Tired of Your Truck’s Electrical Gremlins?
Is your 2002 GMC Yukon, or another GM truck or SUV, starting to feel haunted? One minute the power locks work, the next they don’t. The security light flashes for no reason, or worse, the vehicle refuses to start. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times. The culprit is almost always a failing Body Control Module (BCM), the central hub for your vehicle’s body electronics. When it goes, it creates a cascade of frustrating, intermittent problems that can be a nightmare to diagnose.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take a reliable BCM, load it with the latest official GM software, and program it specifically to your vehicle’s VIN before it ever leaves our facility. This means you get a part that is truly ready for installation, eliminating the need for an expensive trip to the dealership for programming. You get a permanent fix for those electrical headaches and restore your vehicle’s proper function.
A Technician’s Notebook: The Case of the Random No-Start
A customer brought in his 2002 Sierra 2500, a work truck he depended on daily. The complaint was maddening: sometimes it would start perfectly, other times it was completely dead. The battery was new, the starter was fine. He’d already spent a small fortune at another shop that couldn’t find the issue. After hooking up my scan tool, I noticed communication dropouts with the BCM. On these GMT800 platforms, the BCM is a critical part of the Passlock security system. I’ve seen the internal circuit boards develop microscopic cracks in the solder joints from years of vibration and temperature cycles, causing these exact intermittent failures. We swapped in a VIN-programmed BCM, and the truck fired up every single time. It’s a classic failure mode for these modules.
Common Signs of a Failing BCM
If you’re experiencing any of the following, a faulty BCM is the likely cause. In my shop, I’ve seen these symptoms point to BCM failure in over 90% of cases on these GM models. Common diagnostic trouble codes (DTCs) include U0140, U0155, B1000, and B1001.
- ✔ Power windows, mirrors, or door locks working intermittently or not at all.
- ✔ The anti-theft or security light stays on, preventing the engine from starting.
- ✔ Instrument cluster gauges behaving erratically or going dark.
- ✔ Interior dome lights or exterior lights staying on or not turning on.
- ✔ Radio or climate control systems malfunctioning.
- ✔ False warnings appearing on the driver information center.
Your Straightforward BCM Installation Guide
Installing your pre-programmed BCM is a manageable job for a DIYer with basic tools. The key is knowing where to look. On full-size trucks and SUVs (Yukon, Tahoe, Silverado, etc.), it’s typically under the driver’s side dash, near the steering column. On vans and S-series trucks (Astro, Blazer), it’s often behind the center dash panel.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes to allow all systems to discharge.
- Locate the BCM: Remove any lower dash panels necessary to access the module. It’s a black plastic box with several large multi-pin electrical connectors.
- Disconnect and Remove: Carefully unplug all 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 the same location. Securely plug in all the electrical connectors, ensuring they click into place.
- Power Up: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting) and check for proper function of lights, locks, and windows.
Important Post-Installation Steps
While our programming handles the heavy lifting, some vehicle systems may need to be re-synced after the new BCM is installed. If the airbag light is on, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. Additionally, some models may require a ‘Brake Pedal Position Relearn’ to ensure correct brake light and traction control operation. Always consult a service manual for your specific model if you are unsure.
Will This Fit My Vehicle?
This module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles and options:
Chevrolet: Tahoe (02), Suburban (02), Silverado 1500/2500/3500 (02), Avalanche 1500 (02), Blazer S10 (02-05), S10 Pickup (02-04), Astro Van (02-05)
Cadillac: Escalade (02)
Note: Please verify your original part number or consult the detailed fitment list if unsure. VIN-programming ensures compatibility for your specific options.
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply reply to the order confirmation email with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information.
Is any additional programming required after installation?
No, this 2002 Yukon BCM arrives fully programmed to your VIN. In some cases, as noted above, minor relearn procedures for the airbag or brake systems may be needed, which can be done with a compatible scan tool.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your old module, which is helpful if you ever need to reference the original part number sticker.
What if my original part number is not 19208537?
This module is a direct, updated replacement for several part numbers, including 15063578, 15081796, and 15095334. As long as your vehicle is on the compatibility list, this part will work correctly once programmed to your VIN.
Will this fix my no-start security issue?
Yes, in most cases. A faulty BCM is a very common cause of Passlock security system failures on these GM vehicles. Our VIN-specific programming correctly matches the new module to your vehicle’s security system, resolving these issues.