Restore Full Electrical Function to Your GM Truck or SUV
Are you battling frustrating electrical issues in your 2007-2013 GM vehicle? Intermittent wipers, malfunctioning power windows, a dead HVAC system, or a persistent airbag light can all point to a single culprit: a failing Body Control Module (BCM). This genuine GM BCM, part number 20939138 (interchangeable with 25844480 and others), is the definitive solution. It arrives pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a true plug-and-play installation.
From the Diagnostic Bay
We had a 2013 GMC Sierra 3500 come in with a classic case of BCM failure. The owner reported the radio would turn on and off by itself, the driver’s side power lock was dead, and the A/C blower was intermittent. After confirming power and ground to the module, we knew the internal logic had failed. Installing one of our VIN-programmed BCMs resolved all issues in under 10 minutes. The customer was thrilled to have his truck’s features back without a costly trip to the dealer.
Symptoms of a Failing GM Body Control Module
- ✔ Power windows, door locks, or mirrors operate erratically or not at all.
- ✔ Interior or exterior lights (headlights, dome lights) fail to work correctly.
- ✔ The HVAC system is unresponsive, or the blower motor works intermittently.
- ✔ Your vehicle’s security system malfunctions, causing starting issues or false alarms.
- ✔ An airbag warning light is illuminated on the dash, often with DTC B1001.
- ✔ Unexplained battery drain when the vehicle is off.
- ✔ Communication errors with other vehicle modules are present during a scan.
The Plug-and-Play Advantage: Pre-Programmed for Your Vehicle
The biggest hurdle in replacing a modern BCM is the complex programming required to sync it with your vehicle’s unique systems and security features. We handle that for you. By programming this module with the latest GM software updates matched to your VIN, we deliver a part that is ready for immediate installation right out of the box. This restores factory functionality and ensures all integrated systems, from the instrument cluster to the remote keyless entry, operate as designed.
Your Direct-Fit 2013 Sierra 3500 BCM Solution
This module is engineered to meet or exceed original equipment specifications, providing a reliable and lasting repair for your truck. It serves as the central command for your vehicle’s body electronics, and a properly functioning unit is critical for safety and convenience. Installation is straightforward for any DIYer or professional technician. The BCM is typically located under the driver’s side dashboard near the steering column. While the physical swap is quick, be aware that certain post-installation procedures, like an ‘SDM Primary Key’ sync, may be necessary if an airbag light persists. This can be done with most professional-grade scan tools.
This module is a direct replacement for a wide range of part numbers, including: 25835966, 15263363, 15943678, 25790508, 25835965, 25971916, 20939137, and 22860591. It fits numerous models such as the Chevrolet Silverado, Suburban, Tahoe, Avalanche; GMC Sierra, Yukon, Yukon XL; and Cadillac Escalade from 2007 to 2013.
Frequently Asked Questions
What does ‘VIN Programmed’ mean?
It means we pre-load the module with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software. This makes the BCM recognize your truck’s specific options and security system, allowing for a simple plug-and-play installation without needing a trip to the dealership.
Where is the BCM located on my 2013 Sierra 3500?
The Body Control Module is typically found under the driver’s side of the dashboard, often near the steering column or integrated into the fuse panel area.
Will I need to perform any procedures after installing this BCM?
In many cases, it’s a simple plug-and-play installation. However, if your airbag light remains on, a procedure called ‘Setup SDM Primary Key in BCM’ will need to be performed with a professional scan tool. A brake pedal position relearn may also be required on some models.
Is there a core charge for this part?
No, there is no core charge. You can keep your old, faulty module without any obligation to return it.
How do I know if the BCM is really the problem?
A failing BCM typically causes multiple, seemingly unrelated electrical issues. If your power locks, windows, lights, and HVAC are all acting up, the BCM is the most likely cause. A diagnostic scan for B-codes (Body codes) can help confirm the diagnosis.