2003 Silverado remote start wiring
Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=46283
Printed Date: May 09, 2025 at 11:49 AM
Topic: 2003 Silverado remote start wiring
Posted By: ga1990
Subject: 2003 Silverado remote start wiring
Date Posted: December 29, 2004 at 10:24 AM
I'm wanting to install a remote start on my 2003 silverado 1500, does anyone have the wiring diagram? Thanks.
Replies:
Posted By: KarTuneMan
Date Posted: December 29, 2004 at 6:50 PM
12volts | red (x2) | + | ignition harness | Starter | yellow | + | ignition harness | Second Starter | N/A | | | 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. | Third Ignition | N/A | | | 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 456G is not necessary. Instead, the lock wire is lt. blue (-), pin B5, and the unlock wire is white (-), pin B10. They are in the lt. blue plug at the BCM. | Power Unlock | see power lock | | | Lock Motor | gray | 5wi | driver door module in door | Unlock Motor | tan | 5wi | driver door module in door | Parking Lights+ | brown | + | driver kick panel | Parking Lights- | gray/black | - | BCM, brown plug, pin B2 | 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. | Hazards | white | - | steering column, 5 pin plug | Turn Signal(L) | dk. green | + | steering column, 5 pin plug | Turn Signal(R) | lt. green | + | steering column, 5 pin plug | Reverse Light | lt. green | + | BCM, black plug, pin F | 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 | gray/blk (L), BLACK/ wht (R) | - | each door module in each 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. | Trunk/Hatch Pin | N/A | | | Hood Pin | N/A | | | Trunk/Hatch Release | N/A | | | Power Sliding Door | N/A | | | Factory Alarm Arm | arms with lock | | | Factory Alarm Disarm | lt. green | - | driver door module in door | Disarm No Unlock | see factory alarm disarm | | | Tachometer | white | ac | instrument cluster, pin A5 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 | dk. blue | - | instrument cluster, pin A2 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 | - | BCM, lt. blue plug, pin A7 | 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 | Memory Seat 3 | N/A | + | |
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). |
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