Restore Your Vehicle’s Electrical Brain and End the Frustration
Are you chasing electrical gremlins in your GM truck, van, or SUV? Flickering dashboard lights, power windows with a mind of their own, a security system that prevents your engine from starting, or interior lights that won’t turn off can all point to one culprit: a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a bad BCM can turn a reliable vehicle into a source of daily headaches. It’s the central nervous system for your vehicle’s comfort and convenience features, and when it goes, chaos ensues.
This isn’t just another part. This is a complete solution. We are offering a replacement Body Control Module that is fully programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This means we load the latest, most stable software from GM directly onto the module. You get a part that is ready for installation, saving you the time, expense, and hassle of a trip to the dealership for programming. This is the smart, efficient fix for both seasoned mechanics and first-time DIYers.
Case Study: A Tricky Diagnosis
A customer’s 2002 GMC Sierra came into the shop last month with a bizarre list of symptoms. The radio would turn on and off randomly, the driver’s side power lock was dead, and occasionally, the truck wouldn’t start, just a click. The battery and alternator tested fine. After checking the grounds, I connected my scan tool and found a slew of communication error codes originating from the BCM. Instead of a costly diagnostic path, we swapped in a pre-programmed BCM. The total time on my lift was under an hour, and every single electrical issue was resolved. The customer saved hundreds compared to a dealer visit and was back on the road the same day. This is the power of a direct-fit, programmed solution.
Is Your GM Truck or SUV Showing These Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely your solution:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome or dashboard lights staying on or not working at all.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Wipers operating intermittently or at the wrong speed.
- ✔ False warnings on the driver information center (e.g., “Service 4WD”).
- ✔ Communication error codes (U-codes) stored in the system.
A Straightforward Guide to BCM Installation
Replacing the BCM is a manageable job for someone with basic tools. This programmed GM BCM simplifies the process significantly. Follow these general steps for a successful installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On these GM models, the BCM is typically found in one of two places: behind the center of the dashboard (often near the radio) or under the driver’s side of the dashboard, near the steering column.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in place and securely reconnect all electrical harnesses. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Final Relearn Procedures: This step is critical. After installation, your vehicle requires a couple of key procedures to ensure all systems communicate correctly. This often requires a bi-directional scan tool.
- Airbag System Reset: To clear the airbag warning light, you must perform the ‘Setup SDM Primary Key in BCM’ procedure. This ensures the new BCM and the airbag system are properly synced for safety.
- Brake Pedal Position Sensor (BPPS) Relearn: Some vehicles will require a recalibration of the brake pedal position sensor to ensure accurate brake light operation and stability control function.
Note: If you are not comfortable with these final steps or do not have the required diagnostic tools, we strongly recommend seeking assistance from a qualified professional technician.
Verified Fitment For These GM Models
This module is a direct replacement for several part numbers, including 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. Please verify your part number or use the compatibility list below. This part is confirmed to fit the following vehicles:
- Cadillac Escalade (4×2): 2002
- Chevrolet Avalanche 1500 (4×2): 2002
- Chevrolet Blazer S10 / GMC Jimmy S15: 2002-2005
- Chevrolet S10 / GMC Sonoma: 2002-2004
- Chevrolet Silverado & GMC Sierra 1500/2500/3500 Pickups: 2002
- Chevrolet Suburban & GMC Yukon XL 1500/2500: 2002
- Chevrolet Tahoe & GMC Yukon (4×2): 2002
- GMC Sierra Denali: 2002
- Chevrolet Astro Van & GMC Safari Van: 2002-2005
Frequently Asked Questions
Why do you need my VIN to sell me this programmed GM BCM?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and vehicle-specific options that your truck or SUV left the factory with. This ensures seamless integration and proper function of all systems, from power locks to the engine’s anti-theft system, and provides the latest updates from GM.
Is this part truly plug-and-play?
It is ‘plug-in and start’, but not entirely ‘plug-and-play’. The module is programmed to start your vehicle, but as noted in the installation guide, critical post-installation procedures like the airbag system reset (‘Setup SDM Primary Key’) and potentially a brake pedal sensor relearn are required using a professional scan tool for full and safe functionality.
Will this fix my ‘Security’ light and no-start problem?
In a vast majority of cases, yes. The BCM is a core component of the GM Passlock and Passkey anti-theft systems. A faulty BCM is a very common reason for a persistent security light and the resulting no-start condition. This programmed module is designed to resolve that issue.
Where is the BCM located on my 2002 Silverado or Sierra?
For the 2002 full-size trucks and SUVs (Silverado, Sierra, Tahoe, Yukon, etc.), the BCM is located under the driver’s side dashboard, to the left of the steering column. For vans (Astro, Safari) and smaller SUVs/trucks (Blazer, S10), it is typically located behind the center of the dash.
What happens if I don’t perform the airbag system reset?
If the ‘Setup SDM Primary Key in BCM’ procedure is not completed, the airbag warning light will remain on, and more importantly, the airbag system (SRS) will be inoperative. This is a critical safety step that must not be skipped.