Restore Full Functionality to Your GM Vehicle
Are you battling frustrating electrical issues in your Cadillac Escalade, Chevy Silverado, or GMC Sierra? Randomly failing power windows, a dead HVAC system, or a persistent airbag light can often be traced back to one component: a faulty Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a failing BCM can create a cascade of problems that seem unrelated. This part, number 15901388, is the central command center for your vehicle’s body electronics, and replacing it is the definitive solution to these electrical gremlins.
This module arrives expertly programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and complex programming tools. It’s a true plug-and-play fix designed for both professional mechanics and determined DIYers. By restoring stable communication between your vehicle’s systems, this BCM resolves common issues and ensures everything from your interior lights to your security system works as intended.
Is Your GM Truck Showing These Symptoms?
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ The HVAC blower motor or climate controls work sporadically or not at all.
- ✔ An airbag warning light is illuminated on the dash, often with DTC B1001.
- ✔ The security system malfunctions, causing no-start conditions or false alarms.
- ✔ Headlights, taillights, or interior dome lights behave erratically.
- ✔ Windshield wipers won’t turn on, or won’t turn off.
Case Study: The Ghost in the Airbag System
A 2009 Silverado 1500 came into my shop with an airbag light that two other shops couldn’t fix. They had replaced sensors and wiring to no avail. The code was a stubborn B1001, indicating a communication failure. After confirming the grounds were solid (a common issue on these GMT900 platforms), I suspected the BCM. The original module was causing data corruption on the CAN bus network. We installed one of our VIN-programmed BCMs, and while the truck’s other electrical issues vanished, the airbag light remained. This is where experience pays off. Using a bi-directional scanner, we performed the ‘Setup SDM Primary Key in BCM’ procedure. In less than two minutes, the new BCM and the airbag module were synced, the light went out, and the customer was thrilled to have his truck back, fully functional and safe.
A Straightforward Guide to Installation
Replacing your 2007-2011 Escalade Body Control Module is a quick job that typically requires no special tools and can be completed in under 15 minutes right in your driveway.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most compatible models, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large multi-pin electrical connectors.
- Remove the Old Module: Carefully depress the locking tabs on each electrical connector and pull them straight out. The module itself is usually held in place by simple clips or a few small bolts. Remove them and slide the old BCM out.
- Install the New BCM: Slide your new, pre-programmed module into place and secure it. Firmly reconnect all electrical connectors, ensuring they click and lock into position.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and test all functions—windows, locks, wipers, lights, and HVAC. In most cases, the job is done. If an airbag light appears, the “Airbag System Sync” procedure noted in our FAQs may be required using a professional scan tool.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 15901388 and is interchangeable with a wide range of other part numbers, including 25844480, 25835966, 15263363, 15878753, 15943678, 20939137, and 22860591. It provides guaranteed fitment for the following vehicles:
- Cadillac Escalade / ESV / EXT: 2007, 2008, 2009, 2010, 2011
- Chevrolet Avalanche 1500: 2007, 2008, 2009, 2010, 2011
- Chevrolet Silverado 1500 / 2500 / 3500: 2007 (New Body Style), 2008, 2009, 2010, 2011, 2012, 2013
- Chevrolet Suburban 1500 / 2500: 2007, 2008, 2009, 2010, 2011
- Chevrolet Tahoe: 2007, 2008, 2009, 2010, 2011
- GMC Sierra 1500 / 2500 / 3500 & Denali: 2007 (New Body Style), 2008, 2009, 2010, 2011, 2012, 2013
- GMC Yukon / Yukon XL & Denali: 2007, 2008, 2009, 2010, 2011
Note: For 2007 models, this fits the ‘New Body Style’ (smooth door skin) trucks and SUVs. If you have any fitment questions, our expert team is here to help.
What does VIN programming do for me?
What does VIN programming do for me?
VIN programming configures the module specifically for your vehicle’s factory options and security system. This makes the installation plug-and-play, avoiding a mandatory and costly trip to the dealership for programming. It ensures all features work correctly right out of the box.
Do I need to send my old BCM back?
No. There is absolutely no core charge for this part. You can keep your old module, which saves you the time and hassle of packaging and shipping a return.
My airbag light is on after installing the new BCM. What do I do?
This is a known security handshake procedure for GM vehicles. You will need a professional-grade scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. This re-syncs the new BCM with your vehicle’s airbag system (SDM) and will turn off the light.
Will this fix my dead A/C and blower fan?
In many cases, yes. The BCM directly controls the HVAC system’s logic and power signals. If you’ve already checked fuses and the blower motor resistor and they are good, a faulty BCM is the most likely cause of failure for the entire climate control system.
Is this a difficult part for a DIYer to replace?
Not at all. This is one of the easier modules to replace. It’s typically located in an accessible spot under the dash and held in by simple clips or small bolts. The entire process usually takes less than 15 minutes with basic hand tools.