Restore Control and Eliminate Electrical Gremlins in Your GM Truck or Van
Are you chasing down frustrating electrical issues in your Silverado, Sierra, or Express/Savana van? Flickering interior lights, power windows with a mind of their own, a security light that won’t turn off, or even a no-start condition can often be traced back to a single component: a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can wreak havoc. This isn’t just an inconvenience; it can affect vehicle security and safety systems. Stop throwing parts at the problem. This is the direct, reliable solution you’ve been looking for.
We offer a genuine OEM-quality Body Control Module, part number 15747545, that arrives at your door fully programmed to your vehicle’s specific VIN. Forget about expensive trips to the dealership for programming or the need for high-end scan tools. We handle the complex part for you. Simply provide your VIN at checkout, and our technicians will flash the module with the latest GM software updates, ensuring seamless communication and functionality right out of the box. This is the most efficient way to get your truck or van back to 100% operational status.
Case Study: A Tricky Diagnosis
A customer’s 2006 Silverado 2500 came into the shop last month with a classic case of electrical chaos. The radio would randomly shut off, the dome light would stay on, and the key fob worked intermittently. The owner had already replaced the battery and checked all the fuses. After connecting my diagnostic scanner, I saw multiple U-codes (communication errors) pointing to the BCM. A failing 2003-2007 GM BCM can disrupt the entire data network, causing other modules to report errors. We installed one of our pre-programmed modules, performed the quick post-install procedures, and all the phantom issues vanished instantly. It saved the customer hundreds compared to a dealership visit and got his work truck back on the road the same day.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t work at all.
- ✔ A persistent anti-theft or security light on the dashboard.
- ✔ The radio or climate control system behaving unpredictably.
- ✔ Intermittent no-start or no-crank conditions.
- ✔ False warnings on the driver information center (DIC).
- ✔ Key fobs that have stopped working.
Your Straightforward BCM Installation Guide
Replacing the BCM is a manageable job for a DIYer with basic tools. The key is our pre-programming service, which eliminates the most difficult step. While locations vary slightly between trucks and vans, 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.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs, so be gentle. Then, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed 2003-2007 GM BCM in place of the old one. Reconnect all electrical connectors firmly until they click.
- Perform Final Relearns: Reconnect the battery. You will need to perform two important procedures. First, a ‘Setup SDM Primary Key in BCM’ procedure is required to clear the airbag light, which requires a capable scan tool. Second, some vehicles may need a brake pedal position sensor recalibration. If you’re unsure, consulting a professional or your service manual is recommended for these final steps.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part number 15747545 and is also interchangeable with the following part numbers: 15167329, 15194169, 15136224, 15116065, 15198115, 15136876, and 10367689. It is designed for a wide range of GM models:
Silverado 1500/2500/3500 (2003-2007 Classic, exc. Crew Cab)
Express 1500/2500/3500 Van (2003-2007)
SSR (2003-2006)
GMC:
Sierra 1500/2500/3500 (2003-2007 Classic, exc. Crew Cab)
Savana 1500/2500/3500 Van (2003-2007)
Note: Please check the detailed fitment list and your vehicle’s specific options (e.g., transmission type, cab configuration) to ensure perfect compatibility. This module is the solution for your non-Crew Cab truck or your van without the commercial tradesman package.
Frequently Asked Questions
Do I need to do any programming after I receive this BCM?
No! The main programming is done by us before shipping. We flash it with the latest GM software using your VIN. You may need to perform a simple security relearn and the SDM key setup for the airbag system, which is a standard procedure after any BCM replacement.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls and monitors a wide range of electronic accessories not related to the engine, such as power windows, locks, lights, wipers, and the security system.
Will this fix my ‘Service Airbag’ light?
If the light is on due to a communication error with a faulty BCM, yes. After installation, the ‘Setup SDM Primary Key in BCM’ procedure must be performed with a diagnostic tool to sync the new BCM with the airbag system and turn off the light.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it.
Is this a difficult part to replace myself?
For someone with basic mechanical skills, it is very manageable. The most difficult part is typically accessing the module under the dash. Since we handle the programming, the technical barrier is much lower than with a non-programmed part.
What tools are required for the final steps?
While the physical installation requires basic hand tools, the final ‘Setup SDM Primary Key’ and potential brake pedal recalibration require a bi-directional scan tool. Many local repair shops can perform these quick procedures for you if you don’t own one.