Fix Your Truck’s Electrical Gremlins for Good
If you’re dealing with the frustrating and unpredictable electrical issues common in GM trucks, you know how maddening it can be. One minute your A/C works, the next it’s dead. Your power windows have a mind of their own, or worse, you’re staring at a persistent airbag light. This isn’t just an annoyance—it’s a reliability issue. This Body Control Module (BCM), corresponding to part number 15901388, is the central nervous system for your vehicle’s body electronics. When it fails, chaos ensues. We offer a dependable, straightforward solution: a high-quality replacement BCM, pre-programmed to your truck’s specific VIN for a true plug-and-play fix.
Case Study: The Ghost in the Machine
I remember a 2009 Sierra 2500 that came into my shop with a laundry list of bizarre symptoms. The owner had already replaced the battery and alternator, but the radio would still cut out, the dome lights would flicker, and the truck would occasionally refuse to start, citing a security error. After checking all the primary power and ground connections, we hooked up the scanner and saw a flood of communication errors pointing back to one component: the BCM. A failing Body Control Module was causing a network-wide disruption. We installed a VIN-programmed module, and in less than 10 minutes, every single phantom issue was gone. This is a classic failure I’ve diagnosed hundreds of times on this GM platform.
Is Your GM Truck Showing These Electrical Gremlins?
A failing BCM doesn’t always trigger a check engine light. Instead, it creates a host of other problems. If you’re experiencing any of the following, a faulty BCM is the likely culprit:
- ✔ Unresponsive or intermittent HVAC and climate controls.
- ✔ Power windows, door locks, or mirrors not working correctly.
- ✔ The security system acting up, causing no-start or stalling conditions.
- ✔ An illuminated airbag light, often with a DTC like B1001 (Setup SDM Primary Key in BCM).
- ✔ Headlights, taillights, or interior lights flickering or failing to turn on/off.
- ✔ Communication codes (U-codes) stored in other modules.
Get Your Truck Back to Normal: A 5-Minute Installation Guide
Installing your new 2007-2011 Sierra 3500 BCM is a simple process that most DIYers can complete with basic tools. Since we pre-program the module to your VIN, you can skip the expensive trip to the dealership.
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on electrical components.
- Locate the BCM: On most of these GM trucks and SUVs, the BCM is located under the driver’s side dashboard, near the steering column. It’s a black box with several large electrical connectors.
- Swap the Module: Carefully unplug the wiring harnesses from the old BCM. They have locking tabs that need to be depressed. Once unplugged, unclip or unbolt the old module and remove it.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all wiring harnesses. You’ll hear a ‘click’ when they are properly seated.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, wipers, windows, locks, and HVAC to confirm the repair.
Important Post-Installation Note: In some cases, an airbag light may remain on. This is a security handshake procedure. It requires a bi-directional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. A Brake Pedal Position Relearn may also be needed. There is no core charge for this part, so you can keep your old one without any hassle.
Verified to Fit These GM Trucks and SUVs
This module is a direct replacement for part number 15901388 and other interchangeable numbers, ensuring broad compatibility across the GM family. Please verify your model and year below.
ESCALADE ESV 07-11
ESCALADE EXT 07-11
AVALANCHE 1500 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-13
SIERRA 3500 PICKUP 07-13
SIERRA DENALI 07-13
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-13
SILVERADO 3500 PICKUP 07-13
SUBURBAN 1500 07-11
SUBURBAN 2500 07-11
TAHOE 07-11
YUKON 07-11
YUKON XL 1500 07-11
YUKON XL 2500 07-11
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that manages many of your vehicle’s non-engine related functions. This includes power windows, door locks, the security system, interior and exterior lighting, wipers, and the HVAC system. When it fails, these systems can become erratic or stop working altogether.
Is this part difficult to install myself?
Not at all. For most people with basic mechanical skills, the installation takes less than 10 minutes. The BCM is typically located under the driver’s side dash and is held in by simple clips or bolts. No special tools are required for the physical swap.
Will I need to visit a dealership after installing this BCM?
No. The main benefit of our service is that we pre-program the module to your vehicle’s VIN. This means it’s ready to install right out of the box, saving you the time and expense of a dealership programming appointment.
What if my airbag light is still on after installation?
This is a known GM security procedure. If the light persists, you will need a professional scan tool with bi-directional capabilities to perform the ‘Setup SDM Primary Key in BCM’ function. This syncs the new BCM with the airbag system. Most independent repair shops can perform this service if needed.
Is there a core charge for my old part?
No, there is no core charge. You can keep or dispose of your old module without needing to send it back to us, simplifying the repair process for you.
How do I ensure this is the exact part for my truck?
The best way is to match the part number from your original BCM. This module replaces part number 15901388 and many others. You can also use our vehicle compatibility list or contact our expert support team with your VIN, and we’ll guarantee you get the right part.