Restore Full Functionality to Your Cadillac Escalade
Are you battling strange and frustrating electrical issues in your 2003-2006 Cadillac Escalade? Intermittent power windows, a climate control system with a mind of its own, or a security light that prevents your SUV from starting are classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of problems. This VIN-programmed replacement BCM, part number 15136877, is the definitive solution to restore your vehicle’s comfort, convenience, and security systems to perfect working order.
A Technician’s Notebook
“A 2005 Escalade ESV came into my bay last month with a list of complaints from the owner: the radio would cut out, the driver’s side window wouldn’t go down, and the HVAC blower was completely dead. He’d already replaced the blower motor resistor with no luck. A quick scan revealed a B1001 ‘Option Configuration Error’ and a handful of communication codes. This pointed directly to the BCM. After installing one of our pre-programmed modules, every single issue was resolved in less than 10 minutes. It’s a common failure point, and having a reliable, plug-and-play solution is a lifesaver for both shops and DIYers.”
Is Your Escalade Showing These Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely fix you need for your 2003-2006 Escalade BCM.
- ✔ The air conditioning or heater controls work sporadically or not at all.
- ✔ Your power door locks or windows fail to respond.
- ✔ The security system acts up, causing a no-start condition.
- ✔ An airbag warning light is illuminated on the dash, often with a DTC like B1001.
- ✔ Interior or exterior lights flicker, stay on, or won’t turn on.
- ✔ Wipers operate erratically or are completely unresponsive.
- ✔ Communication errors with other modules stored in the vehicle’s computer.
A Straightforward Guide to Installation
Getting your Escalade back to normal is easier than you think. This module is designed for a direct-fit replacement, and installation is a simple process that requires basic tools and just a few minutes of your time.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On the 2003-2006 Escalade, the BCM is located under the driver’s side of the dashboard, near the steering column.
- Remove the Old Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once unplugged, unclip or unbolt the module from its mounting bracket.
- Install the New BCM: Mount the new module in the same position and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start your vehicle and test all functions—lights, locks, windows, HVAC, and wipers—to confirm the repair.
Post-Installation Note: In some cases, a ‘Setup SDM Primary Key in BCM’ procedure may be needed if the airbag light remains on. This requires a professional scan tool. A brake pedal position relearn might also be necessary for certain models. Our included instructions provide more detail.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15136877 and is interchangeable with several other part numbers, including 15116066, 15198116, and 10383536. It fits a wide range of General Motors trucks and SUVs. While this page focuses on the 2003-2006 Escalade BCM, please confirm your vehicle’s fitment below:
- Cadillac: Escalade, Escalade ESV, Escalade EXT (2003-2006)
- Chevrolet: Avalanche 1500/2500 (2003-2006), Silverado & Sierra 1500/2500/3500 Crew Cab (2003-2007 Classic), Suburban 1500/2500 (2003-2006), Tahoe (2003-2006), Express Van (2004-2007 w/ PRP option)
- GMC: Sierra Denali (2003-2007 Classic), Yukon & Yukon XL 1500/2500 (2003-2006), Savana Van (2004-2007 w/ PRP option)
- Hummer: H2 (2003-2007)
Frequently Asked Questions
What does a Body Control Module do?
The BCM is a computer that acts as the central hub for your vehicle’s body electronics. It controls non-engine related functions like your lights, power windows, door locks, climate control, security system, and wipers.
Do I need to go to the dealer to have this part programmed?
No. This module comes pre-programmed to your vehicle’s specific VIN. This allows for a simple, plug-and-play installation without the need for expensive dealership programming.
What if my airbag light is on after I install it?
If the airbag light is on, it means the new BCM needs to be synchronized with the vehicle’s Sensing and Diagnostic Module (SDM). This is done via a ‘Setup SDM Primary Key’ procedure which requires a bi-directional scan tool. This is a common step for this repair.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old module without any hassle or extra cost.
Will this fix a no-start problem?
It can. If the BCM is failing to recognize the key’s security chip (Passlock/VATS system), it can prevent the vehicle from starting. A faulty BCM is a common cause of security-related no-start conditions in these GM vehicles.