Are you tired of chasing electrical gremlins in your GM truck? One moment your power windows work, the next they don’t. Your HVAC controls have a mind of their own, and a persistent airbag light is on your dash. These aren’t separate problems; they’re classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause widespread, frustrating issues. This OEM-quality replacement module, part number 15901388, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play fix.
Is Your Truck Showing These Symptoms?
- ✔ Intermittent or non-functional power windows, door locks, or remote keyless entry.
- ✔ Erratic interior and exterior lighting, including headlights or dome lights that won’t turn off.
- ✔ HVAC system failures, such as a blower motor that won’t run or temperature controls that don’t respond.
- ✔ An active airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Vehicle security system acting up, causing no-start conditions or random alarm activation.
- ✔ Communication errors with other modules on the network, leading to a variety of DTCs.
Case Study: A Tricky Diagnosis
I had a 2013 GMC Sierra 3500 in my bay last month with a customer complaint of the radio display flickering and the airbag light being on. The initial scan showed a B1001 code and a slew of U-codes (loss of communication). Another shop had already replaced the battery, suspecting a voltage issue. After verifying the main power and ground connections to the BCM under the driver’s side dash were solid, we knew the module itself was the culprit. These units often fail internally, causing data corruption on the CAN bus. We installed one of our VIN-programmed BCMs, performed the quick SDM key sync with our scanner, and all the ghost-like electrical issues vanished. The customer was back on the road in under an hour, problem solved.
A Straightforward Guide to Installation
Replacing the 2013 Sierra 3500 Body Control Module is a job most DIYers can handle in minutes. It’s designed for simplicity, getting you back to a fully functional truck without a costly trip to the dealership.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On most GM trucks from this era, the BCM is located under the driver’s side dashboard, typically to the left of the steering column. It’s a black box with several large multi-pin connectors.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unclip or unbolt the old module from its mounting bracket.
- Install the New Module: Seat the new, VIN-programmed BCM into the mounting bracket and securely plug in all the connectors. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position and test all functions: lights, locks, windows, wipers, and HVAC.
- Post-Install Sync (If Needed): If the airbag light remains on, a simple ‘Setup SDM Primary Key in BCM’ procedure is required using a compatible bi-directional scan tool. This syncs the new BCM with the airbag system and is a common final step.
Will This Fit My Truck?
This module is a direct replacement for part number 15901388 and is interchangeable with several other part numbers, including 25844480, 25835966, 20939137, and 22860591. It provides guaranteed fitment for the following vehicles:
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 & 3500 PICKUP 07-13
SIERRA DENALI 1500/2500/3500 07-13
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 & 3500 PICKUP 07-13
SUBURBAN 1500 & 2500 07-11
TAHOE 07-11
YUKON & YUKON XL 1500/2500 07-11
(Note: For 2007 models, this fits the ‘New Style’ with a smooth door skin. Some 2010-2013 models may require matching ID 25835966, which this part covers.)
Frequently Asked Questions
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means we load your vehicle’s unique Vehicle Identification Number (VIN) and all related factory calibrations onto the module before we ship it. This makes the installation plug-and-play, eliminating the need for an expensive programming session at a dealership. Your truck will recognize it as the original part.
Do I need to send my old BCM back? Is there a core charge?
No. We believe in making your repair as simple as possible. There is absolutely no core charge, and you do not need to return your old, faulty module to us.
Why is my airbag light still on after installing the new BCM?
This is a normal security measure in GM vehicles. The new BCM needs to be electronically ‘introduced’ to the airbag system’s Sensing and Diagnostic Module (SDM). This is done with a scan tool using the ‘Setup SDM Primary Key in BCM’ function and takes just a minute for a technician to complete.
Can a bad BCM cause my truck not to start?
Yes, absolutely. The BCM is a critical part of the vehicle’s anti-theft and security system (Passlock/Passkey). If it fails, it can prevent the engine from starting or cause it to stall intermittently, as it can’t verify the security credentials.
Is this a quality, dependable part?
Yes. We source only high-quality modules built to meet or exceed OEM specifications. Every unit is tested after programming to ensure full functionality and is backed by our one-year warranty for your peace of mind.