Are you tired of chasing electrical gremlins in your GM truck or van? Do your power windows have a mind of their own? Are your interior lights flickering, or is your security system causing random no-start conditions? As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times, and the culprit is almost always a failing Body Control Module (BCM).
The BCM is the central command center for your vehicle’s body electronics. When it starts to fail, it can cause a cascade of frustrating and unpredictable problems. This isn’t just an annoyance; it can be a safety concern when lights or locks don’t operate as they should. Forget the expensive trip to the dealership for diagnostics and programming. We offer a reliable, cost-effective solution: a high-quality replacement GM Body Control Module, delivered to your door already programmed for your specific vehicle.
Simply provide us with your vehicle’s VIN after purchase, and our experts will flash this module with the latest, most stable software directly from GM. This ensures seamless integration and restores your vehicle’s functions to factory-perfect condition. It’s the definitive fix for those electrical headaches, getting your reliable truck or van back on the road without the dealership hassle.
Case Study: A Tricky Diagnosis
I remember a 2005 Silverado 2500 that came into my bay with a bizarre combination of problems: the radio would cut out, the dome light wouldn’t turn off, and the ‘Service 4WD’ message kept appearing, even though the 4×4 system was mechanically sound. The owner had already replaced the battery and checked all the fuses. After connecting my scan tool, I noticed several communication error codes (U-codes) pointing to a network issue. Instead of just throwing parts at it, I monitored the data stream from the BCM. It was dropping communication intermittently. This confirmed the internal failure of the BCM. We installed a VIN-programmed module, and every single electrical ghost vanished. It’s a classic example of how a single failing GM Body Control Module can create multiple, seemingly unrelated symptoms.
Is Your GM Truck or Van Showing These Signs?
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights staying on, flickering, or not working at all.
- ✔ The security or anti-theft system activating incorrectly, preventing the engine from starting.
- ✔ False warnings on the instrument cluster (e.g., ‘Service Airbag,’ ‘Service 4WD’).
- ✔ Intermittent operation of the horn, windshield wipers, or radio.
- ✔ Communication error codes stored, such as U0140 (Lost Communication With Body Control Module).
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any work on the electrical system.
- ✔ Locate the BCM: On most Silverado and Sierra 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.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely reconnect all electrical connectors, ensuring they click 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 proper operation.
Important Post-Installation Steps
While our VIN programming handles the primary setup, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following 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.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure your brake lights and traction control function correctly.
Disclaimer: These procedures can vary. We always recommend consulting a factory service manual or a certified technician if you are unsure.
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 fits a wide range of models, including:
CHEVROLET/GMC VANS (EXPRESS, SAVANA) 1500/2500/3500 (2003-2007)
CHEVROLET/GMC TRUCKS (SILVERADO, SIERRA) 1500/2500/3500 (2003-2007 Classic Style)
Note: Please see the detailed fitment list in the original data for specific options and exclusions (e.g., Crew Cab, transmission type).
Frequently Asked Questions
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the GM Body Control Module with the exact software and settings for your vehicle’s specific options, ensuring it works correctly right out of the box.
Is this a simple plug-and-play installation?
Because we pre-program the module, it is a plug-and-play installation for most vehicles. However, as noted, some models may require an additional relearn procedure for the airbag or brake systems if warning lights appear.
Do I need to return my old BCM?
No. We do not require you to send back your original part. There is no core charge associated with this purchase.
Will this fix my ‘Service 4WD’ light?
In many cases, a faulty BCM can cause false warning messages, including for the 4WD system, due to communication errors. If the BCM is the root cause, this replacement module will resolve that issue.
What tools are required for the post-install procedures?
The Airbag System Sync and Brake Pedal Position Relearn procedures require a bi-directional professional diagnostic scan tool, like a Tech 2 or equivalent high-end scanner. Most DIY code readers cannot perform these functions.