2001 chevrolet blazer

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=91290
Printed Date: October 31, 2025 at 12:03 AM

Topic: 2001 chevrolet blazer

Posted By: connerb
Subject: 2001 chevrolet blazer
Date Posted: March 05, 2007 at 12:05 PM

Does anyone have a 2001 Chevrolet Blazer wiring diagram or know where I can get one?

Replies:

Posted By: master5
Date Posted: March 05, 2007 at 12:13 PM

here goes...

12volts red   +   ignition harness
Starter yellow   +   ignition harness
Second Starter N/A
Ignition pink   +   ignition harness
Second Ignition white   +   ignition harness
Third Ignition N/A
Accessory orange   +   ignition harness

Power Lock lt. blue   +   brown plug at BCM
Power Unlock white   +   brown plug at BCM
Lock Motor gray   5wi driver kick panel
Unlock Motor tan   5wi driver kick panel

Parking Lights+ brown   +   lt. blue plug at BCM
Parking Lights- white   -   lt. blue plug at BCM
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 released this wire will go to ground.

Door Trigger     -   BCM .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.
Dome Supervision use door trigger
Trunk/Hatch Pin pink/black   -   lt. blue plug at BCM
Trunk/Hatch Release black   -   purple plug at BCM

Factory Alarm Disarm lt.green   -   purple plug at BCM
Notes: The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

Tachometer white   ac   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.

Brake Wire white   +   steering column
Parking Brake
Horn Trigger black   -   steering column
Notes: Also found in the brown plug at the BCM on vehicles with a factory alarm.

Immobilizer Bypass Required: Passlock II

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Posted By: kirktcashalini
Date Posted: March 05, 2007 at 2:05 PM

Oh damn, boookmarked (sure I will need this info sometime)... I am assuming this is the same for a 99... or damn close anyway? You the man Master5!

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99 Blazer LT. Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)

Posted By: the12volt
Date Posted: March 05, 2007 at 2:08 PM

...oO(this is the Car Audio Forum, how about the stereo wiring?)

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Posted By: master5
Date Posted: March 05, 2007 at 2:32 PM

Yes it is audio..sorry I missed it..I don't usually get requests for GM audio wiring as either a harness is being use..and the fact that gm has had the same audio wiring for like 50 years..lol

Orange..constant

yellow....acc

black...ground

gray....ill

pink...remote if used

LF+ tan LF- gray

RF+ lt green RF- dk green

LR+ brown LR- yellow

RR+ dk blue RR- lt blue

Hope I helped

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Posted By: rudydapimp
Date Posted: March 05, 2007 at 2:47 PM

Orange - 12v constant
Yellow - 12v switched
Black - Ground
Grey - Illumination
Brown - dimmer
Tan Left +
Grey left -
Lt Green Right +
Dk Green Right -
Brown left rear +
Yellow left rear -
Dk Blue right rear +
Lt Blue right Rear -