Restore Your Vehicle’s Electrical System with a Reliable Solution
Are you dealing with baffling electrical problems in your GM truck or van? Flickering lights, malfunctioning power windows and locks, a persistent security light, or even a no-start condition can all point to one culprit: a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can make your daily drive frustrating and unpredictable. I’ve seen it hundreds of times in my shop—a perfectly good engine that won’t start or accessories going haywire, all because this critical component has failed.
This isn’t just an inconvenience; it can be a safety issue when exterior lights or security systems are compromised. Instead of spending a fortune at the dealership for diagnostics and programming, you can get a dependable, pre-programmed GM Body Control Module right here. We take the guesswork out of the repair by flashing the module with the latest GM software updates, specifically matched to your vehicle’s VIN. This ensures seamless integration and proper function right out of the box.
A Technician’s Notebook
A customer brought in his 2005 Silverado 2500 with a classic ‘haunted truck’ complaint. The radio would turn on by itself, the dome light would stay on, and occasionally the truck wouldn’t start, showing a ‘Security’ message. We scanned it and found multiple communication loss codes (U-codes) pointing back to the BCM. The internal circuits, particularly those controlling the vehicle’s security passlock system, were failing intermittently. Instead of a complex rewiring job, the solution was a new, properly programmed BCM. Installing this module resolved all the ghost-like issues, restoring the truck’s reliability and the owner’s peace of mind.
Is Your Truck or Van Showing These Symptoms?
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting (flickering, staying on, or not turning on).
- ✔ The security or anti-theft light is illuminated, preventing the engine from starting.
- ✔ Dashboard warning lights appearing randomly.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Communication error codes, such as U0140 (Lost Communication With Body Control Module).
- ✔ Wipers operating incorrectly or not parking in the correct position.
Your Straightforward BCM Installation Guide
Replacing your GM Body Control Module is a manageable job for a confident DIYer. While the exact location varies slightly between trucks and vans, the process is generally similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On Silverado and Sierra pickups, it’s typically found under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s often located in the center dash area.
- Remove Trim Panels: You may need to remove lower dash panels or covers to gain access. These are usually held by clips or a few screws.
- 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 module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors, ensuring they click securely into place.
- Post-Installation Steps: Reconnect the battery terminal. Start the vehicle to test functions. In some cases, a ‘Setup SDM Primary Key in BCM’ or a ‘Brake Pedal Position Relearn’ may be necessary if you see an airbag light or have brake system warnings. This requires a professional scan tool.
Will This Fit My GM Vehicle?
This module is a direct replacement for part number 15136876 and is compatible with a wide range of 2003-2007 GM trucks and vans. It also replaces several other part numbers, including 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, and 10367689. Please check the detailed fitment list below to confirm compatibility with your specific model and options.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the BCM with the correct software and vehicle-specific options from GM. This ensures the module communicates correctly with your truck’s other systems, making the installation process much smoother.
Is this part truly plug-and-play?
Since we pre-program the module to your VIN, it is designed to be as close to plug-and-play as possible, eliminating the need for dealership programming. However, as with many modern electronic repairs, some vehicles may require a simple relearn procedure (like for the brake pedal position or airbag system) after installation, which may require a capable scan tool.
What if the airbag light is on after I install it?
If the airbag (SRS) light comes on, it means the new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A professional technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a diagnostic tool to resolve this.
Do I have to send my old part back?
No. This purchase requires no core charge. You can keep your original module, which simplifies the process and gets your vehicle back on the road faster.
Will this fix my specific electrical problem?
This GM Body Control Module is the solution for a very wide range of common electrical failures. If your vehicle’s symptoms match the ones listed and a proper diagnosis has pointed to the BCM, this part is the correct fix. Always ensure the problem isn’t a simple fuse or wiring issue first.