Are you chasing down bizarre electrical issues in your Chevrolet Tahoe? One minute the power windows work, the next they don’t. Maybe your dashboard is lit up with warning lights, or the security system is preventing the engine from starting. As a technician with over two decades of experience, I’ve seen these exact frustrations countless times. The culprit is almost always a failing Body Control Module (BCM), the central command center for your vehicle’s comfort and convenience features.
This isn’t just a replacement part; it’s a permanent solution. We offer a professional Cloning Service for this 2003-2006 Tahoe BCM. This means we transfer the essential data from your original module directly to this replacement unit. The result? A true plug-and-play component that requires no expensive trip to the dealership for programming. It arrives ready to install, restoring full functionality and communication between your vehicle’s systems.
Case Study: A Tricky Diagnosis
A customer brought in a 2005 Suburban (a sister vehicle to the Tahoe) with a laundry list of complaints: intermittent A/C blower, radio presets that kept erasing, and a persistent airbag light. They had already replaced the battery and checked all the fuses. After connecting my scan tool, I found a series of U-codes (communication errors) and a B1001 DTC. Instead of just throwing parts at it, we inspected the BCM. We found subtle signs of internal corrosion on the circuit board, a common failure point. By installing a cloned BCM like this one, we cleared all codes and restored every function in under 30 minutes. It’s a textbook example of how a single module can cause widespread, confusing symptoms.
Is Your Tahoe Plagued by These Electrical Gremlins?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ HVAC system failures, such as a blower motor that won’t turn on or stays stuck on high.
- ✔ An active security light on the dash and a no-start condition (Passlock issues).
- ✔ An illuminated airbag warning light, often accompanied by DTC B1001.
- ✔ Interior or exterior lights that flicker, stay on, or don’t work at all.
- ✔ Inconsistent wiper operation or other accessory malfunctions.
Your 5-Minute Path to a Fully Functional Tahoe
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most 2003-2006 Tahoes, the BCM is located under the driver’s side of the dashboard, near the steering column.
- ✔ Swap the Modules: Carefully unplug the electrical connectors from your old BCM and remove it. Plug the connectors into your new, cloned module and secure it in place.
- ✔ Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair.
- ✔ Post-Install Checks: In some cases, an airbag light may require a ‘Setup SDM Primary Key’ procedure with a compatible scan tool. Similarly, a Brake Pedal Position relearn might be needed. See our FAQ for details.
Verified Fitment for Your GM Truck or SUV
This Body Control Module is a direct-fit replacement for part number 15136877 and is interchangeable with several other part numbers, including 15116066, 10383536, 15136225, and more. It is engineered for the following vehicles:
Chevrolet: Tahoe (2003-2006), Suburban 1500/2500 (2003-2006), Silverado 1500/2500/3500 Crew Cab (2003-2007 Classic), Avalanche 1500/2500 (2003-2006), Express Van (2004-2007 w/PRP option)
GMC: Yukon / Yukon XL 1500/2500 (2003-2006), Sierra 1500/2500/3500 Crew Cab (2003-2007 Classic), Sierra Denali (2003-2007 Classic), Savana Van (2004-2007 w/PRP option)
Cadillac: Escalade / ESV / EXT (2003-2006)
Hummer: H2 (2003-2007)
Frequently Asked Questions
Frequently Asked Questions
What exactly is a BCM Cloning Service?
Our Cloning Service is a process where we transfer your vehicle’s specific configuration data—like VIN, mileage, and options—from your old BCM to the replacement unit. This makes the new module a perfect electronic match for your vehicle, eliminating the need for dealership programming.
Do I need to send my original BCM to you?
Yes. For the cloning process to work, you must send us your original module after placing your order. We will perform the service and ship both your original and the newly cloned replacement back to you promptly.
Is there a core charge for this part?
No, there is no core charge. We always return your original module along with the programmed replacement, so you don’t have to worry about extra fees or core returns.
What if my airbag light is on after installation?
If the airbag light appears, it means the new BCM needs to be synchronized with the vehicle’s Sensing and Diagnostic Module (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. It’s a quick process for any qualified technician.
Will I need any special tools for installation?
Typically, no. The BCM is usually held in place with simple clips or small bolts, accessible with basic hand tools. The main requirement is careful handling of the electrical connectors. A professional scan tool is only needed for specific post-installation procedures like the airbag sync if the light is on.