Solve Your Truck’s Electrical Headaches for Good
If you’re dealing with bizarre electrical issues in your 2003-2006 Chevrolet Avalanche 1500—like flickering lights, a dead instrument cluster, or power windows with a mind of their own—you’ve likely met the culprit: a failing Body Control Module (BCM). This isn’t just an annoyance; it’s a critical failure that can affect your vehicle’s security and daily operation. As the central command center for your truck’s body electronics, a faulty BCM can be a nightmare to diagnose. This module, part number 15137395, is the definitive solution, offered with a professional cloning service that makes replacement a breeze.
Case Study: The Ghost in the Machine
A customer brought in his ’05 Sierra with a list of complaints that sounded like the truck was haunted. The radio would turn on by itself, the dome light wouldn’t shut off, and worst of all, he’d find the battery dead every other morning. He’d already replaced the battery and alternator. After checking for parasitic draws, we isolated the BCM. Instead of a costly trip to the dealer for a new module and programming, we used our cloning service. We transferred all the original data to this replacement unit. The customer swapped it himself in his driveway in under 10 minutes. The electrical ghosts were gone, and his truck has been reliable ever since. This is the power of a simple, direct-fit solution.
Is Your GM Truck Showing These Telltale Signs?
A failing BCM doesn’t always throw a check engine light. Instead, it creates a pattern of strange electrical behavior. Over my 20+ years in the bay, these are the most common symptoms I’ve seen that point directly to a bad 2003-2006 Avalanche 1500 BCM or its equivalent in other GM models.
- ✔ Unresponsive or erratic power windows, door locks, and interior/exterior lights.
- ✔ HVAC blower motor or climate controls not working correctly.
- ✔ The security system acts up, causing a no-start condition (Security light on).
- ✔ An airbag warning light on the dash, often accompanied by diagnostic trouble code (DTC) B1001.
- ✔ Intermittent failure of the radio or instrument panel gauges.
- ✔ Communication errors with other modules on the vehicle’s network.
Your 5-Minute BCM Installation Guide
Our cloning service makes this one of the easiest electronic repairs you can do. By transferring your original module’s data, we eliminate the need for expensive dealership programming. You get a true plug-and-play part ready for installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On most GM trucks and SUVs like the Avalanche, Silverado, and Tahoe, 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.
- Swap the Module: Carefully unplug the electrical connectors from your old BCM. They have release tabs that need to be pressed. Once unplugged, remove the module (it’s often held by simple clips or a couple of small bolts). Install the new module and securely reconnect all connectors.
- Power Up: Reconnect the negative battery terminal. Start the vehicle and test all functions—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
- Post-Install Checks: In some cases, an airbag light may persist. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. Similarly, a Brake Pedal Position Relearn might be needed. Your original module will be returned to you with your order.
Verified Fitment for Your Truck or SUV
This BCM is a direct replacement for part number 15137395 and other interchangeable numbers. It is guaranteed to fit the following General Motors vehicles. Please match your part number or vehicle to ensure compatibility.
AVALANCHE 1500/2500 (2003-2006)
SILVERADO 1500/2500/3500 (2003-2007 Classic)
SUBURBAN 1500/2500 (2003-2006)
TAHOE (2003-2006)
EXPRESS 1500/2500/3500 VAN (2004-2007, w/ opt PRP)
GMC:
SIERRA 1500/2500/3500/DENALI (2003-2007 Classic)
YUKON / YUKON XL 1500/2500 (2003-2006)
SAVANA 1500/2500/3500 VAN (2004-2007, w/ opt PRP)
Cadillac:
ESCALADE / ESV / EXT (2003-2006)
Hummer:
H2 (2003-2007)
Interchangeable Part Numbers: 10383536, 15116066, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, 15194170
Frequently Asked Questions
What is the ‘Cloning Service’ and why do I need it?
Cloning is a service where we transfer the essential vehicle-specific data (like VIN, mileage, and security information) from your original BCM to this replacement unit. This makes the module plug-and-play, saving you from a mandatory and costly programming session at a dealership.
Do I need to send my original BCM to you?
Yes, for the cloning service to be performed, you will need to ship your original module to us. We perform the service and ship both your original and the ready-to-install replacement back to you.
My airbag light is on after installing the new BCM. What do I do?
This is a common security handshake procedure. The new BCM needs to be synchronized with the airbag’s Sensing and Diagnostic Module (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to clear the light.
Is this a difficult part for a DIY mechanic to replace?
Not at all. Thanks to our cloning service, the electronic side is handled. The physical replacement typically takes less than 10 minutes and only requires basic hand tools to access the module under the dash.
Will this fix my truck’s no-start problem?
If the no-start is caused by the factory security system (Passlock/VATS) being triggered by a faulty BCM, then yes, this will resolve the issue. A common symptom is a blinking security light on the dashboard when you try to start the engine.
Don’t let a faulty module keep your truck off the road. Order this professionally cloned 2003-2006 Avalanche 1500 BCM and restore your vehicle’s functionality and reliability with confidence.