If your 2003-2006 Chevrolet Avalanche 1500 is plagued by frustrating electrical problems like intermittent wipers, unpredictable power locks, or a non-responsive climate control system, a failing Body Control Module (BCM) is the most likely culprit. As the central command center for your truck’s body electronics, a faulty BCM can cause a cascade of issues that are difficult to diagnose. This replacement Body Control Module, equivalent to GM part number 15194170, arrives pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership programming and getting you back on the road fast.
This isn’t just a part; it’s a complete, ready-to-install solution. We handle the complex programming so you can enjoy a simple, plug-and-play repair. By restoring communication between critical systems, this module resolves common issues from erratic gauge behavior to security system faults that can even prevent your truck from starting. Built to meet or exceed original equipment standards, it’s the reliable fix for your daily driver or workhorse truck.
From the Diagnostic Bay
I remember a 2005 Silverado that came into the shop with a laundry list of bizarre symptoms. The radio would turn on by itself, the driver’s side window wouldn’t go down, and the airbag light was on with a B1001 code. The owner had already replaced the window switch and checked fuses. After confirming power and ground at the BCM connectors, we knew where the problem was. A faulty BCM was sending ghost signals across the network. Installing a VIN-programmed module like this one solved every single issue in under 10 minutes. It’s a classic failure on these GMT800 platforms, and a pre-programmed unit is the most efficient fix for both pros and DIYers.
Is Your Avalanche Exhibiting These Failure Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s time to consider a replacement 2003-2006 Avalanche 1500 BCM:
- ✔ The HVAC blower motor works intermittently or not at all.
- ✔ Your power windows, door locks, or interior lights behave erratically.
- ✔ The security or anti-theft system malfunctions, causing no-start conditions.
- ✔ An airbag warning light is illuminated, often with Diagnostic Trouble Codes (DTCs) like B1001.
- ✔ You’re getting communication error codes (U-codes) when scanning the vehicle.
- ✔ Wipers or exterior lights operate on their own or fail to turn on.
A Straightforward Guide to Installation
One of the best features of this module is its simple installation. You can have your truck’s electronics working properly again in just a few minutes with basic hand tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all modules have powered down completely.
- Locate the BCM: On the 2003-2006 Avalanche 1500, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several multi-pin connectors.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Unbolt or unclip the old module from its bracket and install the new one in its place.
- Reconnect and Test: Securely plug the connectors into your new BCM. Reconnect the battery terminal. Start the vehicle and test all functions—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
Post-Installation Note: In some cases, particularly if the airbag light was on, a ‘Setup SDM Primary Key in BCM’ procedure may be required using a professional scan tool. This syncs the new BCM with the airbag system. Additionally, a Brake Pedal Position Relearn might be needed on certain models. Always consult a service manual for vehicle-specific requirements.
Verified Vehicle Compatibility
This Body Control Module is a direct replacement for part number 15194170 and other interchangeable numbers (including 15116066, 15136225, and 15198116). It is guaranteed to fit the following GM vehicles:
- Chevrolet Avalanche 1500/2500: 2003-2006
- Chevrolet Silverado 1500/2500/3500 Pickup (Crew Cab): 2003-2007 (Classic)
- Chevrolet Suburban 1500/2500: 2003-2006
- Chevrolet Tahoe: 2003-2006
- Chevrolet Express Van 1500/2500/3500 (w/ opt PRP): 2004-2007
- GMC Sierra 1500/2500/3500 Pickup (Crew Cab): 2003-2007 (Classic)
- GMC Sierra Denali: 2003-2007 (Classic)
- GMC Yukon & Yukon XL 1500/2500: 2003-2006
- GMC Savana Van 1500/2500/3500 (w/ opt PRP): 2004-2007
- Cadillac Escalade, ESV, EXT: 2003-2006
- Hummer H2: 2003-2007
Frequently Asked Questions
Q: What does ‘VIN Programmed’ mean for me?
A: It means the module arrives ready for installation right out of the box. We load your vehicle’s VIN and the latest GM software onto the BCM before shipping. This ensures it communicates perfectly with your truck’s other systems, saving you a trip to the dealership for costly programming.
Q: Do I need to return my old BCM?
A: No. There is absolutely no core charge or need to send your old part back. You can keep it or dispose of it at your convenience.
Q: Will this fix my airbag light?
A: If the airbag light is caused by a BCM failure (like DTC B1001), this module will resolve the root cause. However, after installation, the airbag system (SDM) may need to be synced with the new BCM using a bidirectional scan tool to turn the light off.
Q: How difficult is the installation?
A: For most DIYers with basic tools, this is a very simple job that takes less than 15 minutes. The BCM is easily accessible under the dash, and the process involves unplugging the old unit and plugging in the new one.
Q: What exactly does this 2003-2006 Avalanche 1500 BCM control?
A: The BCM is the brain for your vehicle’s comfort and convenience features. It manages the operation of interior and exterior lights, power windows and locks, the alarm system, wipers, and the heating and air conditioning (HVAC) system.