Tired of Chasing Electrical Gremlins in Your GM Truck or Van?
Is your Silverado, Sierra, Express, or Savana acting possessed? Flickering dash lights, power windows with a mind of their own, a security light that won’t turn off, or worse—an intermittent no-start condition that leaves you stranded. These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). As the central computer for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and unpredictable problems. Instead of swapping random parts or facing a massive bill at the dealership, get the definitive, reliable solution.
This is a direct-replacement Body Control Module, part number 15747545, for a wide range of 2003-2007 GM vehicles. The best part? We handle the complicated part for you. Simply provide your vehicle’s VIN at checkout, and our technicians will program the module with the latest GM software specific to your truck or van. It arrives at your door ready for installation, saving you a trip to the dealer and the high cost of programming fees. This is the most efficient way to restore your vehicle’s electronics to perfect working order.
Case Study: A Tricky Diagnosis
A customer’s 2006 Silverado 2500 came into the shop last month with a truly baffling set of symptoms. The radio would cut out, the dome light would flicker randomly, and occasionally the truck would refuse to crank, showing only a security light. The owner had already replaced the battery and checked the alternator. After hooking up the scan tool, I saw multiple communication loss codes with various modules. This immediately pointed me away from individual components and towards the network hub—the BCM. Water intrusion from a leaky windshield seal had caused corrosion on the BCM’s pins, a common failure point I’ve seen on dozens of these trucks. We installed one of our pre-programmed modules, and within an hour, every single electrical issue was resolved. The customer was thrilled to have his reliable work truck back without a massive dealership invoice.
Is Your GM Truck or Van Showing These Signs?
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Flickering or erratic interior and exterior lights.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Instrument cluster gauges behaving erratically or not working at all.
- ✔ The radio or infotainment system randomly turns on or off.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors (U-codes).
- ✔ Horn not working or sounding at random.
Your Straightforward BCM Installation Guide
Replacing the BCM is a manageable job for a DIYer with basic tools. Follow these steps carefully for a successful installation. For pickup models, the BCM is typically located under the driver’s side of the dashboard. For van models, it is usually behind the center dash panel.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all modules to power down completely.
- Locate the BCM: Access the module under the steering column (trucks) or in the center dash (vans). You may need to remove a few plastic trim panels for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. 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 plug in all the electrical connectors, ensuring they click into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Post-Installation Procedures (CRITICAL): Turn the key to the ‘ON’ position (do not start). Some critical systems need to be re-synced with the new 2003-2007 GM BCM. While many vehicles will operate immediately, for full functionality, you must perform the ‘Setup SDM Primary Key in BCM’ procedure with a capable diagnostic tool to clear any airbag lights. Additionally, some vehicles may require a brake pedal position sensor recalibration. If you are not equipped to perform these steps, a local repair shop can complete them quickly.
Verified Fitment For These GM Models
This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. Please verify your model and options below to ensure compatibility.
Chevrolet Express / GMC Savana Vans (1500/2500/3500)
- 2003: Body Control (BCM); (center dash)
- 2004-2007: Body Control (BCM); (center dash), w/o commercial tradesman package
Chevrolet Silverado / GMC Sierra Pickups (1500/2500/3500)
- 2003-2005: Body Control (BCM); (under steering column), exc. Crew Cab
- 2006: Body Control (BCM); (under steering column), exc. Crew Cab (Fits various AT/MT configurations)
- 2007: Body Control (BCM); Classic Style (creased door skin), (under steering column), exc. Crew Cab (Fits various AT/MT configurations)
Chevrolet SSR
- 2003-2006: Body Control (BCM)
Frequently Asked Questions
Do I need to do any programming myself?
No. This 2003-2007 GM BCM comes fully programmed to your vehicle’s specific VIN. Just provide us with your VIN during checkout, and it will arrive ready to install, saving you hundreds in dealership programming fees.
What tools are required for installation?
Basic hand tools like a socket set and screwdrivers are typically all that’s needed to access and replace the module. The most important post-installation tool is a capable bi-directional scan tool to perform the airbag (SDM) key setup and brake pedal relearn if required.
Will this fix my truck’s no-start problem?
If your no-start issue is caused by the anti-theft system being triggered by a faulty BCM (a very common issue), then yes, this part is the correct fix. It will restore proper communication and allow your vehicle to start reliably.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled OEM part that has been programmed with the latest software from GM for your vehicle. It offers OEM performance and reliability without the high cost of a new-from-dealer part.
What happens if I don’t do the airbag or brake pedal procedures?
The vehicle will likely run and drive, but you will have a persistent airbag warning light on your dash, meaning the SRS system is inactive. The brake lights may also not function correctly until the brake pedal position sensor is recalibrated. For safety, these procedures are essential.