Solving the Electrical Headaches in Your GM Truck
If you’re dealing with bizarre electrical issues in your 2003-2006 Chevrolet Avalanche 1500—like the radio acting up, power windows with a mind of their own, or an intermittent no-start condition that leaves you stranded—you’ve likely met the culprit: a failing Body Control Module (BCM). As the central command for your truck’s body electronics, when the BCM falters, it creates a cascade of frustrating and unpredictable problems. This isn’t just an inconvenience; it can affect vehicle security and safety. This replacement BCM, part number 10367690, is the definitive solution to restore order and reliability to your vehicle.
Case Study: A Tricky Diagnosis
I once had a 2005 Silverado in the shop that was driving its owner crazy. The gauges would randomly die, the A/C would stop blowing cold, and the security light would flash, preventing it from starting. He’d already replaced the battery and checked all the fuses. After connecting my scanner, I saw a dozen communication codes pointing in different directions. This is a classic sign. Instead of a dozen separate problems, it was one central failure. The BCM’s internal logic was corrupted. By installing a cloned BCM, we transferred the truck’s exact configuration. The moment it was plugged in, every single issue vanished. It’s a reminder that sometimes the most chaotic symptoms have the simplest single-point solution.
Diagnosing a Faulty 2003-2006 Avalanche BCM
A failing BCM doesn’t always throw a clear-cut check engine light. Instead, it manifests as a collection of strange electrical behaviors. If your truck is experiencing these issues, the BCM is the most likely cause. Our cloning service for this 2003-2006 Avalanche BCM ensures that your replacement module is a perfect match, eliminating the need for a trip to the dealership for expensive programming.
- ✔ Non-responsive or erratic power windows, door locks, or interior lights.
- ✔ HVAC controls not working or the blower motor functioning intermittently.
- ✔ The security system acting up, causing a no-start or crank-no-start condition.
- ✔ An airbag warning light on the dash, often with a DTC like B1001 (Option Configuration Error).
- ✔ Unpredictable behavior from wipers, radio, or instrument cluster gauges.
- ✔ A network of communication-related Diagnostic Trouble Codes (DTCs).
A Straightforward Guide to Installation
Replacing the BCM is a job most DIYers can handle in their own driveway in just a few minutes. Our cloning service makes it a true plug-and-play process.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work. This prevents shorts and helps reset the vehicle’s systems.
- Locate the BCM: On most GM trucks of this era, including the Avalanche, the BCM is located under the driver’s side dashboard, near the steering column. It’s a black plastic box with several large electrical connectors.
- Swap the Modules: Carefully unplug the wiring harnesses from your old BCM. They have release tabs that need to be pressed. Unbolt or unclip the old module and remove it. Mount the new, cloned BCM in its place.
- Reconnect and Test: Securely plug all wiring harnesses into the new BCM. You’ll hear them click into place. Reconnect the battery terminal. Start the truck and test all functions: windows, locks, wipers, lights, and HVAC to confirm the fix.
Post-Installation Procedures & Our Cloning Service
Our unique cloning service means we transfer the vital data from your original BCM to this replacement unit. This ensures all your vehicle’s specific options and security information are retained. You simply send us your original module, and we return it to you along with the ready-to-install replacement. There is no core charge. In some cases, minor relearn procedures may be needed after installation. This is normal and can vary by vehicle. A professional scan tool may be required for these steps:
- Airbag System Sync: If the airbag light stays on, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the modules.
- Brake Pedal Position Relearn: Some models may require this to ensure proper brake light and stability control function.
Will This Fit My Truck?
This BCM is a direct-fit replacement for a wide range of General Motors trucks and SUVs. Please verify your part number. This module is interchangeable with part numbers 15116066, 10383536, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 15064149, and 15194170.
AVALANCHE 2500 02-06 Body Control (BCM); (under steering column)
CADILLAC ESCALADE, ESV, EXT 03-06 Body Control (BCM); (under steering column)
CHEVROLET/GMC EXPRESS/SAVANA VANS 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
CHEVROLET/GMC SILVERADO/SIERRA 1500, 2500, 3500 03-07 (Classic Style) Body Control (BCM); (under steering column), Crew Cab models
CHEVROLET SUBURBAN 1500/2500 03-06 Body Control (BCM); (under steering column)
CHEVROLET TAHOE 03-06 Body Control (BCM); (under steering column)
GMC YUKON & YUKON XL 1500/2500 03-06 Body Control (BCM); (under steering column)
HUMMER H2 03-07 Body Control (BCM); (LH dash)
Frequently Asked Questions
How does the cloning service work?
You ship your original BCM to us. We use specialized equipment to extract the vehicle-specific data and flash it onto the replacement module. We then ship both your original module and the ready-to-install replacement back to you.
Do I need any special tools for installation?
For the physical replacement, you’ll likely only need basic hand tools like a socket set to access the module. For potential post-installation procedures like an airbag sync, a professional-grade bidirectional scan tool is required.
What happens if I still have problems after installation?
First, double-check all connector plugs are fully seated. If issues persist, it could indicate a problem elsewhere in the wiring or with another component. The cloning process ensures the BCM itself is not the issue.
Why is cloning better than getting a used BCM from a junkyard?
A junkyard BCM is programmed for a different vehicle. It will not have the correct VIN or options, leading to security lockouts, warning lights, and features that don’t work. Our cloning service makes this module specific to your truck.
Is there a warranty on this part?
Yes, this Body Control Module comes with a one-year warranty, giving you peace of mind and confidence in your repair.