Restore Full Electrical Function to Your GM Truck or SUV
Are you battling frustrating electrical issues in your GMC Sierra, Chevrolet Silverado, or Cadillac Escalade? Flickering lights, malfunctioning power windows, a dead HVAC system, or a persistent airbag light are common signs of a failing Body Control Module (BCM). The BCM acts as the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a cascade of confusing problems. This genuine quality GM BCM, part number 25790509 (interchangeable with 25844480), is the definitive solution to restore your vehicle’s performance and reliability.
Diagnosing and Replacing Your 2013 Sierra Denali BCM
A failing BCM doesn’t just affect convenience features; it can impact vehicle security and safety systems. If you’re experiencing any of the symptoms listed below, it’s a strong indicator that your module needs replacement. Our BCMs come pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership programming. This ensures a seamless, plug-and-play installation process that gets you back on the road quickly.
Common Symptoms of a Failing BCM
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights staying on, flickering, or failing to work.
- ✔ HVAC and climate control functions being unresponsive or behaving erratically.
- ✔ The security system malfunctioning, causing no-start conditions or false alarms.
- ✔ An illuminated airbag warning light, often with DTC B1001.
- ✔ Unexplained battery drain due to the BCM not allowing other modules to sleep.
- ✔ Various communication DTCs stored in the system.
Installation and Post-Install Procedures
The BCM is typically located under the driver’s side dashboard, near the steering column. Installation takes only a few minutes with basic hand tools. While our VIN programming handles the majority of the setup, some vehicles may require additional steps after installation:
- Airbag System Sync: If the airbag light remains on after installation, a technician will need to perform the “Setup SDM Primary Key in BCM” procedure using a professional scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor relearn may be necessary to ensure correct brake light and traction control operation.
This module is a direct replacement for numerous part numbers, including 25835966, 15263363, 25790508, 25823558, 20939137, and 22860591. Restore your vehicle’s electronic stability and peace of mind with this reliable, ready-to-install 2013 Sierra Denali BCM.
Frequently Asked Questions
What does the Body Control Module do on my 2013 Sierra?
The BCM is a computer that manages and controls most of your truck’s non-engine related electronic systems. This includes power windows, door locks, interior and exterior lighting, the security system, wipers, and HVAC blower controls.
Is this BCM ready to install right out of the box?
Yes. We program the module to your vehicle’s specific VIN before shipping. This makes the installation plug-and-play and means you do not need to visit a dealership for additional programming.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your old module without any extra fees or hassle.
Will this part fix my airbag light with a B1001 code?
A faulty BCM is a common cause of the B1001 code. Replacing it often resolves the issue, but you may need a scan tool to perform the “Setup SDM Primary Key in BCM” procedure after installation to clear the light.
Where is the BCM located on my truck?
The BCM is typically found under the driver’s side dashboard, often attached to a bracket near the steering column or the junction block.