Restore Full Control Over Your Truck’s Electronics
If your 2002-2006 Chevrolet Avalanche 2500 is acting possessed—with flickering lights, a dead climate control panel, or power windows with a mind of their own—the root cause is often a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can create a cascade of frustrating and seemingly unrelated problems. This replacement module, part number 15194170, is the definitive solution. We pre-program it to your truck’s specific VIN, ensuring it works perfectly right out of the box, with no expensive trip to the dealership for coding.
Case Study: A Tricky Diagnosis
I remember a 2005 Sierra 2500 (which shares this exact BCM platform with the Avalanche) that came into my shop. The owner was at his wit’s end. His dash lights would flicker randomly, the radio would cut out, and the HVAC blower was completely dead. He’d already replaced the battery and alternator with no luck. After connecting my scanner, I saw a dozen communication codes pointing to the BCM. A failing internal circuit was causing a data storm on the network, disrupting everything. We installed one of our VIN-programmed modules, and in less than 10 minutes, every single issue was gone. It’s a classic example of how one single component can cause widespread electrical chaos.
Is Your Avalanche 2500 Showing These Electrical Gremlins?
A failing BCM doesn’t always trigger a check engine light, making it tricky to diagnose. Over my 20 years in the business, these are the most common symptoms I’ve seen pointing directly to a bad 2002-2006 Avalanche 2500 BCM:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC controls that don’t respond or a blower motor that won’t turn on.
- ✔ The security light stays on, or the truck experiences a no-start condition.
- ✔ Erratic interior or exterior lights (flickering, staying on, or not working at all).
- ✔ An illuminated airbag light, often with a Diagnostic Trouble Code (DTC) like B1001.
- ✔ False warnings on the driver information center (DIC).
Your 5-Minute Path to a Fully Functional Truck
You don’t need to be a professional mechanic to perform this replacement. The plug-and-play design makes it one of the easier electronic fixes you can do.
- Safety First: Always disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the system.
- Locate the BCM: On the Avalanche 2500, the BCM is located under the driver’s side of the dashboard, just to the left of the steering column. It’s typically held in by simple clips or a couple of small bolts.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs, so be gentle. Remove the old module and clip the new, pre-programmed one into place.
- Reconnect and Test: Plug the connectors firmly into your new BCM. Reconnect the battery terminal. Start the truck and test all the functions: lights, wipers, locks, windows, and HVAC to confirm the repair.
Important Post-Installation Notes
While our VIN programming handles the vast majority of functions, some vehicle systems require an on-vehicle handshake. If your airbag light is on after installation, a technician will need to perform a “Setup SDM Primary Key in BCM” procedure with a capable scan tool. In some cases, a Brake Pedal Position relearn may also be needed. These are standard procedures for this type of repair.
Verified Fitment For These GM Trucks & SUVs
This BCM is a direct replacement for part number 15194170 and other interchangeable numbers. It is guaranteed to fit the following vehicles (among others):
- ✔ 2002-2006 Chevrolet Avalanche 2500
- ✔ 2003-2006 Chevrolet Avalanche 1500
- ✔ 2003-2007 Chevrolet Silverado & GMC Sierra 1500/2500/3500 (Crew Cab)
- ✔ 2003-2006 Chevrolet Suburban, Tahoe & GMC Yukon/Yukon XL
- ✔ 2003-2006 Cadillac Escalade, ESV, EXT
- ✔ 2003-2007 Hummer H2
- ✔ 2004-2007 Chevrolet Express & GMC Savana Van (w/ opt PRP)
This is the reliable, long-term solution for your 2002-2006 Avalanche 2500 BCM problems. Order yours today and restore your truck’s functionality and your peace of mind.
Frequently Asked Questions
What does a Body Control Module do?
The BCM acts as the central computer for your vehicle’s body-related accessories. It reads inputs from switches (like for your windows, wipers, and lights) and controls the power going to those components, ensuring everything works as intended.
Why is VIN programming so important?
VIN programming loads your truck’s specific software and options—like power seats, keyless entry, or specific lighting—onto the module. Without it, a new BCM won’t know how your truck is equipped, leading to features not working. Our service saves you a mandatory, and often costly, trip to the dealership.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old module or dispose of it without the hassle of sending it back, making the process faster and simpler for you.
What if my airbag light is on after I install it?
This is a normal possibility. For safety, the airbag system (SDM) and BCM must be synced. If the light is on, a repair shop will need to use a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This quick relearn process restores communication and turns off the light.