Restore Full Functionality to Your GM Truck or Van
Are you dealing with baffling electrical issues in your 2002 GMC Sierra or a similar GM vehicle? Flickering interior lights, power windows with a mind of their own, or a security system that randomly acts up are classic signs of a failing Body Control Module (BCM). As the central computer for your vehicle’s comfort and convenience features, a faulty BCM can make your daily drive incredibly frustrating. This isn’t just an inconvenience; it can affect vehicle security and safety systems. This replacement Body Control Module is the reliable, straightforward solution you need.
We take the guesswork and high dealership costs out of the repair. Simply provide your vehicle’s VIN after purchase, and our technicians will program this module with the latest official GM software specific to your truck. This ensures seamless integration and corrects many of the inherent software bugs found in the original factory programming. When it arrives, it’s ready for installation, getting you back on the road without needing a tow to the dealer for expensive programming.
A Technician’s Notebook
I remember a 2002 Silverado that came into the shop with a complaint of the radio and power door locks working intermittently. The customer had already replaced the battery and checked all the fuses. Diagnostics showed several U-codes (loss of communication) pointing to the BCM. These early 2000s GM BCMs are notorious for failing due to cold solder joints on the internal circuit board. After years of vibration and temperature cycles, these connections crack, leading to the exact kind of unpredictable electrical gremlins the customer described. Swapping in a properly programmed BCM fixed everything instantly. It’s a common failure I’ve seen hundreds of times.
Common Signs of a Failing BCM
If your vehicle is experiencing these symptoms, a failing BCM is the likely culprit. Replacing your 2002 Sierra Body Control Module can resolve these issues:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or won’t turn on at all.
- ✔ The security or anti-theft system preventing the vehicle from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Incorrect readings on the instrument cluster gauges.
- ✔ Diagnostic Trouble Codes (DTCs) like U0140, B1001, or other B-series and U-series codes.
A Straightforward Guide to Installation
Installing your new BCM is a manageable task for a confident DIYer. While the location varies slightly between trucks and vans, the process is generally similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes to allow all systems to power down completely.
- Locate the BCM: On most trucks like the Sierra and Silverado, the BCM is located under the driver’s side of the dashboard, often near the steering column. On vans like the Astro and Safari, it’s typically behind the center dash trim.
- Remove Trim Panels: Carefully remove any plastic trim or panels necessary to access the module. These usually pop off or are held by a few screws.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New Module: Mount the new, pre-programmed 2002 Sierra Body Control Module in place and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock in.
- Reconnect and Test: Re-install any trim panels you removed. Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, radio, etc.
Important Post-Installation Note: In some cases, additional steps may be required. If your airbag light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. A ‘Brake Pedal Position Relearn’ may also be necessary for proper brake light and traction control operation. Always refer to a service manual for your specific vehicle 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 GM models:
- ✔ 2002-2005 Chevrolet Astro Van
- ✔ 2002-2005 GMC Safari Van
- ✔ 2002-2005 Chevrolet Blazer S10 / GMC Jimmy S15
- ✔ 2002-2004 Chevrolet S10 / GMC Sonoma Pickup
- ✔ 2002 Chevrolet Silverado & GMC Sierra 1500, 2500, 3500, Denali
- ✔ 2002 Chevrolet Avalanche 1500 (4×2)
- ✔ 2002 Chevrolet Suburban & GMC Yukon XL 1500 (4×2), 2500
- ✔ 2002 Chevrolet Tahoe & GMC Yukon (4×2)
- ✔ 2002 Cadillac Escalade (4×2)
Please verify your original part number or consult the detailed fitment list to ensure compatibility.