Restore Your Truck’s Electronics with a Reliable BCM Solution

If your 2003-2006 Chevrolet Avalanche 1500 is plagued by bizarre electrical issues—like power windows with a mind of their own, a dead HVAC system, or a security light that prevents it from starting—you’ve likely pinpointed the culprit: a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating problems. This isn’t just an inconvenience; it can affect your vehicle’s safety and security. Our expert cloning service provides a dependable, direct-fit solution with this OEM-quality module, getting your truck back to full operational health without a costly trip to the dealership.

Is Your Avalanche Showing These Symptoms?

A failing BCM can manifest in numerous ways. Over my 20+ years in diagnostics, I’ve seen these modules cause some of the most confusing electrical problems. Here are the most common signs that your BCM needs replacement:

• ✔ Intermittent or non-functional power windows, door locks, or interior lights.
• ✔ The HVAC blower motor works sporadically or not at all, even after replacing the motor or resistor.
• ✔ An active airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
• ✔ The security or anti-theft system malfunctions, causing a no-start or crank-no-start condition.
• ✔ Unpredictable behavior from windshield wipers or exterior lighting.
• ✔ A cluster of seemingly unrelated body-related DTCs stored in the vehicle’s memory.

How Our BCM Cloning Service Works for Your 2003-2006 Avalanche 1500 BCM

Forget about dealership appointments and programming hassles. Our unique cloning service makes this repair straightforward. You simply send us your original BCM. We then perform a precise, bit-for-bit transfer of all critical data—including your vehicle’s VIN, security information, and specific options—to this replacement module. This process ensures the new BCM is a perfect electronic match for your truck. It arrives back at your door, ready for plug-and-play installation. We always return your original module with the newly programmed one, and there is no core charge.

A Straightforward Guide to BCM Installation

Installing your cloned BCM is a job most DIYers can handle in minutes. The module is typically located under the driver’s side dashboard, near the steering column.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
2. Locate the BCM: On most GM trucks of this era, you’ll find it mounted to a bracket under the steering column. It’s a black plastic box with several large multi-pin connectors.
3. Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unclip or unbolt the module from its mounting bracket.
4. Install the New Module: Seat the cloned BCM into the bracket and firmly reconnect all electrical connectors until they click into place.
5. Reconnect and Test: Reattach the negative battery terminal. Turn the key to the ‘On’ position and test all functions: windows, locks, lights, wipers, and the HVAC system.

Post-Installation Note: In some cases, an airbag light may appear. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. Additionally, a Brake Pedal Position relearn might be needed on certain models to ensure proper brake light and traction control function. Always refer to a service manual for vehicle-specific details.

Verified Vehicle Compatibility

This Body Control Module is a direct replacement for part number 15064149 and other interchangeable numbers on a wide range of General Motors trucks and SUVs. While this page focuses on the 2003-2006 Avalanche 1500 BCM, please verify your part number and check the comprehensive list below for your specific model.