Are you battling persistent and frustrating electrical issues in your 2003-2006 Cadillac Escalade? When your power windows, door locks, lights, or HVAC system start acting erratically, the root cause is often a failing Body Control Module (BCM). This replacement BCM, corresponding to GM part number 15116066, is the reliable, long-term solution to restore full electronic functionality and peace of mind to your vehicle. It serves as the central command center for your truck or SUV’s body electronics, and a faulty one can create a cascade of seemingly unrelated problems.
We make the repair process simple with our professional Cloning Service. Instead of just programming a new module with factory data, we transfer the exact operational data from your original BCM to this replacement unit. This ensures a perfect match to your vehicle’s specific configuration and options, eliminating the need for costly and time-consuming dealership visits for programming. It’s a true plug-and-play fix designed for both professional technicians and DIY enthusiasts.
Is Your GM Vehicle Showing These BCM Failure Signs?
- ✔ Intermittent or non-functional power windows, door locks, or interior/exterior lighting.
- ✔ The HVAC system or blower motor works sporadically or not at all.
- ✔ An active airbag warning light, often accompanied by diagnostic trouble code (DTC) B1001.
- ✔ Strange security system behavior, including random alarm activation or a no-start condition due to an anti-theft system fault.
- ✔ Unexplained battery drain or issues that seem like a bad ground.
- ✔ A variety of communication or function-specific DTCs stored in the vehicle’s memory.
A Technician’s Notebook: The Escalade with a Mind of Its Own
I remember a 2005 Escalade ESV that came into my shop with a laundry list of complaints. The owner was at his wit’s end. The dome lights would flicker, the driver’s side window wouldn’t go down, and occasionally, the truck wouldn’t start, showing a ‘Service Theft System’ message. He’d already replaced the battery and checked the main grounds. After hooking up my scanner, I saw a dozen communication codes pointing everywhere and nowhere. This is a classic sign of a failing 2003-2006 Escalade BCM. The internal logic board develops micro-fractures over time, causing intermittent connections. We used our cloning service to transfer his data to a new BCM. The installation took less than 10 minutes, and every single electrical gremlin was gone. It’s a fix that saves hours of diagnostic headaches.
Your 5-Minute Path to a Perfect Fix
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic repair.
- ✔ Locate the BCM: On most compatible models like the Escalade, Tahoe, or Silverado, the BCM is located under the driver’s side dashboard, near the steering column.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, remove the module from its mounting bracket.
- ✔ Install the New Module: Seat the new, cloned BCM into the mounting bracket and firmly reconnect all electrical connectors until they click into place.
- ✔ Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions—windows, locks, lights, wipers, and HVAC—to confirm the repair was successful.
Post-Installation Checks: What to Know
While our cloning service makes this a plug-and-play repair, some GM systems require a ‘handshake’ after a new module is introduced. Be aware of these potential, but not always necessary, procedures:
- Airbag System Sync: If the airbag light remains on after installation, a technician will need to perform the “Setup SDM Primary Key in BCM” procedure using a professional scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position relearn may be required to ensure accurate brake light operation and to satisfy the traction control system.
Disclaimer: Vehicle systems can vary. For detailed procedures specific to your vehicle, always refer to a factory service manual or consult with a certified mechanic.
Verified Compatibility for Your GM Truck or SUV
This BCM is a direct replacement for part number 15116066 and is interchangeable with several other part numbers, including 10383536, 15136225, 15198116, and 15257043. It is designed to fit a wide range of popular GM models. Please verify your vehicle in the list below:
Cadillac (2003-2006): Escalade, Escalade ESV, Escalade EXT
Chevrolet (2003-2007): Avalanche 1500/2500, Silverado 1500/2500/3500 (including Classic), Suburban 1500/2500, Tahoe, Express/Savana Vans (with opt PRP)
GMC (2003-2007): Sierra 1500/2500/3500 (including Classic & Denali), Yukon, Yukon XL
Hummer (2003-2007): H2
Solving the electrical problems in your GM vehicle is straightforward with the right part. This cloned 2003-2006 Escalade BCM provides a reliable, dealer-free solution. Order today and get your vehicle’s features working like new again.
Frequently Asked Questions
What is the ‘Cloning Service’ and why do I need it?
Our cloning service transfers the unique software and vehicle-specific settings from your old BCM to the new one. This makes the module plug-and-play, avoiding the need for expensive programming at a dealership and ensuring all your vehicle’s original options work correctly.
Do I need to send my old BCM to you?
Yes. For the cloning service to work, you must send us your original Body Control Module after placing your order. We will perform the service and ship both your original and the newly cloned replacement module back to you.
Is this a difficult part for a DIYer to replace?
Not at all. The physical replacement is one of the easier module swaps. It’s typically held in place by simple clips or bolts and is accessible under the driver’s side dashboard. The entire swap can often be done in under 15 minutes with basic hand tools.
What if the airbag light comes on after I install it?
This is a known possibility with GM vehicles. It simply means the new BCM needs to be electronically introduced to the airbag module (SDM). A repair shop with a capable bi-directional scan tool can perform the ‘Setup SDM Primary Key’ procedure in a few minutes to resolve this.
Will this fix my intermittent no-start problem?
If your no-start issue is related to the Passlock or Passkey anti-theft system, which is controlled by the BCM, then yes, this is very likely the solution. A failing BCM is a primary cause of security system faults on these vehicles.
What is your warranty on this part?
This Body Control Module comes with a one-year warranty, covering any defects in the part or the cloning service. We stand behind our work to ensure your vehicle is repaired correctly.