Restore Full Electrical Control to Your GM Truck
Are you battling frustrating electrical issues in your GMC Sierra or another GM vehicle? Flickering lights, a dead instrument cluster, or power windows with a mind of their own are more than just annoyances—they’re often signs of a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause a cascade of problems. This OEM-quality replacement, part number 15284816, is the reliable, plug-and-play solution you need. We pre-program it to your vehicle’s specific VIN, ensuring it communicates flawlessly with your truck’s systems right out of the box, eliminating the need for an expensive trip to the dealership.
Case Study: The Ghost in the Machine
I once had a 2008 Sierra 1500 in my bay that was driving the owner crazy. The radio would cut out, the dome light would stay on, and occasionally the truck wouldn’t start, flashing a security light. He’d already replaced the battery and checked the alternator. After hooking up my scanner, I saw a dozen communication codes (U-codes) pointing to the BCM. A quick voltage drop test on the main BCM ground confirmed the culprit: internal failure was causing intermittent grounding issues. Installing a VIN-programmed 2007-2011 Sierra 1500 BCM like this one solved every single issue in under 10 minutes. It’s a classic failure mode on these GMT900 platforms.
Is Your Sierra Exhibiting These Electrical Faults?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement. Over my 20 years in diagnostics, these are the most common symptoms I’ve seen:
- ✔ Electrical components working intermittently (power locks, windows, wipers).
- ✔ HVAC system failures, such as the blower motor not working or being stuck on one speed.
- ✔ The security system light is illuminated, and the engine may stall or fail to start.
- ✔ An airbag warning light on the dash, often accompanied by DTC B1001 (Setup SDM Primary Key in BCM).
- ✔ Headlights, taillights, or interior lights not functioning correctly.
- ✔ A battery that drains overnight due to the BCM not letting other modules go to ‘sleep’.
Your 5-Minute BCM Installation Guide
Getting your truck back to 100% is easier than you think. This is a job most DIYers can tackle with basic hand tools in their own driveway. The BCM is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronics.
- Locate the BCM: On your Sierra, it’s under the driver’s side dash. You may need to remove a lower dash panel for easier access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs, so be gentle. Once disconnected, unclip or unbolt the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket 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. Turn the key to the ‘On’ position and test all functions: lights, locks, windows, wipers, and the HVAC system.
Post-Installation Note: In some cases, particularly if you had an airbag light, a ‘Setup SDM Primary Key in BCM’ procedure may be needed using a bi-directional scan tool. Also, a ‘Brake Pedal Position Relearn’ might be required. There is no core charge, so you can keep your old part without any hassle.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 15284816 and interchanges with several other part numbers including 25844480, 25835966, 15263363, 15878753, and more. It provides a guaranteed fit for a wide range of popular GM models. While this is a perfect 2007-2011 Sierra 1500 BCM, it also fits many others:
Note: Please verify your specific model and year. Some 2007 models require the ‘new style’ (smooth door skin) designation.
Frequently Asked Questions
Do I need to get this programmed by a dealer?
No. We pre-program this module to your vehicle’s VIN before shipping. It arrives ready for a plug-and-play installation, saving you time and money.
What tools are required for installation?
Installation typically only requires basic hand tools, such as a socket set or nut driver to remove the lower dash panel and possibly the module’s mounting bolts. No special electronic tools are needed for the physical swap.
My airbag light is on. Will this fix it?
This module will often resolve communication issues causing the airbag light (like DTC B1001). However, after installation, you may need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function to sync the new BCM with the airbag system and clear the light.
Is this a new or used part?
This is an OEM-quality replacement part, tested to meet or exceed original specifications for performance and reliability. It comes with a one-year warranty for your peace of mind.
What does ‘no core charge’ mean?
It means you don’t have to send your old, faulty BCM back to us. This saves you the hassle and cost of return shipping and eliminates any core deposit fees.