Is your GM truck or van experiencing bizarre electrical problems?
If your power windows have a mind of their own, the security light is constantly on, or your gauges are acting erratically, you’re likely dealing with a failing Body Control Module (BCM). The BCM is the central electronic hub for your vehicle’s body functions, and when it fails, it can cause a cascade of frustrating and hard-to-diagnose issues. This isn’t just an inconvenience; a faulty BCM can prevent your vehicle from starting, leaving you stranded.
From the Diagnostic Bay
We had a 2002 Silverado 2500 towed in that was a classic no-crank, no-start. The owner had already replaced the battery and the starter to no avail. The security light was illuminated on the dash, which was the key clue. After a quick scan, we confirmed a communication failure with the BCM. The original module was preventing the Passlock security system from authorizing the ignition. We installed a VIN-programmed BCM, and the truck fired right up. It’s a common story for these vehicles, where the BCM is the hidden culprit behind what seems like a mechanical failure.
Common Symptoms of a Failing BCM
- ✔ Power windows, door locks, or mirrors not working or operating intermittently.
- ✔ The anti-theft or “Security” light is on, possibly causing a no-start condition.
- ✔ Instrument cluster gauges (speedometer, tachometer) behaving erratically or not working at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ HVAC and climate control functions are unresponsive.
- ✔ Diagnostic trouble codes (DTCs) related to U-codes (communication) or B-codes (body).
- ✔ Horn honking unexpectedly or not working.
The Direct-Fit Solution: A Programmed 2002 Suburban 2500 BCM
Don’t let a faulty module keep your truck off the road. This replacement Body Control Module is a direct-fit solution for your 2002 Chevrolet Suburban 2500 and a wide range of other GM trucks and vans. The most significant benefit is our complimentary programming service. Simply provide your vehicle’s VIN during checkout, and our technicians will flash the module with the latest GM software specific to your vehicle’s configuration. This means no expensive trips to the dealership for programming. It arrives at your door ready for installation.
This module is a reliable replacement for multiple part numbers, including 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. Check the fitment list to confirm compatibility with your exact model.
Installation and Post-Install Procedures
Installation is straightforward for those with some DIY experience. The BCM is typically located under the steering column or behind the center dash. After installing your new module, a couple of additional steps may be required:
- Airbag System Sync: If your airbag warning light turns on after installation, a simple “Setup SDM Primary Key in BCM” procedure is needed. This syncs the new BCM with the airbag system and requires a professional-grade scan tool.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be necessary to ensure your brake lights and traction control system function correctly.
There is no core charge for this part. You can keep your old module without needing to send it back.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, the security system, wipers, and HVAC controls.
Is this BCM ready to install when it arrives?
Yes! We program the module to your vehicle’s specific VIN before shipping. This makes the installation process much simpler, though some vehicles may require a post-install relearn procedure for the airbag or brake pedal position sensor as detailed above.
Where is the BCM located on my 2002 GM truck or van?
On most compatible models like the Silverado, Sierra, Suburban, and Tahoe, the BCM is located under the driver’s side dash, near the steering column. On vans like the Astro and Safari, it’s often found in the center dash area.
What happens if I forget to provide my VIN?
Providing your VIN is mandatory for this part. We cannot program and ship the module without it, as the programming is essential for the BCM to function correctly in your vehicle. We will contact you if the VIN is missing from your order.
Will this fix the “Security” light on my dash?
A faulty BCM is the most common cause of a persistent “Security” light and related no-start issues on these GM vehicles. While this module will resolve the problem in most cases, you should always confirm the diagnosis.