Are you chasing down frustrating electrical gremlins in your GM truck? Random warning lights, a dead A/C blower, or power windows with a mind of their own are classic signs of a failing Body Control Module (BCM). As a technician with over 20 years of experience, I’ve seen how a bad BCM can make a perfectly good truck feel unreliable. This isn’t just a part; it’s the central nervous system for your vehicle’s comfort and convenience features.
This replacement module, compatible with part number 15136877, is the definitive solution. We don’t just sell you a part; we provide a complete Cloning Service. We transfer the exact data from your original BCM to this replacement unit. This means all your vehicle’s specific settings, security information, and options are perfectly preserved. The result is a true plug-and-play fix that eliminates the need for a costly trip to the dealership for programming. Restore full functionality and peace of mind to your truck with a reliable, ready-to-install solution.
Case Study: The Silverado That Wouldn’t Cooperate
A customer brought in a 2005 Silverado 2500HD with a list of bizarre symptoms: the radio would turn on and off, the dome light flickered, and the security light was on, causing an intermittent no-start. He had already replaced the battery and checked the grounds. After connecting my scanner, I saw a handful of communication codes, including the notorious B1001. We pinpointed the BCM. Instead of a new, unprogrammed unit that would require hours of dealer-level setup, we used a cloned module. The entire swap took less than 10 minutes. Every single issue was resolved instantly, saving the customer hundreds in diagnostic and programming fees.
Is Your Avalanche Showing These Electrical Gremlins?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need for your 2002-2006 Avalanche 2500 BCM problems.
- ✔ The HVAC blower motor works intermittently or not at all.
- ✔ Power windows, door locks, or interior lights operate erratically or have failed completely.
- ✔ The airbag warning light is illuminated, often with a DTC like B1001 (Option Configuration Error).
- ✔ Your vehicle’s security system is malfunctioning, leading to a no-start condition.
- ✔ Unexplained battery drain when the vehicle is off.
- ✔ A cluster of communication or body-related Diagnostic Trouble Codes (DTCs).
Simple Swap: Your 5-Minute Installation Guide
Getting your truck back in order is easier than you think. No complex tools are required for the physical installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning work.
- Locate the BCM: On most compatible trucks and SUVs, the BCM is located under the driver’s side dashboard, near the steering column. It’s a black plastic box with several large electrical connectors.
- Remove and Replace: Carefully unplug the wiring harnesses from your old BCM. They have release tabs that must be pressed. Unbolt or unclip the old module and swap in your new, cloned unit.
- Reconnect: Securely plug the wiring harnesses into the new BCM. You will hear a click as they lock into place.
- Power Up: Reconnect the battery terminal. Start the vehicle and test all functions—lights, locks, windows, HVAC, etc.
- Post-Install Checks: In some cases, an ‘Airbag System Sync’ or ‘Brake Pedal Position Relearn’ may be needed if related warning lights appear. This requires a professional scan tool. See our FAQ for details.
Verified Vehicle Compatibility
This BCM with cloning service is a direct-fit solution for a wide range of General Motors trucks and SUVs. It is interchangeable with multiple part numbers, including 15116066, 15136225, 15136877, 15198116, and others. Please verify your model and year below.
AVALANCHE 2500 02-06
ESCALADE & ESV & EXT 03-06
HUMMER H2 03-07
EXPRESS VAN 1500/2500/3500 04-07 (w/ opt PRP)
SAVANA VAN 1500/2500/3500 04-07 (w/ opt PRP)
SIERRA 1500 PICKUP 03-07 (Classic)
SIERRA 2500 PICKUP 03-07 (Classic)
SIERRA 3500 PICKUP 03-07 (Classic)
SIERRA DENALI 03-07 (Classic)
SILVERADO 1500 PICKUP 03-07 (Classic)
SILVERADO 2500 PICKUP 03-07 (Classic)
SILVERADO 3500 PICKUP 03-07 (Classic)
SUBURBAN 1500/2500 03-06
TAHOE 03-06
YUKON & YUKON XL 1500/2500 03-06
Frequently Asked Questions
How does the Cloning Service work?
After you place your order, you will send us your original BCM. We use specialized equipment to perform a full data transfer to the replacement unit. This copies all vehicle-specific information, including VIN, mileage, and key data, ensuring 100% seamless functionality. We then ship both your original module and the ready-to-install replacement back to you.
Do I need to get this programmed by a dealer?
No. The entire point of our cloning service is to eliminate the need for any additional programming. Once you receive the cloned module, it’s ready for immediate installation and operation.
What is the ‘Airbag System Sync’ mentioned in the installation steps?
The BCM communicates with the airbag system (SDM). If the airbag light is on after installation, it means the two modules need to be re-synchronized. This is a simple procedure called ‘Setup SDM Primary Key in BCM’ that can be done with a bi-directional scan tool.
What happens to my old BCM? Is there a core charge?
There is no core charge. We always return your original module to you along with the newly cloned replacement. You can keep it as a spare or dispose of it as you see fit.
Is this a permanent fix for my truck’s electrical problems?
Yes, if the BCM is the root cause of the issues. This module is built to meet or exceed original equipment standards and addresses the common failure points of the factory units, providing a durable and reliable repair.