Tired of Chasing Electrical Gremlins in Your GM Truck?
If you’re dealing with baffling electrical issues in your 2003-2006 Chevrolet Avalanche 1500, you’re not alone. Flickering lights, a dead climate control panel, or power windows with a mind of their own are classic signs of 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 replacement BCM, part number 15116066, is the definitive solution to restore your vehicle’s proper function and reliability.
We make the repair process simple with our professional Cloning Service. You send us your original BCM, and we transfer its unique vehicle data directly to this replacement unit. The module you receive back will be fully programmed to your VIN and vehicle options, making installation a true plug-and-play experience. You get to skip the expensive trip to the dealership for programming, saving you time and money.
Case Study: A Tricky Diagnosis
I had a 2005 Silverado 2500 in the shop that was driving its owner crazy. The radio would cut out, the power locks would cycle randomly, and the security light would stay on, preventing it from starting. The owner had already replaced the battery and checked the main fuses. After hooking up my scanner, I saw a dozen communication codes pointing to the BCM. A quick check of the wiring harness under the driver’s side dash revealed the problem: a corroded ground connection right near the BCM, a common failure point. This corrosion had sent voltage spikes through the module, damaging its internal circuits. By replacing the BCM and repairing the ground, we solved all the ghost issues in one go.
Is Your Truck Exhibiting These Electrical Symptoms?
A failing BCM doesn’t always trigger a check engine light, often leaving owners and technicians guessing. Here are the most common indicators I’ve seen in my 20+ years of diagnostics:
- ✔ Unresponsive or intermittent HVAC and climate controls.
- ✔ Power windows, door locks, or mirrors not working correctly.
- ✔ The security system acting up, causing a no-start condition.
- ✔ An airbag warning light on the dash, often with a DTC like B1001 (Setup SDM Primary Key in BCM).
- ✔ Interior dome lights or exterior lights staying on or not turning on at all.
- ✔ Erratic windshield wiper operation.
A Straightforward Guide to Installation
With our cloning service, installing your new BCM is an easy job for any DIYer. The 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 like the Avalanche, the BCM is located under the driver’s side of the dashboard, near the steering column.
- Remove the Old Module: Carefully disconnect the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unclip or unbolt the module from its mounting bracket.
- Install the New Module: Seat the replacement BCM into the bracket and firmly reconnect all electrical connectors. You’ll hear a click when they are secure.
- Reconnect the Battery: Reattach the negative battery terminal. Your vehicle’s core functions should now be restored.
- Post-Installation Checks: In some cases, an airbag light may persist. This requires an “SDM Primary Key Setup” with a capable scan tool. A brake pedal position relearn might also be needed. Please see our FAQ for more details.
Verified Vehicle Compatibility
This module is a direct fit for a wide range of General Motors vehicles. Please verify your part number and model for a perfect match. This part is interchangeable with the following numbers: 10383536, 15116066, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, 15194170.
AVALANCHE 1500 03-06 (under steering column)
AVALANCHE 2500 02-06 (under steering column)
CADILLAC ESCALADE, ESV, EXT 03-06 (under steering column)
HUMMER H2 03-07 (LH dash)
CHEVROLET/GMC SILVERADO/SIERRA 1500, 2500, 3500 (Crew Cab) 03-07 Classic (under steering column)
CHEVROLET/GMC SUBURBAN/YUKON XL 1500, 2500 03-06 (under steering column)
CHEVROLET TAHOE / GMC YUKON 03-06 (under steering column)
CHEVROLET/GMC EXPRESS/SAVANA VANS 04-07 (center dash, w/ opt PRP)
Please verify specific options as fitment can vary.
Frequently Asked Questions (FAQ)
Frequently Asked Questions
What exactly is a “Cloning Service”?
Our cloning service involves transferring the essential software and vehicle-specific data (like VIN, mileage, and options) from your original, faulty BCM to the replacement unit. This ensures the new module is a perfect digital match for your truck, eliminating the need for dealership programming.
Do I need to send my original BCM to you?
Yes. For the cloning process to work, we need your original module to extract the data. We will return your original module along with the newly programmed replacement.
Will this fix my airbag light that came on with the other issues?
It often does, but sometimes a post-installation procedure is needed. If the airbag light stays on after installation, a technician will need to perform the ‘Setup SDM Primary Key in BCM’ function with a professional scan tool to sync the airbag system with the new BCM.
Is there a core charge for this part?
No, there is no core charge. We require your original module for the cloning service, and it will be returned to you with your order. You get to keep your old part.
How difficult is the installation for a DIYer?
The physical installation is very straightforward. The BCM is typically held in by clips or a few bolts under the driver’s side dashboard and has simple plug-in connectors. Because our unit comes pre-programmed, you avoid the most difficult part of the job—the software setup.