Restore Full Electrical Function to Your GM Truck or SUV
Are you dealing with baffling electrical problems in your 2002 GM vehicle? Flickering interior lights, power windows with a mind of their own, or a persistent “Service 4×4” message on the dash are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and unpredictable issues. In my 20+ years as a technician, I’ve seen these modules cause headaches for countless owners. This isn’t just a part; it’s the solution to getting your truck’s reliability back.
This is a direct-replacement Body Control Module, arriving at your door fully programmed with the latest GM software updates. We handle the programming for you before we ship—simply provide your vehicle’s VIN during checkout. This critical step ensures the module communicates perfectly with your truck’s existing systems, saving you a costly trip to the dealership for programming. This is the most efficient way to solve your electrical gremlins and get back on the road with confidence.
Case Study: A Tricky Diagnosis
A customer brought in his 2002 Chevy Tahoe with a list of bizarre symptoms: the radio would turn off randomly, the driver’s side power window wouldn’t work, and the security light was always on, sometimes preventing the truck from starting. He’d already replaced the battery and checked all the fuses. After connecting my scan tool, I found multiple communication loss codes pointing to the BCM. These modules are notorious for internal circuit board failures that create these exact kinds of phantom problems. We installed a VIN-programmed BCM just like this one, and every single issue was resolved instantly. It’s a fix I’ve performed hundreds of times on these GMT800 platform vehicles.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and interior lights.
- ✔ The security system light stays on, or the vehicle won’t start intermittently.
- ✔ Instrument cluster gauges behaving abnormally or not working at all.
- ✔ The “Service 4WD” or other warning messages appear for no reason.
- ✔ Communication Diagnostic Trouble Codes (DTCs) like U-series codes (e.g., U0140, U0100) are stored in other modules.
- ✔ Horn, wipers, or other accessories working intermittently.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- ✔ Locate the BCM: On most of these models, the BCM is located under the driver’s side of the dashboard, near the steering column. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- ✔ Final Steps: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting the engine) and test all body functions like windows, locks, and lights.
Important Post-Installation Information
While this module is programmed for your VIN, some vehicle systems may require a final handshake procedure. Please be aware of the following possibilities:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary. This requires a professional-grade scan tool to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be needed to ensure correct brake light operation and traction control function.
We believe in transparency. Not every vehicle will require these steps, but we want you to be fully informed. Always consult a factory service manual for your specific vehicle if you are unsure.
Will This Fit My Truck?
This BCM is a guaranteed fit for the following 2002 models. It directly replaces service numbers: 15063577, 15081857, 19208544, 15095335, DKAJ, DPNW.
- 2002 Cadillac Escalade (4×4)
- 2002 Cadillac Escalade EXT
- 2002 Chevrolet Avalanche 1500 (4×4)
- 2002 Chevrolet Suburban 1500 (4×4)
- 2002 Chevrolet Tahoe (4×4)
- 2002 GMC Yukon (4×4)
- 2002 GMC Yukon XL 1500 (4×4)
Frequently Asked Questions
Do I need to program this module?
No. We program the module to your vehicle’s specific VIN before we ship it to you. This makes the installation process much simpler and avoids a trip to the dealer.
Where is the BCM located on my 2002 Yukon XL?
The Body Control Module is typically found under the driver’s side dashboard, attached near the steering column.
Is there a core charge for this part?
No, there is no core charge. You can keep your original module without needing to send it back.
What if my airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically introduced to the airbag module (SDM). This procedure, called ‘Setup SDM Primary Key in BCM’, must be done with a professional scan tool.
What information do you need from me?
After you complete your purchase, please provide us with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your BCM without it.