Fix Persistent Electrical Problems in Your GM Truck
Are you chasing down frustrating electrical gremlins in your 2003-2007 GMC Sierra 3500 or other compatible GM truck? A faulty Body Control Module (BCM) is often the culprit behind a host of baffling issues, from flickering lights and a dead HVAC system to security lockouts that leave you stranded. This replacement BCM, part number 15136877, is the definitive solution. We utilize a professional Cloning Service, which means we transfer the exact data from your original module to this replacement unit. The result is a true plug-and-play component that requires no expensive trip to the dealership for programming.
From the Diagnostic Bay: A Common GM Truck Scenario
I remember a 2006 Silverado 2500 that came into my shop with a laundry list of complaints. The owner said the radio would turn on by itself, the power locks worked intermittently, and sometimes the truck wouldn’t start, showing only a ‘Security’ light on the dash. He had already replaced the battery and checked the grounds. After hooking up my scanner, I saw a handful of communication codes, including the notorious B1001. In my 20+ years of experience, this points directly to an internal BCM failure. We performed our cloning service on a replacement BCM, and the customer installed it himself in 10 minutes. The truck’s electrical systems were immediately restored to perfect working order, solving all issues in one go.
Is Your GM Truck Showing These Telltale Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution your vehicle needs:
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors that work sporadically or not at all.
- ✔ HVAC controls are unresponsive, or the blower motor won’t turn on.
- ✔ 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 a related DTC like B1001 (Option Configuration Error).
- ✔ Multiple communication or body-related Diagnostic Trouble Codes (DTCs) are stored in the system.
The Advantage of Our BCM Cloning Service
Why choose our cloning service over a generic programmed module? When we clone your original BCM, we are making an exact copy of its software, including all the specific settings and options for your vehicle’s trim level. This ensures every feature works exactly as it did from the factory. You simply send us your original module, we perform the service, and we ship both your original and the ready-to-install cloned replacement back to you. There’s no core charge and no guesswork.
A Straightforward Guide to Your BCM Installation
Installing your cloned 2003-2007 Sierra 3500 BCM is a simple job for any DIYer or professional mechanic. The entire process typically takes less than 15 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: On most GM trucks like the Sierra and Silverado, the BCM is located under the driver’s side dashboard, near the steering column. On Savana and Express vans, it’s often behind the center dash panel.
- Swap the Modules: Carefully unplug the electrical connectors from your old BCM and remove it from its mounting bracket. Install the new, cloned BCM in its place and securely re-attach all connectors.
- Reconnect and Test: Reconnect the battery terminal. Start your vehicle and test all body functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.
- Post-Installation Checks: In some cases, a procedure like an ‘Airbag System Sync’ or ‘Brake Pedal Position Relearn’ may be needed if related warning lights appear. This requires a professional scan tool but is not always necessary.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15136877 and other interchangeable numbers. It fits a wide range of General Motors trucks, vans, and SUVs. Please verify your vehicle is on the list below.
AVALANCHE 2500 02-06 Body Control (BCM); (under steering column)
ESCALADE & ESV & EXT 03-06 Body Control (BCM); (under steering column)
HUMMER H2 03-07 Body Control (BCM); (LH dash)
EXPRESS/SAVANA 1500/2500/3500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SIERRA 1500 PICKUP 03-06 Body Control (BCM); (under steering column), Crew Cab
SIERRA 1500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
SIERRA 2500 PICKUP 03-05 Body Control (BCM); (under steering column), Crew Cab
SIERRA 2500 PICKUP 06-07 Body Control (BCM); (under steering column), Crew Cab
SIERRA 3500 PICKUP 03-07 Body Control (BCM); (under steering column), Crew Cab
SIERRA DENALI 03-07 Body Control (BCM); (under steering column)
SILVERADO 1500 PICKUP 03-06 Body Control (BCM); (under steering column), Crew Cab
SILVERADO 1500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
SILVERADO 2500 PICKUP 03-05 Body Control (BCM); (under steering column), Crew Cab
SILVERADO 2500 PICKUP 06-07 Body Control (BCM); (under steering column), Crew Cab
SILVERADO 3500 PICKUP 03-07 Body Control (BCM); (under steering column), crew cab
SUBURBAN 1500/2500 03-06 Body Control (BCM); (under steering column)
TAHOE 03-06 Body Control (BCM); (under steering column)
YUKON & YUKON XL 1500/2500 03-06 Body Control (BCM); (under steering column)
Frequently Asked Questions
What is a BCM cloning service?
Cloning is a process where we read the unique software and vehicle-specific configuration data from your original BCM and write it directly onto the replacement module. This creates a perfect 1-to-1 copy, ensuring seamless compatibility without any additional programming.
Do I need to send my original BCM to you?
Yes. For the cloning service to work, we need your original module to extract the data. After the service is complete, we will return your original module along with the newly cloned, ready-to-install replacement.
Will this fix my airbag light?
If the airbag light is caused by a BCM communication error (like DTC B1001), this will resolve the root cause. However, if the light stays on after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure with a pro-level scan tool may be required to sync the systems.
Is this a difficult part to install myself?
Not at all. For anyone comfortable with basic hand tools, this is a very straightforward job. The module is typically held in by simple clips or small bolts and is easily accessible under the dashboard, making for a quick swap.