If you’re dealing with baffling electrical problems in your GM truck or SUV—like power windows with a mind of their own, a dead HVAC panel, or a security light that won’t let your engine start—you’ve likely met the culprit: a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can create a cascade of frustrating issues. This replacement BCM, corresponding to part number 15136877 and others, is the definitive solution for restoring order and full functionality to your vehicle.
We make the repair process simple with our professional Cloning Service. Instead of shipping you a blank module that requires a trip to the dealership for expensive programming, we transfer the critical data from your original BCM directly to this replacement unit. This ensures it’s a true plug-and-play solution, pre-configured for your vehicle’s specific VIN and options. You get back on the road faster, with less hassle and expense.
Case Study: A Tricky Diagnosis
A customer brought in a 2005 Silverado 1500 with a strange combination of symptoms: the radio would cut out, the driver’s side power window worked intermittently, and the airbag light was on with a DTC B1001 (Option Configuration Error). They had already replaced the window switch and checked fuses. In my 20+ years of diagnostics, these seemingly unrelated electrical gremlins almost always point back to one component. We pulled the BCM, and after a bench test, confirmed internal circuit failure. A cloned replacement module like this one solved all three issues in one shot, including providing the correct data to clear the B1001 code after an SDM sync. It’s a classic failure pattern on these GMT800 platforms.
Is Your GM Truck Exhibiting These Electrical Faults?
- ✔ Intermittent or total loss of power windows, door locks, or interior/exterior lighting.
- ✔ HVAC controls are unresponsive, or the blower motor operates erratically.
- ✔ The security system acts up, causing a no-start condition or random alarm activation.
- ✔ An airbag warning light is illuminated on the dash, often with communication DTCs like B1001.
- ✔ Unpredictable electrical behavior, such as wipers turning on by themselves or gauges acting strangely.
- ✔ Communication errors with other modules on the data network.
A Straightforward Guide to BCM Installation
Replacing the BCM is a job most DIYers can handle in minutes. The module is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most trucks and SUVs like the Avalanche or Sierra, it’s mounted to a bracket just above the pedals or to the left of the steering column. In Express and Savana vans, it’s often 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 module from its mounting bracket.
- Install the New Module: Seat the replacement BCM into the bracket and securely reconnect all electrical harnesses. You’ll hear a click as they lock into place.
- Reconnect Power: Reattach the negative battery terminal. Your vehicle’s core functions should now be restored.
Post-Installation Note: While our cloning service handles the primary programming, some vehicles may require a ‘Setup SDM Primary Key in BCM’ procedure with a capable scan tool if the airbag light remains on. Additionally, a Brake Pedal Position Relearn might be necessary. Always consult a factory service manual for vehicle-specific procedures.
Verified Fitment for Your GM Truck, Van, or SUV
This module is a direct replacement for a wide range of General Motors vehicles. Please verify your part number or contact us with your VIN to ensure compatibility. This part fits models including:
- Chevrolet: Avalanche 1500/2500, Silverado 1500/2500/3500, Suburban 1500/2500, Tahoe, Express 1500/2500/3500 Van
- GMC: Sierra 1500/2500/3500 & Denali, Yukon & Yukon XL 1500/2500, Savana 1500/2500/3500 Van
- Cadillac: Escalade, Escalade ESV, Escalade EXT
- Hummer: H2
Interchangeable Part Numbers: 15116066, 10383536, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, 15194170.
Our cloning service is a process where we transfer the vehicle-specific programming, security information, and option content from your original BCM to the replacement unit. This makes the new module a direct plug-and-play part, eliminating the need for dealership programming.
Yes, the cloning process requires your original module to extract the necessary data. We will perform the service and ship both your original module and the newly programmed replacement back to you.
If the airbag light is caused by a BCM communication error (like DTC B1001), this will likely solve the root cause. However, after installation, you may need to perform an ‘SDM Key Sync’ with a professional scan tool to clear the light, as this is a required security handshake between the modules.
No, there is no core charge. Your original module is required for the data cloning service and will be returned to you along with the replacement part.
On the 2003-2006 Chevrolet Avalanche 1500, the Body Control Module (BCM) is located under the steering column, mounted in the driver’s side dashboard area.