End the Electrical Gremlins in Your GM Truck or SUV
Are you chasing bizarre electrical issues in your 2002 GMC Yukon or another GM vehicle? One minute the power locks work, the next they don’t. The security light flashes, preventing your truck from starting. Maybe the interior lights have a mind of their own. As a technician with over two decades of experience, I’ve seen these exact frustrations hundreds of times. More often than not, the culprit is a failing Body Control Module (BCM)—the electronic nerve center for all your vehicle’s comfort and convenience features.
Instead of paying for expensive diagnostic time and dealership programming, get the definitive solution. This is a direct-fit replacement BCM, and the best part is, we handle the programming for you. Simply provide your vehicle’s VIN at checkout, and we’ll flash the module with the latest GM software updates specific to your truck or van. It arrives at your door ready for installation, saving you time, money, and a trip to the dealer.
A Technician’s Notebook
A customer brought in his 2002 Chevy Tahoe with a classic case of BCM failure. The dash lights would flicker randomly, the radio would cut out, and sometimes the truck just wouldn’t start, flashing the security light. He’d already replaced the battery and checked the alternator. When I connected my scan tool, it was throwing a U1000 code—Loss of Communication with the BCM. This is a dead giveaway. We swapped in a VIN-programmed BCM, performed the security relearn, and all the spooky electrical issues vanished instantly. It’s a common failure point on these platforms, but thankfully, it’s a straightforward fix with the right part.
Is Your GM Vehicle Showing These Signs?
A faulty BCM can cause a wide range of symptoms that seem unrelated. If you’re experiencing any of the following, your Body Control Module is the likely cause:
- ✔ Power windows, mirrors, or door locks working intermittently or not at all.
- ✔ The anti-theft or security light is illuminated, causing a no-start condition.
- ✔ Interior dome lights or dashboard lights flicker or stay on.
- ✔ The radio, climate controls, or other dash functions are inoperative.
- ✔ Your scan tool shows communication error codes (U-codes) like U1000, U0140, or various body-related codes (B-codes).
- ✔ Key fobs are not responding.
Your Straightforward BCM Installation Guide
Replacing the BCM is a job most DIYers can handle with basic tools. The location varies slightly between trucks/SUVs and vans, but the process is similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On most trucks and SUVs (Yukon, Tahoe, Silverado, Sierra), the BCM is located under the driver’s side of the dashboard, near the steering column. On vans (Astro, Safari), it’s typically behind the center dash area.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM and remove it from the vehicle.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Post-Installation Procedures: This is a critical step. You will need to perform a security relearn procedure (often called a Passlock relearn) to sync the new BCM with your vehicle’s keys. This procedure can typically be done without special tools and instructions are widely available online for your specific model.
Important Final Steps: Airbag & Brake System Resets
After installing your new 2002 Yukon BCM and performing the security relearn, two final checks are essential for safety and proper function. These steps typically require a professional bi-directional scan tool.
- Airbag System (SRS): If the airbag warning light is on, you must perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes communication between the new BCM and the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position: Some vehicles may require a brake pedal position sensor recalibration to ensure the brake lights and ABS system function correctly.
If you are not equipped to perform these procedures, a qualified local mechanic can complete them for you quickly.
Verified Fitment For These GM Models
This BCM is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles:
- 2002 Cadillac Escalade (4×2)
- 2002 Chevrolet Avalanche 1500 (4×2)
- 2002-2005 Chevrolet Blazer S10
- 2002-2005 Chevrolet Astro Van
- 2002-2004 Chevrolet S10 / Sonoma Pickup
- 2002 Chevrolet Silverado 1500, 2500, 3500 Pickup
- 2002 Chevrolet Suburban 1500 (4×2), 2500
- 2002 Chevrolet Tahoe (4×2)
- 2002-2005 GMC Jimmy S15
- 2002-2005 GMC Safari Van
- 2002 GMC Sierra 1500, 2500, 3500, Denali Pickup
- 2002 GMC Yukon (4×2)
- 2002 GMC Yukon XL 1500 (4×2), 2500
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN (Vehicle Identification Number) allows us to program the BCM with the exact software and settings your vehicle had from the factory, including any specific options. This ensures all features work correctly right out of the box.
Is this installation truly plug-and-play?
It’s very close. The module is a direct physical and electrical fit, and the core programming is done for you. However, you will need to perform a security relearn procedure after installation, which syncs the module to your keys. This is a mandatory step for all BCM replacements on these vehicles.
What does a Body Control Module actually do?
The BCM is a computer that manages most of the non-engine related electronic systems in your vehicle. This includes power windows, locks, seats, interior and exterior lighting, the security system, wipers, and HVAC blower controls.
Will this fix my flashing security light and no-start problem?
In the vast majority of cases, yes. A flashing security light is the most common symptom of a BCM failure or a communication issue between the BCM and the key’s security chip. Replacing the BCM and performing the relearn procedure typically resolves this issue.
What tools are needed for the post-installation procedures?
The security relearn can usually be done without any special tools—just your ignition key and about 30 minutes of time. However, to clear an airbag light or recalibrate the brake pedal sensor, you or your mechanic will need a professional-grade bi-directional scan tool.
How can I confirm my original part number?
The part number is printed on a sticker on your original BCM. Checking this number is the best way to guarantee compatibility, though this module replaces several common part numbers for these vehicles.