Restore Your GM Truck’s Electrical Systems with a Reliable, Programmed BCM
If you’re dealing with bizarre and frustrating electrical problems in your 2002 Yukon XL 1500 or another compatible GM vehicle, a failing Body Control Module (BCM) is often the culprit. Think of the BCM as the central nervous system for your truck’s body electronics. When it malfunctions, it can cause a cascade of seemingly unrelated issues, from power windows that won’t budge to a security system that has a mind of its own. This isn’t just an inconvenience; it can affect your vehicle’s safety and daily usability. We offer a dependable, plug-and-play solution: a replacement BCM, part number 15081796, programmed specifically to your vehicle’s VIN.
From the Diagnostic Bay: The Case of the Ghostly Gremlins
I remember a customer bringing in his ’02 Sierra 2500, completely fed up. He’d already replaced the driver’s side window motor and the power lock actuator, but the problems persisted intermittently. Sometimes the dome light wouldn’t turn off, and other times the radio would stay on after he’d shut the truck off and opened the door. He was chasing his tail, spending money on parts that weren’t fixing the root cause. After a quick scan, I saw multiple communication codes (U-codes) pointing to the BCM. The module itself was the source of the failure, sending faulty signals to all those other components. We installed a VIN-programmed BCM like this one, and every single one of his “ghostly” electrical gremlins vanished. It’s a classic example of how a single module failure can mimic multiple part failures, and why starting with the right diagnosis is key.
Is Your GM Truck or SUV Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution.
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system light flashing, preventing the engine from starting (Passlock issues).
- ✔ Inaccurate or dead gauges on the instrument cluster.
- ✔ The radio or other accessories not turning off when the door is opened.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U1000, U1016, or various B-codes.
A Straightforward Guide to Your BCM Installation
For most of the trucks and SUVs this module fits, the BCM is located under the driver’s side of the dashboard, near the steering column. This process is manageable for a DIYer with basic tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting any electrical work.
- Access the Module: You may need to remove the lower dash panel or knee bolster to gain clear access to the BCM. It’s typically a black plastic box with several large multi-pin connectors.
- Confirm the Part Number: Before removing, check the part number on your original module to ensure it matches one of the compatible numbers listed (e.g., 15081796, 15063578).
- Swap the Connectors: Carefully unplug all electrical connectors from the old BCM. They have locking tabs that need to be depressed. Then, remove any bolts or clips holding the module in place.
- Install the New BCM: Secure the new, pre-programmed BCM in the same location and plug all connectors in firmly until they click.
- Final Steps & Testing: Re-install any panels you removed and reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions: windows, locks, lights, wipers, etc.
Important Post-Installation Information
Because this BCM is pre-programmed to your VIN, you avoid a costly trip to the dealership for software flashing. However, depending on your vehicle’s specific configuration, a couple of simple relearn procedures may be needed:
- Airbag System Sync: In some cases, the airbag (SRS) light may illuminate after installation. This is because the new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
- Brake Pedal Position Relearn: To ensure correct brake light operation and traction control function, a brake pedal position sensor relearn might be necessary. This can also be performed with a capable diagnostic tool.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step.
Verified Fitment for Your GM Truck or Van
This Body Control Module is a direct replacement for part number 15081796 and is interchangeable with part numbers 15063578, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles:
Avalanche 1500: 2002 (4×2, Under Steering Column)
Blazer S10 / Jimmy S15: 2002-2005 (Center Dash)
Escalade: 2002 (4×2, Under Steering Column)
S10 / S15 / Sonoma Pickup: 2002-2004 (Center Dash)
Safari Van (GMC): 2002-2005 (Center Dash)
Sierra 1500 / 2500 / 3500 / Denali: 2002 (Under Steering Column)
Silverado 1500 / 2500 / 3500: 2002 (Under Steering Column)
Suburban 1500 / 2500: 2002 (Under Steering Column)
Tahoe: 2002 (4×2, Under Steering Column)
Yukon / Yukon XL 1500 / Yukon XL 2500: 2002 (Under Steering Column)
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. We use this information to load the latest GM-certified software onto the BCM, ensuring it matches your vehicle’s specific options and features for a seamless installation.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module, which saves you the time and expense of shipping a core back.
Will this fix my ‘Security’ light and no-start problem?
Yes, a faulty BCM is a very common cause of issues with the GM Passlock security system. A new, correctly programmed BCM will resolve these security-related starting problems.
What tools are required for the installation?
You will typically only need basic hand tools, such as a socket set and a screwdriver or panel removal tool to access the BCM under the dashboard. No special programming tools are required on your end.
What if the airbag light comes on after I install it?
This can happen occasionally and requires a simple sync procedure between the new BCM and the airbag module (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ function in a few minutes to turn the light off.