Restore Your Truck’s Electrical Systems with a Reliable, Programmed BCM
Are you chasing down electrical gremlins in your GM truck or van? Intermittent power windows, flickering lights, a security system that acts up, or door locks with a mind of their own are classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s comfort and convenience features, a faulty BCM can make your daily drive incredibly frustrating. In my 20+ years of diagnostics, I’ve seen how a bad BCM can mimic a dozen other problems, leading to wasted time and money on incorrect repairs. This isn’t just a component; it’s the brain behind your vehicle’s body electronics.
This is your direct-fit, permanent solution. We offer a dependable 2003–2007 GM BCM that arrives at your door pre-programmed specifically for your vehicle. Simply provide your Vehicle Identification Number (VIN) after purchase, and our technicians will flash the module with the latest, most stable software from General Motors. This critical step ensures seamless communication with your truck’s other modules, eliminating the need for an expensive trip to the dealership for programming. Get your vehicle back to full functionality without the hassle.
Case Study: A Tricky Diagnosis
A customer brought in his ’05 Silverado 2500 with a parasitic battery drain that two other shops couldn’t solve. The battery would be dead every two or three days. They had already replaced the battery and alternator. After connecting my multimeter and pulling fuses, I isolated the drain to a circuit controlled by the BCM. Even with the key off, the BCM wasn’t putting all the accessory circuits to sleep. We swapped in a VIN-programmed BCM, and the drain disappeared completely. It’s a perfect example of how a faulty 2003–2007 GM BCM can cause issues that seem unrelated at first glance.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Power windows or door locks working intermittently or not at all.
- ✔ Interior dome lights or dashboard lights flickering, staying on, or not turning on.
- ✔ The security system light is flashing, or the vehicle won’t start due to a false security alert.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Windshield wipers behaving erratically.
- ✔ Communication error codes stored, such as U0140 (Lost Communication with BCM).
- ✔ False warnings appearing on the driver information center (DIC).
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a DIYer with basic tools. The location varies slightly between trucks and vans, but the process is similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On most Silverado and Sierra pickups, it’s located under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s typically behind the center dash panel.
- Remove Trim Panels: Carefully remove any plastic trim or panels necessary to access the module. These are usually held by clips or a few screws.
- Disconnect and Remove: The BCM has several large electrical connectors. Depress the locking tabs on each connector and pull them straight out. Then, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat the new, programmed BCM into the mounting bracket and securely plug in all electrical connectors. You should hear a click as they lock into place.
- Final Steps: Re-install the trim panels and reconnect the negative battery terminal. Start the vehicle to confirm functionality.
Important Post-Installation Information
While this module is programmed for your VIN, some vehicles require a final handshake between components. Be aware of these potential procedures:
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system. This is only necessary if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure your brake lights and traction control system function correctly.
- No Core Charge: You are not required to return your old BCM. This saves you the cost and hassle of a core return.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual for procedures specific to your exact year and model.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It is compatible with the following models and options:
CHEVROLET EXPRESS/GMC SAVANA VANS 1500/2500/3500 2003-2007 (See specific options in full list)
CHEVROLET SILVERADO/GMC SIERRA PICKUPS 1500/2500/3500 2003-2007 (Classic body style for 2007, excludes Crew Cab for most years, see specific options)
Note: Please refer to the detailed fitment list in the original product data to confirm specific cab, transmission, and package options for your exact vehicle.
Frequently Asked Questions About the 2003–2007 GM BCM
Do I need to do any programming myself?
No. We handle all the programming before we ship the part. You just need to provide your VIN during checkout. This saves you a trip to the dealer and ensures the module works with your vehicle’s specific options.
Is this a plug-and-play part?
For most functions, yes. Once you install the VIN-programmed BCM, your primary body functions should be restored. However, as noted, some vehicles may require a simple relearn procedure for the airbag or brake pedal position sensor if a warning light appears.
What is a core charge? Do I need to send my old part back?
A core charge is a deposit you pay until you return your old part. We do not have a core charge on this BCM. You can keep your original module, saving you time and return shipping costs.
Will this fix my ‘Service 4WD’ light?
While the BCM communicates with many systems, a ‘Service 4WD’ light is more often caused by the Transfer Case Control Module (TCCM) or the encoder motor/sensor. It’s best to have the codes scanned to pinpoint the exact cause before replacing the BCM for that specific issue.
How do I find the BCM in my 2004 Silverado?
In a 2004 Silverado, the BCM is located under the driver’s side dashboard, to the left of the steering column. You will need to remove the lower dash panel to access it.