Restore Your Truck’s Electrical System with a Plug-and-Play Solution
Are you chasing down bizarre electrical gremlins in your GM truck or van? Flickering interior lights, power windows with a mind of their own, a security light that won’t turn off, or door locks that work intermittently 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 of diagnostics, I’ve seen these modules cause symptoms that baffle even experienced mechanics, often leading to wasted time and money replacing perfectly good parts.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and dealer-dependency out of the equation. Simply provide your vehicle’s VIN at checkout, and our technicians will program this BCM with the latest, most stable software updates directly from GM. This means when it arrives at your door, it’s ready to be installed without requiring expensive trips to a dealership for programming. This is the most direct path to getting your truck’s essential features working correctly again, and we’ve built our process around making it as seamless as possible for both professional shops and weekend DIYers.
A Technician’s Notebook: The Ghost in the Machine
A customer brought in his 2002 Sierra 1500, convinced his battery was dying. The dome lights would randomly pulse, the radio would shut off, and the ‘Security’ light was on. He’d already replaced the battery and alternator. After hooking up my scan tool, I saw a slew of communication error codes (U-codes) pointing away from the charging system and straight to the BCM. The internal logic of the original module was failing, sending erratic signals across the data bus. We installed a VIN-programmed 2002 Sierra 1500 BCM, and within 30 minutes, every single phantom issue was gone. It’s a textbook case of how a failing BCM can mimic other problems, and why a direct-fit, programmed module is the definitive fix.
Is Your GM Vehicle Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely culprit:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security system preventing the vehicle from starting (common with GM’s Passlock system).
- ✔ The horn honking randomly or not working when pressed.
- ✔ Warning lights on the dashboard, such as the airbag or brake light, with no apparent cause.
- ✔ Communication issues with scan tools, often showing codes like U1000 or other U-series codes.
- ✔ Wipers operating incorrectly or not parking in the correct position.
A Straightforward Guide to Your BCM Installation
Installing your pre-programmed BCM is a manageable job for a confident DIYer. While specific locations vary slightly, the general process is consistent.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: On most trucks and SUVs like the Sierra, Silverado, and Yukon, the BCM is located under the driver’s side of the dashboard, near the steering column. On vans like the Astro and Safari, it’s typically behind the center dash panel.
- Remove Connectors: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Do not force them.
- Swap the Module: Unbolt or unclip the old BCM from its mounting bracket and remove it. Install the new module in its place.
- Reconnect Everything: Plug the electrical connectors firmly into the new BCM. You should hear a ‘click’ as they lock. Reconnect the negative battery terminal.
- Post-Install Checks: Turn the key to the ‘On’ position and test all body functions (lights, locks, windows). Start the engine. Note that some vehicles may require the additional procedures listed below.
Important Post-Installation Notes: Depending on your vehicle’s specific configuration, one or two final steps might be needed. This is normal. The Brake Pedal Position Relearn may be required for proper brake light and traction control operation. Additionally, if your airbag light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules. Our no-core-charge policy means you can keep your old part.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles:
- AVALANCHE 1500 2002 (4×2)
- ASTRO VAN 2002-2005
- BLAZER S10/JIMMY S15 2002-2005
- ESCALADE 2002 (4×2)
- S10/S15/SONOMA PICKUP 2002-2004
- SAFARI (GMC) VAN 2002-2005
- SIERRA 1500 PICKUP 2002
- SIERRA 2500 PICKUP 2002
- SIERRA 3500 PICKUP 2002
- SIERRA DENALI 2002
- SILVERADO 1500 PICKUP 2002
- SILVERADO 2500 PICKUP 2002
- SILVERADO 3500 PICKUP 2002
- SUBURBAN 1500 2002 (4×2)
- SUBURBAN 2500 2002
- TAHOE 2002 (4×2)
- YUKON 2002 (4×2)
- YUKON XL 1500 2002 (4×2)
- YUKON XL 2500 2002
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. This is the biggest benefit of our service. We program the BCM to your vehicle’s specific VIN before we ship it, so it’s ready for installation right out of the box.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer that acts as the brain for your vehicle’s electronic accessories, like power windows, locks, lights, wipers, security system, and more.
Where is the BCM located on my 2002 Sierra?
On the 2002 GMC Sierra and similar GM trucks, the BCM is typically found under the driver’s side dashboard, often attached to a bracket near the steering column.
What if my airbag light is on after installation?
This can happen occasionally. It means the new BCM needs to be synced with the airbag system’s computer (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ must be performed with a bi-directional scan tool to resolve this.
Is there a core charge or do I have to send my old part back?
No, there is absolutely no core charge. You can keep your original module.
Will this fix my ‘Security’ light issue?
In most cases, yes. A failing BCM is a very common cause of problems with the GM Passlock security system. Our VIN programming ensures the security data matches your vehicle, resolving these issues.