Are you dealing with frustrating electrical gremlins in your GM truck or SUV? Flickering lights, malfunctioning power windows, erratic door locks, or a security light that won’t turn off are common signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a wide range of confusing and unpredictable problems. This replacement BCM is the definitive solution to restore full functionality and reliability to your vehicle.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork out of the repair by pre-programming this module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures seamless integration with your truck’s existing systems, saving you a costly trip to the dealership for programming. Simply provide your VIN after purchase, and we’ll handle the rest.
We had a 2002 Sierra 2500 come in that was driving the owner crazy. The dome light would stay on, the radio would randomly shut off, and the power door locks had a mind of their own. He’d already replaced the battery and checked all the fuses. After connecting our scan tool, we saw multiple communication errors pointing straight to the BCM. We installed a VIN-programmed BCM just like this one, and within 20 minutes, every single electrical issue was gone. The customer was thrilled to have his truck back to normal without a massive dealership bill.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security or anti-theft light stays illuminated, preventing the vehicle from starting.
- ✔ Erratic or non-functional dashboard gauges.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Problems with the heating and A/C blower motor controls.
Why Choose Our 2002 Silverado 3500 BCM?
This module is a direct replacement for a wide range of 2002-2005 GM vehicles, including the Silverado, Sierra, Tahoe, Yukon, Astro, and more. It is a reliable, cost-effective alternative to expensive dealership parts. Because we flash it with the latest GM software updates using your VIN, you’re getting a component that’s perfectly matched to your vehicle’s specific options and configuration. Installation is straightforward, and with our pre-programming service, you can avoid the complex and expensive procedures required at a repair shop. This is the fastest way to solve your electrical issues and get back on the road with confidence.
This module is a direct fit for the following part numbers: 15063578, 15081796, 15095334, 19208537, DKAK, DPNU.
Post-Installation Information
While this module is plug-and-play, some vehicles may require additional steps after installation. If your airbag warning light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the systems. Additionally, a Brake Pedal Position sensor relearn may be necessary on some models to ensure proper function of the brake lights and traction control. Always consult a factory service manual for vehicle-specific instructions.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer in your vehicle that controls and monitors various electronic accessories, such as power windows, locks, lights, wipers, and the security system. It acts as the central hub for these body-related functions.
How do I know if my BCM is the problem?
Common signs include multiple, unrelated electrical issues happening at once. For example, if your power windows, radio, and interior lights are all acting up, the BCM is a likely culprit. A diagnostic scan by a professional can confirm the failure.
Is this BCM difficult to install?
On most compatible models like the 2002 Silverado 3500, the BCM is located under the steering column and is accessible with basic hand tools. Since we pre-program it, the most difficult part of the job is already done for you.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
What do I need to do after I place my order?
After you complete your purchase, you must provide us with your 17-digit VIN. We cannot ship your order until we receive your VIN, as we need it to program the module specifically for your vehicle.
Will this fix my ‘Service 4WD’ message?
While the BCM communicates with many modules, a ‘Service 4WD’ message is typically caused by the Transfer Case Control Module (TCCM) or a faulty encoder motor or switch, not the BCM.