Restore Full Electrical Function to Your GM Vehicle
Are you battling bizarre electrical problems in your 2002 GM truck or van? Flickering lights, malfunctioning power windows and locks, a security system that acts on its own, or an intermittent no-start condition can often be traced back to a single component: a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a wide range of frustrating and difficult-to-diagnose issues. This replacement BCM is the definitive solution to restore your vehicle’s proper operation and reliability.
We had a 2002 Sierra 2500 in the shop that was driving the owner crazy. It would randomly refuse to crank. He had already replaced the battery, starter, and ignition switch. After checking all the primary circuits, we focused on the BCM. We noticed that when the no-crank condition occurred, the security light was flashing. A quick scan confirmed the BCM was failing to recognize the key’s security chip. Swapping in a correctly programmed BCM fixed the problem instantly. It’s a classic example of how a faulty BCM can mimic other, more expensive component failures.
Common Symptoms of a Failing GM BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system light stays on, or the alarm goes off randomly.
- ✔ Instrument cluster gauges behaving erratically or going dead.
- ✔ Intermittent no-start or no-crank conditions.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Communication loss codes with other vehicle modules (U-codes).
Solving Issues in Your 2002 Silverado 3500 BCM and More
This isn’t just a part; it’s a complete, ready-to-install solution. We take the guesswork and hassle out of the repair process. Simply provide us with your vehicle’s VIN during checkout, and our technicians will program the module with the latest GM software updates specific to your truck or van. This ensures seamless integration and proper function right out of the box. This module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU, and fits a wide range of GM vehicles including the Silverado, Sierra, Tahoe, Suburban, Astro, Blazer, and more.
Post-Installation Requirements
While this module is programmed for a straightforward installation, some vehicles may require additional steps to ensure all systems are synchronized. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light operation and to satisfy the traction control system.
Always consult a factory service manual or a qualified technician for vehicle-specific procedures.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related electronic functions. This includes power windows, locks, lights, security system, wipers, and instrument cluster warnings.
Do I need to get this BCM programmed?
No. We handle all the programming for you before we ship the part. Just provide your vehicle’s VIN at checkout, and it will arrive ready to install with the latest GM software for your specific vehicle.
How do I find my original part number?
Your original BCM’s part number is printed on a sticker on the module itself. On most GM trucks and SUVs from this era, it’s located under the steering column. For vans like the Astro and Safari, it’s typically behind the center of the dash.
What if my airbag light is on after I install the new BCM?
This is a normal possibility. It means the new BCM needs to be electronically introduced to the airbag system (SDM). A repair shop with a professional-grade scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve it.
Is there a core charge?
No, there is no core charge for this part. You can keep your old module, so there’s no need to worry about return shipping.