Whether your an expert installer or a novice enthusiast with a 2001 Chevrolet Trailblazer (Blazer), 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 2001 Chevrolet Trailblazer (Blazer).

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 2001 Chevrolet Trailblazer (Blazer).

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2001 Chevrolet Trailblazer (Blazer) 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 PCM. The PCM is located on the passenger fender. On the 2.2L the wire is in a black 80 pin plug pin 10, and on the 4.3L the wire is in a red 32 pin plug pin 20.

Door Lock Wire (-): Light Blue
Door Lock Wire Location: Brown plug at BCM. The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Door Unlock Wire (-): White
Door Unlock Wire Location: Brown plug at BCM. The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Door Trigger Wire (-): Use tan for the drivers door located in pin B4 of the purple plug, orange for the passenger door located in pin B2 of the purple plug, and dk. blue/white for the rear doors and rear hatch located in pin B11 of the lt. blue plug, must diode isolate these wires.
Door Trigger Wire Location: At BCM. The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Dome Supervision Wire: Use door trigger.
Dome Supervision Wire Location: N/A

Headlights Wire (-): Purple/White
Headlights Wire Location: Purple plug at BCM. The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Parking Light Positive Wire (+): Brown
Parking Light Positive Wire Location: Light Blue plug at BCM. The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Parking Light Negative Wire (-): White (This wire will not test when using the headlight switch.This wire is triggered by the DRL system. To meter the wire, start the car with the parking brake set, when the brake is releasedThis wire will go to ground.)
Parking Light Negative Wire Location: Light blue plug at BCM. The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Trunk/Hatch Pin Wire (-): Pink/Black
Trunk/Hatch Pin Wire Location: Light blue plug at BCM. The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Hood Pin Wire (-): N/A
Hood Pin Wire Location: N/A

Trunk/Hatch Release Wire (+): Black
Trunk/Hatch Release Wire Location: Purple plug at BCM. The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Factory Alarm Arm Wire: N/A
Factory Alarm Arm Wire Location: N/A

Factory Alarm Disarm Wire (-): Light Green
Factory Alarm Disarm Wire Location: Purple plug at BCM. The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Factory Alarm Disarm but No Unlock Wire (-): N/A
Factory Alarm Disarm Wire Location: N/A

Horn Trigger Wire (-): Black
Horn Trigger Wire Location: Steering Column. Also found in the brown plug at the BCM on vehicles with a factory alarm.

Brake Wire (+): White
Brake Wire Location: Steering Column

Emergency Parking Brake Wire (-): N/A
Emergency Parking Brake Wire Location: N/A

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