Restore Full Control Over Your Truck’s Electronics
Are you chasing down frustrating electrical issues in your Chevrolet Avalanche? One moment the power windows work, the next they don’t. Maybe your A/C is acting up, or a persistent airbag light refuses to go away. These aren’t just random glitches; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your truck’s body electronics, and when it starts to fail, it can cause a cascade of problems. This replacement BCM, part number 15136225, is the definitive solution for your 2003-2006 Avalanche 1500 BCM and a wide range of other GM trucks and SUVs.
What sets this module apart is our expert VIN programming service. Before we ship it, we flash the module with your vehicle’s specific VIN and the latest GM software updates. This means it arrives ready for a true plug-and-play installation, eliminating the need for an expensive trip to the dealership for programming. You can restore your vehicle’s functionality right in your own garage, saving both time and money.
Frequently Asked Questions
From the Technician’s Bench: The Case of the Ghostly Glitches
A customer brought in a 2005 Silverado with a laundry list of complaints: intermittent radio, dome light staying on, and a security light that would occasionally prevent the truck from starting. They had already replaced the battery and checked fuses. My initial scan showed a dozen communication codes, all pointing back to the BCM. These modules often fail internally from heat cycles and vibrations, causing poor connections on the circuit board. After installing a VIN-programmed BCM, every single electrical issue was resolved. It’s a common failure I’ve seen hundreds of times on these GMT800 platforms, and a new module is almost always the fix.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ HVAC controls not working or blower motor staying on or off.
- ✔ An airbag warning light on the dash, often with DTC B1001.
- ✔ Vehicle security system issues, including no-start or crank-no-start conditions.
- ✔ Interior or exterior lights behaving strangely (flickering, staying on, not turning on).
- ✔ A cluster of seemingly unrelated diagnostic trouble codes (DTCs) stored in the system.
A Straightforward Guide to Installation
Replacing your 2003-2006 Avalanche 1500 BCM is a job most DIYers can handle in under 15 minutes. Here’s a simple guide to get it done:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the BCM: On most trucks like the Avalanche, Silverado, and Sierra, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large electrical connectors.
- Remove the Old Module: Carefully disconnect the color-coded electrical connectors. They have locking tabs that need to be pressed to release. Once disconnected, unclip or unbolt the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and securely reconnect all electrical connectors. Ensure they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions—lights, windows, locks, HVAC, etc.—to confirm the repair was successful.
Verified Fitment For These GM Vehicles
This module is a direct replacement for part number 15136225 and is interchangeable with several others, including 15116066, 15198116, and 10383536. It is guaranteed to fit the following models:
AVALANCHE 2500 02-06 Body Control (BCM); (under steering column)
CADILLAC ESCALADE, ESV, EXT 03-06 Body Control (BCM); (under steering column)
CHEVROLET EXPRESS / GMC SAVANA VANS 1500/2500/3500 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
CHEVROLET SILVERADO / GMC SIERRA 1500 PICKUP 03-06 Body Control (BCM); (under steering column), Crew Cab
CHEVROLET SILVERADO / GMC SIERRA 1500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
CHEVROLET SILVERADO / GMC SIERRA 2500 PICKUP 03-05 Body Control (BCM); (under steering column), Crew Cab
CHEVROLET SILVERADO / GMC SIERRA 2500 PICKUP 06-07 Body Control (BCM); classic style, (under steering column), Crew Cab
CHEVROLET SILVERADO / GMC SIERRA 3500 PICKUP 03-05 Body Control (BCM); (under steering column), crew cab
CHEVROLET SILVERADO / GMC SIERRA 3500 PICKUP 06-07 Body Control (BCM); classic style, (under steering column), crew cab
CHEVROLET SUBURBAN / GMC YUKON XL 1500/2500 03-06 Body Control (BCM); (under steering column)
CHEVROLET TAHOE / GMC YUKON 03-06 Body Control (BCM); (under steering column)
GMC SIERRA DENALI 03-07 Body Control (BCM); classic style, (under steering column)
HUMMER H2 03-07 Body Control (BCM); (LH dash)
Frequently Asked Questions
From the Technician’s Bench: The Case of the Ghostly Glitches
A customer brought in a 2005 Silverado with a laundry list of complaints: intermittent radio, dome light staying on, and a security light that would occasionally prevent the truck from starting. They had already replaced the battery and checked fuses. My initial scan showed a dozen communication codes, all pointing back to the BCM. These modules often fail internally from heat cycles and vibrations, causing poor connections on the circuit board. After installing a VIN-programmed BCM, every single electrical issue was resolved. It’s a common failure I’ve seen hundreds of times on these GMT800 platforms, and a new module is almost always the fix.