low, between the fender and the fan under the black plastic cover. On the 4.8L, 5.3L, and 6.0L, the tach wire is located at pin 10 in the “red” connector, and VSS wire is located in pin 50 of the “red” connector.
Door Lock Wire (-): Light Blue
Door Lock Wire Location: Brown plug at BCM. The BCM is located behind the drivers side of the dash. The plugs on the BCM face towards the rear of the vehicle. The parking lights are in pin A5 and the headlights are in pin A11.
Door Unlock Wire (-): White
Door Unlock Wire Location: Brown plug at BCM. The BCM is located behind the drivers side of the dash. The plugs on the BCM face towards the rear of the vehicle. The parking lights are in pin A5 and the headlights are in pin A11.
Door Trigger Wire (-): Use tan for the drivers door located in pin B4 of the purple plug, and for the passenger door it will be a Orange in pin B2 in the Purple plug or Dark Blue/White in pin B11 of the lt.blue plug, must diode isolate these wires.
Door Trigger Wire Location: At BCM. The BCM is located behind the drivers side of the dash. The plugs on the BCM face towards the rear of the vehicle. The parking lights are in pin A5 and the headlights are in pin A11.
Dome Supervision Wire: N/A
Dome Supervision Wire Location: N/A
Headlights Wire (-): White
Headlights Wire Location: Light blue plug at BCM. The BCM is located behind the drivers side of the dash. The plugs on the BCM face towards the rear of the vehicle. The parking lights are in pin A5 and the headlights are in pin A11.
Parking Light Positive Wire (+): Brown
Parking Light Positive Wire Location: Light blue plug at BCM. The BCM is located behind the drivers side of the dash. The plugs on the BCM face towards the rear of the vehicle. The parking lights are in pin A5 and the headlights are in pin A11.
Parking Light Negative Wire (-): White
Parking Light Negative Wire Location: Light blue plug at BCM. The BCM is located behind the drivers side of the dash. The plugs on the BCM face towards the rear of the vehicle. The parking lights are in pin A5 and the headlights are in pin A11.
Trunk/Hatch Pin Wire (-): N/A
Trunk/Hatch Pin Wire Location: N/A
Hood Pin Wire (-): N/A
Hood Pin Wire Location: N/A
Trunk/Hatch Release Wire (+): N/A
Trunk/Hatch Release Wire Location: N/A
Factory Alarm Arm Wire: N/A
Factory Alarm Arm Wire Location: N/A
Factory Alarm Disarm Wire (-): Light Green
Factory Alarm Disarm Wire Location: Driver Kick Panel. Also found in the purple plug of the BCM.
Factory Alarm Disarm but No Unlock Wire (-): N/A
Factory Alarm Disarm Wire Location: N/A
Horn Trigger Wire (-): Black
Horn Trigger Wire Location: Brown plug at BCM. The BCM is located behind the drivers side of the dash. The plugs on the BCM face towards the rear of the vehicle. The parking lights are in pin A5 and the headlights are in pin A11.
Brake Wire (+): White
Brake Wire Location: Brake Pedal Switch
Emergency Parking Brake Wire (-): N/A
Emergency Parking Brake Wire Location: N/A
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