Restore Your GM Truck’s Electrical System with a Plug-and-Play Solution
If you’re dealing with bizarre electrical issues in your 2002 Avalanche or another compatible GM vehicle, you know the frustration. Lights that flicker for no reason, power windows with a mind of their own, or a security light that prevents your truck from starting—these are classic signs of a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it goes, it can create a cascade of confusing and annoying problems. Stop chasing electrical gremlins and get the definitive fix. This replacement BCM is the reliable, straightforward solution you need to get your vehicle back to normal.
A Technician’s Notebook: The BCM That Mimicked a Bad Alternator
A customer brought in a 2002 Sierra 2500 with a complaint that was all over the map. The battery light would flash intermittently, the radio would cut out, and sometimes the gauges would sweep and die. He had already replaced the battery and the alternator, spending hundreds of dollars with no success. After hooking up my scan tool, I saw a dozen communication loss codes (U-codes) pointing to the BCM. The module’s internal voltage regulation was failing, causing it to send erratic signals that made other components seem faulty. We installed a VIN-programmed BCM, and every single issue disappeared. It’s a perfect example of how a faulty 2002 Avalanche BCM can send you on a wild goose chase, but the right diagnosis and part saves time and money.
Is Your Vehicle Showing These Symptoms?
- ✔ Erratic or non-functional power windows and door locks.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ Instrument cluster gauges behaving strangely or going dead.
- ✔ The radio or climate controls function intermittently.
- ✔ Communication error codes stored, such as U1000, U1016, or U1041.
- ✔ False warnings appearing on the driver information center (DIC).
This isn’t just a replacement part; it’s a complete service. We take the hassle out of the repair by programming the module specifically for your vehicle using the VIN you provide after purchase. It arrives loaded with the latest GM software updates, ensuring optimal performance and compatibility. This eliminates the need for expensive dealership programming or specialized scan tools, making it a perfect solution for both seasoned mechanics and dedicated DIYers.
Your Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most trucks and SUVs (like the Avalanche, Silverado, Tahoe), 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 trim.
- ✔ Disconnect and Remove: Carefully 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 BCM: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, and wipers—to confirm the repair was successful.
Verified Vehicle Compatibility
This Body Control Module is a direct-fit replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles:
ASTRO 02-05 Body Control (BCM); (center dash)
BLAZER S10/JIMMY S15 02-05 Body Control (BCM); (center dash)
ESCALADE 02 Body Control (BCM); (under steering column), 4×2
S10/S15/SONOMA 02-04 Body Control (BCM); (center dash)
SAFARI (GMC) 02-05 Body Control (BCM); (center dash)
SIERRA 1500/2500/3500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA DENALI 02 Body Control (BCM); (under steering column)
SILVERADO 1500/2500/3500 PICKUP 02 Body Control (BCM); (under steering column)
SUBURBAN 1500/2500 02 Body Control (BCM); (under steering column), 4×2
TAHOE 02 Body Control (BCM); (under steering column), 4×2
YUKON 02 Body Control (BCM); (under steering column), 4×2
YUKON XL 1500/2500 02 Body Control (BCM); (under steering column), 4×2
Please verify the part number on your original module to ensure a perfect match.
Frequently Asked Questions
Do I need to do any programming myself?
Do I need to do any programming myself?
No. This is the biggest benefit of our service. We program the module to your vehicle’s VIN before we ship it. It arrives ready for installation, with no need for a trip to the dealer or expensive scan tools.
Where do I find my VIN and how do I provide it?
Your 17-digit Vehicle Identification Number (VIN) is located on the driver’s side of the dashboard (visible through the windshield) and on your vehicle’s registration and insurance documents. After you complete your purchase, you will need to send us your VIN so we can perform the programming.
What if my airbag light turns on after installation?
In some cases, the new BCM may need to be synced with the airbag system. If the airbag light is on, a procedure called ‘Setup SDM Primary Key in BCM’ will need to be performed by a shop with a professional-grade diagnostic tool. This is a simple sync procedure, not full programming.
Do I need to return my old BCM?
No. There is absolutely no core charge for this part. You can keep your old module, which can be helpful if you ever need to reference its original part number.
Is this the right fix for my 2002 Avalanche BCM problems?
If your vehicle is on the compatibility list and you’re experiencing the common symptoms we’ve described, this module is the most likely and effective solution. It addresses the root cause of these widespread electrical failures in early 2000s GM trucks and SUVs.