Finally, A Real Fix for Your GM Truck’s Electrical Problems
If you’re battling bizarre electrical issues in your 2003-2007 GMC Sierra 3500—like a dead climate control, flickering lights, or a security system that won’t let your truck start—you’ve likely pinpointed the culprit: a failing Body Control Module (BCM). As the central computer for your truck’s comfort and convenience features, when the BCM goes down, it takes a lot with it. Dealerships will quote you a hefty price for a new module plus mandatory programming fees. We offer a smarter, more affordable solution.
This is a direct-fit replacement BCM for your vehicle, but with a critical difference: our professional Cloning Service. We transfer the essential data from your original, faulty module directly onto this replacement unit. The result is a true plug-and-play component that works perfectly with your truck’s existing systems right out of the box. No trips to the dealer, no expensive scan tools, and no compatibility headaches. This is the definitive solution for getting your truck’s electronics back in order.
A Technician’s Notebook: The Work Truck That Wouldn’t Cooperate
I had a 2006 Sierra 3500 dually roll into my bay last month. The owner, a contractor, was at his wit’s end. Some days the truck started fine, other days the security light would flash and it was dead in the water. His power locks worked intermittently, and the radio would randomly shut off. He’d already replaced the battery and checked grounds. After hooking up my scanner, I saw a handful of communication codes and a B1001 (Option Configuration Error). This pointed straight to a failing BCM. Instead of a costly new unit and programming, we sent his original module for our cloning service. The new BCM arrived a few days later, I plugged it in in under five minutes, and every single issue was gone. The contractor was back on the job site the same day, saving him time and hundreds of dollars.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-functional HVAC controls and blower motor.
- ✔ Power windows, door locks, or interior/exterior lights behaving erratically or not working at all.
- ✔ An active airbag warning light, often accompanied by DTC B1001.
- ✔ Vehicle security system faults, leading to frustrating no-start or crank-no-start conditions.
- ✔ A cluster of seemingly unrelated diagnostic trouble codes (DTCs) related to body systems.
- ✔ Communication errors between various vehicle modules.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents short circuits and helps reset the system.
- ✔ Locate the Module: On most GM trucks and SUVs of this era, 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 Connectors: The BCM has several multi-pin connectors. Carefully depress the locking tabs on each connector and pull them straight out from the old module. Then, firmly plug them into the corresponding ports on your new cloned BCM.
- ✔ Mount the New Module: Secure the new BCM in the original mounting location.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, wipers, locks, windows, and HVAC to confirm the repair.
- ✔ Post-Install Checks: In some cases, a post-installation procedure may be needed. If the airbag light is on, an “Airbag System Sync” is required. A “Brake Pedal Position Relearn” may also be necessary on certain models. These procedures require a professional-grade scan tool.
How Our Cloning Service Works
This service is designed for simplicity and reliability. After you place your order, you will send us your original BCM. Our technicians will then perform a complete data transfer to the replacement module. This process copies your vehicle’s specific VIN, security information, and optional feature settings. We then ship both your original module and the ready-to-install cloned BCM back to you. There is no core charge because you always get your original part back.
Will This Fit My Truck?
This module is a direct replacement for part number 15136225 and other interchangeable numbers across a wide range of GM vehicles. Please verify your part number or match your vehicle in the list below.
AVALANCHE 2500 02-06 Body Control (BCM); (under steering column)
ESCALADE & ESV & EXT 03-06 Body Control (BCM); (under steering column)
EXPRESS/SAVANA 1500/2500/3500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
HUMMER H2 04-07 Body Control (BCM); (LH dash)
HUMMER H2 03 Body Control (BCM); ID 8116
SIERRA 1500/2500/3500 PICKUP 03-06 Body Control (BCM); Crew Cab (under steering column)
SIERRA 1500/2500/3500 PICKUP 07 Body Control (BCM); classic style, Crew Cab (under steering column)
SIERRA DENALI 03-06 Body Control (BCM); (under steering column)
SIERRA DENALI 07 Body Control (BCM); classic style (creased door skin), (under steering column)
SILVERADO 1500/2500/3500 PICKUP 03-06 Body Control (BCM); crew cab (under steering column)
SILVERADO 1500/2500/3500 PICKUP 07 Body Control (BCM); classic style, crew cab (under steering column)
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 transfer the exact configuration data—including your VIN and security keys—from your original BCM to the replacement unit. This makes the new module a perfect electronic match for your truck, eliminating the need for dealership programming.
Do I need any special tools for installation?
For the physical installation, you’ll only need basic hand tools to access the module under the dash. No programming tools are required. However, if an airbag light appears after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key’ procedure.
Is this part compatible with other numbers besides 15136225?
Yes, this module is interchangeable with a wide range of part numbers, including 15116066, 10383536, 15198116, and others. As long as your vehicle is on our compatibility list, this cloned module will work for you.
What happens to my old BCM?
We always return your original module to you along with the newly cloned, ready-to-install unit. We do not keep customer cores.
What if the airbag light stays on after I install the new BCM?
This can happen occasionally. It means the BCM needs to be electronically synced with the airbag system’s Sensing and Diagnostic Module (SDM). A repair shop with a professional-grade scanner can perform the “Setup SDM Primary Key in BCM” procedure to resolve this.