Is Your GM Truck or Van Acting Possessed?
Are you dealing with a frustrating mystery of flickering dash lights, power windows with a mind of their own, or a security light that won’t turn off? Before you start questioning your sanity, the culprit is likely a failing Body Control Module (BCM). In my 20+ years as a technician, I’ve seen these exact symptoms hundreds of times on Silverado, Sierra, Express, and Savana models. The BCM is the central hub for your vehicle’s body electronics, and when it fails, it creates a cascade of confusing and annoying problems.
Real-World Diagnosis: “A customer’s 2005 Silverado 2500 came into the shop last week with the radio and dash lights cutting out intermittently, and the driver’s power lock was dead. He had already replaced the battery and checked fuses. We hooked up the scan tool and saw multiple communication loss codes with the BCM. After confirming power and ground to the module were good, we pinpointed the internal failure of the BCM itself—a common issue I’ve seen countless times due to heat cycles and vibration causing microscopic cracks in the circuit board’s solder joints.”
The Direct Solution: A VIN-Programmed BCM
Forget expensive dealership appointments and the hassle of towing your vehicle for programming. This is a direct-fit GM BCM Replacement, meticulously tested and programmed specifically for your vehicle using your VIN. We load the latest GM software updates, ensuring your vehicle operates with the most stable and reliable calibration available. This isn’t just a part; it’s a complete, ready-to-install solution.
Common Symptoms of a Failing BCM:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting (flickering, staying on, or not working at all).
- ✔ The security or anti-theft light stays illuminated, possibly causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ False warnings on the instrument cluster (e.g., “Door Ajar”).
- ✔ Communication errors with other modules on a professional scan tool.
Simple Installation Process
This module is designed for a straightforward swap. While the location varies between trucks (under the steering column) and vans (center of the dash), the process is simple for a DIYer with basic tools.
- Safety First: Disconnect the negative battery terminal and wait a few minutes for the system to discharge.
- Locate the BCM: Find the original module. It will have several large multi-pin connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt or unclip the old module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM and securely plug in all the electrical connectors until they click.
- Reconnect Power: Re-attach the negative battery terminal.
Important Post-Installation Procedures
After installing your new GM BCM Replacement, a couple of quick procedures may be required to ensure full system functionality. This is normal and ensures all related vehicle systems communicate correctly with the new module.
- Airbag System Reset: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible high-level scan tool. This re-establishes the security handshake between the new BCM and the airbag module (SDM).
- Brake Pedal Position Sensor Relearn: On some vehicles, the Brake Pedal Position (BPP) sensor may need to be recalibrated. This is a simple procedure, often done with a scan tool, that ensures the brake lights and stability control system receive accurate input.
These steps are crucial for safety and are standard practice after a BCM is replaced. If you are unsure, consult your vehicle’s service information or a qualified technician.
This is a direct replacement for the following part numbers:
15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689
By providing your VIN upon purchase, you guarantee you receive a fully compatible GM BCM Replacement that restores your vehicle’s functions correctly the first time. End the electrical headaches and get your truck or van back to being the reliable workhorse it was meant to be.