Restore Your Truck’s Electrical System with a Plug-and-Play Solution
Are you dealing with baffling electrical issues in your GM truck or van? Flickering dash lights, power windows and locks with a mind of their own, or a persistent ‘Service Security System’ message? These are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause chaos. This replacement 2003-2007 Sierra 1500 BCM is the reliable, straightforward solution you need to get your vehicle back to 100% functionality.
We take the guesswork and hassle out of the repair. Unlike a generic part from the auto parts store, this module arrives at your door pre-programmed to your vehicle’s specific VIN. We load the latest GM software updates, ensuring optimal performance and compatibility right out of the box. This eliminates the need for an expensive trip to the dealership for programming, saving you both time and money.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2006 Silverado 2500 that came into my bay with a laundry list of complaints. The owner said his interior lights would stay on, the radio presets would randomly wipe, and sometimes the power door locks wouldn’t respond. He’d already replaced the battery and checked all the fuses. A scan showed a slew of communication codes, primarily U0140 – Lost Communication with Body Control Module. After confirming power and ground at the BCM connector were good, it was clear the module itself was failing internally. We installed a VIN-programmed BCM just like this one, and it was like an exorcism—every single electrical gremlin vanished. It’s a common failure, but thankfully, it’s a very straightforward fix with the right part.
Common Signs of a Failing BCM
If your vehicle is exhibiting these symptoms, a failing BCM is the likely culprit. This module is designed to correct these common issues:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior dome lights or dashboard lights staying on or not working at all.
- ✔ The security system light is illuminated or flashing, potentially causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U0140, U0155, or U0164.
- ✔ Wipers operating intermittently or at the wrong speed.
A Straightforward Guide to Installation
For most DIYers and professional technicians, this is a simple swap. The key is our pre-programming service, which handles the most complex part of the job before it even ships.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most Sierra and Silverado pickups, the BCM is located under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s typically found behind the center dash panel.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Then, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM in the mounting bracket and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, etc.—to confirm the repair was successful.
Important Post-Installation Note: In some cases, additional vehicle-specific relearn procedures may be needed. For instance, if the airbag light is on, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. A ‘Brake Pedal Position Relearn’ may also be necessary. Always consult a factory service manual for your specific model if you are unsure.
Verified Vehicle Compatibility
This BCM is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit the following models (excluding certain options like Crew Cab as noted):
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- GMC Sierra 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Express 1500/2500/3500 Van (2003-2007)
- GMC Savana 1500/2500/3500 Van (2003-2007)
- Chevrolet SSR (2003-2006)
Please verify your specific model and options against the detailed fitment list in the vehicle compatibility chart to ensure a perfect match. A correct fit is essential for our VIN programming to work correctly.
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we receive your VIN, as the programming is specific to your vehicle.
Is this a plug-and-play part?
Yes, for most vehicles. Because we program it to your VIN, it eliminates the need for dealer programming. However, in some cases, minor relearn procedures like for the airbag system or brake pedal sensor may be required after installation.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module, which can be helpful for double-checking part numbers if needed.
My airbag light came on after installing. What should I do?
This is a known possibility. The new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which must be done with a professional-grade diagnostic scan tool.
Will this fix my ‘Service Security System’ light?
In most cases, yes. The BCM is a critical part of the vehicle’s anti-theft and security system. A faulty BCM is a very common cause for this warning message and related starting issues.
What if my original part number isn’t 15198115?
This module is a direct replacement for several part numbers. Please check the list provided, which includes 15167329, 15194169, 15747545, and others. As long as your part number is on our list, this module will work perfectly.