Tired of Unpredictable Electrical Problems in Your GM Truck?
If you’re dealing with a frustrating mix of electrical issues in your 2002-2006 Chevrolet Avalanche 2500—like climate controls that have a mind of their own, power windows that won’t budge, or a security light that keeps you from starting your engine—you’ve likely met the culprit: a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause chaos. This isn’t just an inconvenience; it can affect your vehicle’s safety and security. Our replacement BCM, equivalent to GM part number 15137393, is the reliable, permanent fix you need.
We take the guesswork and high dealership costs out of the equation. Each module is expertly programmed to your vehicle’s specific VIN before shipping. This ensures it communicates perfectly with your truck’s other systems right out of the box. No expensive programming tools, no trip to the dealer—just a straightforward solution to get your truck back to 100%.
A Technician’s Notebook: The Case of the Haunted Silverado
A customer brought in his ’05 Silverado 2500 with a list of complaints that sounded like a prank. The radio would switch stations on its own, the driver’s side window worked only on Tuesdays (his words), and the airbag light was on. His scan tool showed a B1001 (Option Configuration Error) and a slew of ‘loss of communication’ codes. Instead of chasing each problem individually, my experience pointed straight to the BCM. These modules are notorious for internal board failures causing erratic behavior. We installed a VIN-programmed BCM, and in less than 10 minutes, every single issue was resolved. This is a classic example of how a single component, the 2002-2006 Avalanche 2500 BCM, can be the root of many problems.
Is Your Truck Showing These Symptoms?
- ✔ The HVAC blower motor works intermittently or not at all.
- ✔ Power windows, door locks, or interior/exterior lights fail to operate correctly.
- ✔ The airbag warning light is illuminated, often with a DTC like B1001.
- ✔ Your vehicle’s security system acts up, causing a no-start condition or random alarm triggers.
- ✔ You’re seeing multiple communication DTCs (U-codes) related to body systems.
- ✔ Unpredictable electrical behavior, like the radio or wipers turning on by themselves.
Your 5-Minute Path to a Fully Functional Truck
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the system.
- ✔ Locate the BCM: On most trucks like the Avalanche, Silverado, and Sierra, you’ll find the BCM under the driver’s side dashboard, near the steering column. It has several large electrical connectors.
- ✔ Swap the Module: Carefully unplug the wiring harnesses from the old BCM. Remove any mounting screws or clips holding it in place. Install the new, pre-programmed module and securely reconnect all harnesses.
- ✔ Reconnect and Test: Reconnect the battery terminal. Start your vehicle and test all the functions that were previously failing—windows, locks, lights, and HVAC.
- ✔ Post-Install Checks: In some cases, an airbag light may require a ‘Setup SDM Primary Key’ procedure with a pro-level scan tool. This is a simple sync process. See our FAQ for more details.
Verified Compatibility for Your GM Vehicle
This module is a direct-fit replacement for a wide range of GM trucks and SUVs, ensuring OEM-level performance. It is interchangeable with part numbers 10383536, 15116066, 15136225, 15136877, 15137393, and more. It is confirmed to fit the following models:
- Chevrolet Avalanche 1500/2500 (2002-2006)
- Chevrolet Silverado & GMC Sierra 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Suburban & GMC Yukon/Yukon XL (2003-2006)
- Chevrolet Tahoe (2003-2006)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
- Chevrolet Express & GMC Savana Van (2004-2007)
Frequently Asked Questions
What does ‘VIN Programmed’ mean for me?
It means we flash the module with your vehicle’s unique Vehicle Identification Number (VIN) and the latest GM software before it ships. This makes the installation plug-and-play, saving you from a costly and time-consuming trip to the dealership for programming.
Is there a core charge for my old BCM?
No, there is absolutely no core charge. You can keep your old part or dispose of it without the hassle of returning it.
My airbag light is on after installing the new BCM. What do I do?
This is a normal security feature. The new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A mechanic with a bi-directional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to turn the light off.
How difficult is the installation? Can I do it myself?
For most DIYers, this is a very simple job. The BCM is typically held in by clips or a couple of screws under the dashboard. With basic hand tools, the swap takes less than 15 minutes.
Will this fix my specific problem?
This module is the solution for the vast majority of electrical issues listed in the symptoms section. If your truck is experiencing problems with windows, locks, security, lights, or HVAC, a failing BCM is the most common cause. This part is designed to be a complete fix for those issues.