End the Electrical Headaches in Your GMC Sierra
Is your 2003-2007 GMC Sierra 1500 suffering from bizarre electrical issues? One minute the power windows work, the next they don’t. The A/C blower motor has a mind of its own. Maybe you’re staring at an airbag light or, worse, the truck refuses to start. These aren’t random glitches; they’re classic signs of a failing Body Control Module (BCM), the central command center for your truck’s body electronics. This part, number 15136225, is a direct-fit solution, and our expert cloning service makes the repair process seamless.
A Technician’s Notebook
I remember a 2005 Sierra 1500 that came into the shop a few months back. The owner was at his wit’s end. The radio would cut out, the dome light flickered, and the security light was on, causing an intermittent no-start. He’d already replaced the battery and checked the grounds. After hooking up my scanner, I saw a handful of communication codes, including the notorious B1001 for an SDM configuration error. Instead of a complex wiring chase, my experience pointed directly to the BCM. A failing BCM can send corrupt data across the network, causing other modules to act up. By providing a cloned 2003-2007 Sierra 1500 BCM, we had him back on the road the same day, with all the gremlins gone for good.
Common Signs of a Failing BCM
The BCM is the root cause of many frustrating electrical problems. If your truck is experiencing any of the following, a faulty BCM is the likely culprit:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC blower motor or climate controls not working correctly.
- ✔ The security system light is illuminated, preventing the engine from starting.
- ✔ An active airbag warning light, often with a Diagnostic Trouble Code (DTC) like B1001.
- ✔ Headlights, taillights, or interior lights behaving erratically.
- ✔ Wipers turning on by themselves or not working at all.
A Straightforward Guide to Installation
Our cloning service makes this a job any DIYer or professional can handle in minutes. We transfer all the necessary data from your original module to this replacement, so you can skip the expensive trip to the dealership for programming.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting work.
- Locate the BCM: On most Sierra pickups, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with multiple large electrical connectors.
- Remove the Old Module: Carefully depress the locking tabs on each electrical connector and pull them straight out. Then, unclip the module from its mounting bracket. No special tools are needed.
- Install the New Module: Snap the new, programmed BCM into the mounting bracket and firmly reconnect all the electrical connectors until they click into place.
- Reconnect and Test: Reconnect the battery terminal. Start the truck and test all body functions—lights, locks, windows, HVAC, etc.—to confirm the repair is complete.
Post-Installation Notes
In some cases, additional steps may be required. If the airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Similarly, a ‘Brake Pedal Position Relearn’ might be necessary. These procedures vary by vehicle and option package. Always follow factory service manual recommendations.
Will This Fit My Truck?
This BCM is a confirmed fit for the following vehicles, specifically for models with the BCM located under the steering column. It is a direct replacement for part number 15136225 and other interchangeable numbers.
SIERRA 1500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
AVALANCHE 1500/2500 03-06 Body Control (BCM); (under steering column)
SILVERADO 1500/2500/3500 PICKUP 03-06 Body Control (BCM); (under steering column), Crew Cab
SILVERADO 1500/2500/3500 PICKUP 07 Body Control (BCM); classic style (creased door skin), 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)
CADILLAC ESCALADE, ESV, EXT 03-06 Body Control (BCM); (under steering column)
HUMMER H2 04-07 Body Control (BCM); (LH dash)
Frequently Asked Questions
What is a cloning service?
Our cloning service is a simple process where you send us your original BCM. We then transfer its unique, vehicle-specific data (for options, security, and mileage) to the replacement module. This ensures the new part is 100% plug-and-play, with no additional programming needed.
Do I need to send my original BCM to you?
Yes. For the cloning process to work, we must have your original module to extract the data. We will return your original module along with the newly programmed replacement.
Is there a core charge for this part?
No, there is no core charge. We always return your original module, so you don’t have to worry about extra fees or returning a core.
What if the airbag light is still on after installation?
If the airbag light remains on, it means the BCM and the SDM (airbag module) need to be synchronized. This requires a professional-grade scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a common final step on these GM vehicles.
What is the warranty on this module?
This Body Control Module comes with a one-year warranty, covering any defects in the part or the programming service, giving you peace of mind.