Restore Control and Reliability to Your GM Truck
If you’re dealing with a frustrating array of electrical problems in your 2002 GM truck or SUV—from power windows that have a mind of their own to a security light that won’t turn off—you’re likely facing a failing Body Control Module (BCM). As the central nervous system for your vehicle’s body electronics, a faulty BCM can cause chaos. I’ve seen it countless times in my shop: a perfectly good engine that won’t start or accessories that work intermittently, all traced back to this single component. This isn’t just an inconvenience; it can leave you stranded. We offer a dependable, straightforward solution: a replacement BCM, pre-programmed specifically for your vehicle.
Forget the expensive trip to the dealership for programming. You provide us with your vehicle’s VIN after purchase, and our technicians will flash this module with the latest official GM software updates. This ensures it communicates perfectly with your truck’s other systems right out of the box. This is the most efficient way to get your vehicle back to 100% functionality, saving you time, money, and the headache of a tow bill. This is a direct-fit replacement for service number 15095335 and other compatible numbers, restoring the performance you depend on.
I remember a 2002 Avalanche that came in on a flatbed. The owner was frustrated because it would crank but not start, and the security light was flashing. He’d already replaced the battery and checked the ignition switch. After connecting my scan tool, I saw a slew of communication error codes pointing to the BCM. The module simply wasn’t talking to the powertrain computer to validate the security key. We installed one of our pre-programmed BCMs, and the truck fired up on the first try. It’s a classic failure on these platforms, and a pre-flashed module is the fastest path to a reliable fix.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution. In my experience, you might also see communication-related DTCs like U0140 or B1001.
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Interior dome lights or dashboard lights flicker or don’t work correctly.
- ✔ The radio or climate controls behave erratically.
- ✔ False warnings on the driver information center, such as “Service 4WD”.
- ✔ Inconsistent horn operation.
Your Guide to a Smooth Installation
Replacing the BCM on these trucks is a job most DIYers can handle with basic tools. This pre-programmed 2002 Tahoe Body Control Module is designed for a direct swap. Just follow these general steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting 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 multiple electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical harnesses. You’ll hear a click as they lock into place.
- Reconnect Power: Reattach the negative battery terminal. Your installation is now complete.
Important Post-Installation Information
While our programming handles the critical vehicle-specific functions, some systems may require a final handshake after installation. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure must be performed using a professional-grade scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position (BPP) Relearn: On some models, a BPP sensor relearn may be needed to ensure correct brake light operation and to prevent issues with the traction control system. This also requires a capable diagnostic tool.
Disclaimer: These procedures are not always required. Always consult a factory service manual or a certified technician if you are unsure.
Will This Fit My Truck?
This 2002 Tahoe Body Control Module is guaranteed to be a direct-fit replacement for the following vehicles, provided the options match. It is compatible with service numbers 15063577, 15081857, 19208544, 15095335, DKAJ, and 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 send my old BCM back?
No. This purchase comes with no core charge. You can keep your original module, which can be helpful for double-checking part numbers.
Is this part difficult to install?
The physical replacement is straightforward for most people with basic tools. It’s located under the steering column and involves unplugging connectors and removing a few bolts. The main benefit here is that our pre-programming eliminates the need for a dealership visit.
What information do you need to program the module?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). We use this to load the correct GM software and settings for your specific vehicle.
What if my airbag light comes on after installation?
This is a possibility. It means the new BCM needs to be electronically introduced to the airbag system (SDM). This is a simple procedure called ‘Setup SDM Primary Key in BCM’ that can be completed by any professional shop with a compatible scan tool.
Will this fix my ‘Service 4WD’ light?
If the ‘Service 4WD’ message is being caused by a communication failure from a bad BCM, then yes, this part will resolve that issue. However, that light can also be triggered by other problems in the 4×4 system, so proper diagnosis is always recommended.