Are you chasing electrical gremlins in your 2003-2006 Chevrolet Avalanche 1500? If you’re dealing with flickering lights, a dead instrument cluster, unresponsive power windows, or a frustrating no-start condition due to a security system fault, a failing Body Control Module (BCM) is the likely culprit. As the central command center for your truck’s body electronics, a faulty BCM can create a cascade of baffling and intermittent problems. Stop throwing parts at the issue and get the definitive solution.
This isn’t just a replacement part; it’s a complete repair service. We provide a quality-tested replacement BCM, part number 15137393, paired with our expert Cloning Service. This means we transfer the critical data—including VIN, mileage, and security information—from your original module directly onto the replacement unit. The result is a true plug-and-play component that requires no expensive trip to the dealership for programming. It will behave exactly as your original module did when it was working correctly, restoring full functionality to your vehicle’s systems.
Case Study: A Tricky Diagnosis
A customer brought in a 2005 Silverado 2500, a sister truck to the Avalanche, with a classic BCM failure story. The radio would turn on by itself, the door locks would cycle randomly while driving, and the HVAC blower was completely dead. They had already replaced the blower motor resistor with no luck. After connecting my scanner, I saw a slew of communication DTCs and a B1001 code. These widespread, unrelated electrical issues almost always point to the BCM. Instead of a costly new module and programming, we performed a cloning service. The customer sent us their old BCM, we cloned it, and sent both units back. They installed the replacement in under 10 minutes, and every single issue was resolved instantly. That’s the power of a proper data transfer.
Is Your GM Truck Showing These Telltale Signs?
- ✔ Intermittent or non-functional power windows, door locks, or interior/exterior lighting.
- ✔ HVAC system problems, such as a blower motor that won’t turn on or stays stuck on one speed.
- ✔ The security light is on or flashing, potentially causing a no-crank or no-start situation.
- ✔ An airbag warning light on the dash, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Unpredictable behavior from gauges, wipers, or the radio.
- ✔ Communication errors with other modules on the data network.
A Straightforward Guide to Your BCM Swap
Replacing your 2003-2006 Avalanche 1500 BCM is a simple job for any DIYer. 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 BCM: On most GM trucks and SUVs of this era, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black plastic box with several large multi-pin connectors.
- Remove the Old Module: Carefully release the locking tabs on each electrical connector and unplug them. The module is typically held in place by a few small bolts or plastic clips. Remove them and take out the old BCM.
- Install the New Module: Seat the cloned replacement BCM in the mounting bracket and secure it. Firmly plug in all the electrical connectors until they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, windows, locks, wipers, and HVAC to confirm the repair was successful.
Verified Vehicle Compatibility
This cloning service is compatible with BCM part number 15137393 and its interchanges, which are factory-installed in a wide range of General Motors vehicles. Please verify your part number before ordering. Key models include:
- Chevrolet Avalanche 1500/2500: 2003-2006
- Chevrolet Silverado & GMC Sierra 1500/2500/3500 (Crew Cab): 2003-2007 Classic
- Chevrolet Suburban & GMC Yukon XL: 2003-2006
- Chevrolet Tahoe & GMC Yukon: 2003-2006
- Cadillac Escalade, ESV, EXT: 2003-2006
- Hummer H2: 2003-2007
- Chevrolet Express & GMC Savana Van (w/ opt PRP): 2004-2007
This part is interchangeable with the following part numbers: 10383536, 15116066, 15136225, 15136877, 15137394, 15137395, 15198116, 15257043, and more.
Frequently Asked Questions
How does the BCM cloning service work?
You send us your original, faulty BCM. We use specialized equipment to extract the unique vehicle data and transfer it to your replacement module. This makes the new unit an exact electronic match for your truck, ensuring seamless integration without any additional programming. We then ship both your original and the ready-to-install replacement back to you.
Will this fix my no-start problem?
If your no-start issue is caused by the BCM’s control over the Passlock/Passkey security system, then yes, this service will resolve it. Because we clone your security data, the vehicle will recognize the replacement module and allow it to start.
Do I need a scan tool after installation?
In most cases, no. However, if your airbag light comes on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules. Some models may also require a Brake Pedal Position Relearn. These are simple procedures for any competent mechanic.
Is there a core charge for my old part?
No, there is absolutely no core charge. We require your original module to perform the cloning service, and it will always be returned to you along with the programmed replacement unit.