Tired of Unpredictable Electrical Failures in Your GM Truck?
If you’re dealing with a 2003-2007 Silverado 3500 that seems to have a mind of its own—with flickering lights, a dead HVAC system, or power windows that won’t cooperate—the root cause is often a failing Body Control Module (BCM). This component, part number 15116066, is the central command center for your truck’s body electronics. When it malfunctions, it can create a cascade of frustrating and seemingly unrelated problems. Instead of spending a fortune at the dealership, we offer a direct, reliable solution.
This isn’t just a replacement part; it’s a complete repair service. We utilize a professional Cloning Service, where we transfer the essential data from your original BCM directly onto this replacement unit. This process ensures the module is perfectly matched to your vehicle’s specific configuration, making installation a true plug-and-play experience. You get a fully functional module without the need for expensive dealer programming or relearn procedures.
Case Study: A Tricky Diagnosis
A few months back, a 2006 Sierra 2500 came into a partner shop with a bizarre list of complaints. The radio would turn on and off, the driver’s side window worked intermittently, and the airbag light was on with a B1001 code. The owner had already replaced the battery and checked all the fuses. After spending hours chasing grounds and testing circuits, we suspected the BCM. Instead of just swapping it, which would have required a tow to the dealer for programming, we used our cloning service. We transferred the data from his old, faulty module to our replacement 15116066. The new module was installed in under 10 minutes, and every single issue was resolved instantly. It’s a testament to how a targeted, pre-programmed part can save hours of diagnostic headaches and hundreds of dollars.
Is Your Truck Showing These Electrical Gremlins?
- ✔ The HVAC blower motor works only on high speed or not at all.
- ✔ Your power door locks or windows behave erratically or have stopped working.
- ✔ The security light is flashing, and the truck experiences a no-start condition.
- ✔ An airbag warning light is illuminated, often with a DTC like B1001 (Option Configuration Error).
- ✔ Interior or exterior lights (headlights, dome lights) flicker or fail to turn on/off correctly.
- ✔ The windshield wipers operate on their own or won’t function when commanded.
A Straightforward Guide to BCM Installation
Getting your truck back in order is easier than you think. In most GM trucks and SUVs, this job takes just a few minutes with basic hand tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most Silverado and Sierra models, the BCM is located under the driver’s side dashboard, near the steering column. It’s a black box with several large electrical connectors.
- Remove the Old Module: Carefully disconnect the wiring harnesses. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat your new, pre-programmed BCM into the mounting bracket and securely reconnect all wiring harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all body functions—windows, locks, lights, HVAC, and wipers—to confirm the repair was successful.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 15116066 and is interchangeable with several other part numbers, including 15136225, 15198116, and 10383536. It is designed for a wide range of General Motors vehicles. Please verify your specific model and options below.
AVALANCHE 2500 02-06 Body Control (BCM); (under steering column)
CADILLAC ESCALADE, ESV, EXT 03-06 Body Control (BCM); (under steering column)
CHEVROLET EXPRESS VAN 1500/2500/3500 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
CHEVROLET SILVERADO 1500/2500/3500 PICKUP 03-07 (classic style) Crew Cab
GMC SAVANA VAN 1500/2500/3500 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
GMC SIERRA 1500/2500/3500 PICKUP 03-07 (classic style) Crew Cab
GMC SIERRA DENALI 03-07 (classic style)
HUMMER H2 03-07 Body Control (BCM); (LH dash)
SUBURBAN 1500/2500 03-06 Body Control (BCM); (under steering column)
TAHOE 03-06 Body Control (BCM); (under steering column)
YUKON & YUKON XL 1500/2500 03-06 Body Control (BCM); (under steering column)
Frequently Asked Questions
Frequently Asked Questions
How does the Cloning Service work?
After you place your order, you will send us your original Body Control Module. Our technicians will extract the vehicle-specific data and transfer it to the replacement unit. This ensures all your vehicle’s options and security information are retained, making the installation process plug-and-play.
Do I need to send my old BCM in? What about a core charge?
Yes, the cloning process requires your original module to transfer the data. However, there is no core charge, and we always return your original module to you along with the newly programmed replacement.
My airbag light is on. Will this fix it?
A faulty BCM is a common cause of an airbag light with DTC B1001. This replacement will resolve that. In some cases, after installation, a procedure called ‘Setup SDM Primary Key in BCM’ may be needed using a professional scan tool to sync the systems and turn off the light.
Are any other procedures needed after installation?
Occasionally, some models may require a Brake Pedal Position (BPP) sensor relearn to ensure proper brake light and traction control operation. This is a simple procedure that can be performed with many bidirectional scan tools. Always consult a service manual for your specific vehicle.
What kind of warranty is included?
This Body Control Module is backed by our one-year warranty, giving you peace of mind and guaranteeing its reliability for daily driving and heavy-duty work scenarios.