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Wiring diagrams for 2004 chev silverado

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=22469
Printed Date: July 18, 2025 at 1:38 AM


Topic: Wiring diagrams for 2004 chev silverado

Posted By: mustgkid
Subject: Wiring diagrams for 2004 chev silverado
Date Posted: December 06, 2003 at 10:43 PM

Does anyone have the wiring diagram for a 2004 chevy silverado? If so, Can you please post it.. Thanks



Replies:

Posted By: Alpine Guy
Date Posted: December 06, 2003 at 11:16 PM
i don't have the wire info.  But i do know you need a moduel to do the door locks and factory alarm bypass, its all data now and imposible to test the wires because they are so low in power.   i hate the way chev is going with this.




Posted By: JWorm
Date Posted: December 06, 2003 at 11:46 PM
Wiring for the 2004 is the same as a 2003

CHEVROLET / FULL SIZE PICKUP / 2003 / Remote Start

12volts      red (x2)       +       ignition harness
Starter      yellow       +       ignition harness
Ignition      pink       +       ignition harness
Second Ignition      white       +       ignition harness
Notes: To avoid the check engine light from coming on and possible damage to the automatic transmission, the second ignition in this vehicle MUST be powered when adding a remote start system.      
Accessory      orange       +       ignition harness
Second Accessory      brown       +       ignition harness
Keysense      lt. green       -       ignition harness
Power Lock      use Directed module 456G              
Notes: If Directed module 456G is not available, refer to DirectFax document 1601. On base model trucks the lock wire is lt. blue (-), pin B5, and unlock wire is white (-), pin B10. They are in the lt. blue plug at the BCM.
Power Unlock      see power lock              
Lock Motor      gray              driver door module in door
Unlock Motor      tan              driver door module in door
Parking Lights+      do not use              
Parking Lights-      gray/black       -       brn plug, pin B2 @ BCM
Notes: The BCM (Body Control Module) is under the driver side dash. It has 6 plugs in it, the purple plug is on the back.
Reverse Light      lt. green       +       blk plug, pin F @ BCM
Notes: The BCM (Body Control Module) is under the driver side dash. It has 6 plugs in it, the purple plug is on the back.
Door Trigger      gry/blk (L), blk/wht (R)       -       each door module in door
Notes: On base model trucks the door trigger wires are in the lt. blue plug at the BCM, pins B4 and A5. On 4dr trucks the LR door trigger is lt. blue/black, pin A3, and the RR is lt. GREEN/ black, pin A2. They are in the purple plug at the BCM. Use all wires and diode isolate.
The BCM (Body Control Module) is under the driver side dash. It has 6 plugs in it, the purple plug is on the back.
Dome Supervision      gray/black       +       BCM, black plug, pin E
Notes: The BCM (Body Control Module) is under the driver side dash. It has 6 plugs in it, the purple plug is on the back.
Factory Alarm Arm      arms with lock              
Factory Alarm Disarm      lt. green       -       driver door module in door  
Tachometer      white       ac       instrument cluster or PCM
Notes: The PCM (Powertrain Control Module) is in the left front of the engine compartment to the left of the fan shroud. The tach wire is in the green plug, pin 10.
For tach can also go to any of the ignition coils or injectors and use the wire that is NOT pink, black, or brown.
Wait to start      blue       -       instrument cluster or PCM
Notes: The PCM (Powertrain Control Module) is in the left front of the engine compartment to the left of the fan shroud. The wait to start wire is in the green plug, pin 36.
Brake Wire      white       +       brake pedal switch
Parking Brake      lt. blue       -       lt. blu plug, pin A7 @ BCM
Notes: The BCM (Body Control Module) is under the driver side dash. It has 6 plugs in it, the purple plug is on the back.
Horn Trigger      BLACK / YELLOW to black       -       steering column
Memory Seat 1      red       +       driver door module in door
Memory Seat 2      pink       +       driver door module in door        
Immobilizer Bypass Module:     Required: Yes     Type: Passlock 2     Part #: 555L or 555T
Notes: The Passlock 2 wire colors are yellow, black, and RED / white (not used).
      




Posted By: Alpine Guy
Date Posted: December 07, 2003 at 5:59 PM
how do you get access to those documents?  do you need to pay a subcription fee or can any dealer get them?





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