Is Your GM Truck or SUV Experiencing Strange Electrical Issues?
If your 2003-2007 GMC Sierra Denali, Chevrolet Silverado, or Tahoe is suffering from frustrating electrical problems, a failing Body Control Module (BCM) is often the culprit. The BCM acts as the central nervous system for your vehicle’s body electronics, managing everything from your power windows and door locks to the HVAC system and security features. When it fails, it can cause a cascade of seemingly unrelated issues that are difficult to diagnose.
This OEM-quality replacement BCM, part number 15136225, is the definitive solution. We pre-program it to your vehicle’s specific VIN, ensuring it works perfectly right out of the box. This eliminates the need for expensive dealership visits for programming, making it a true plug-and-play fix that restores your vehicle’s full functionality and reliability.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC controls not working or blower motor operating erratically.
- ✔ Airbag warning light illuminated on the dash, often with a B1001 code.
- ✔ Security system malfunctions, leading to no-start or key recognition problems.
- ✔ Exterior or interior lights behaving unpredictably (staying on or not turning on).
- ✔ Erratic windshield wiper operation.
Why Choose Our 2003-2007 Sierra Denali BCM?
This module is engineered to meet and exceed original equipment standards for a dependable, long-lasting repair. By ordering from us, you get a part that is not only matched to your vehicle but also loaded with the latest GM software updates for optimal performance. The VIN programming service is included, saving you time and hundreds of dollars in dealership fees. Installation is simple for any DIYer; the BCM is typically located under the driver’s side dash near the steering column. Disconnect the battery, swap the modules, and reconnect. In most cases, you’ll be back on the road in minutes.
Post-Installation Notes: In some vehicles, if the airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system. A brake pedal position relearn may also be required on certain models. There is no core charge, so you can keep your old part without any hassle.
Frequently Asked Questions
What does a Body Control Module do?
The BCM is a computer that controls and monitors many of your vehicle’s non-engine related functions, such as power windows, locks, lights, wipers, security system, and climate controls.
Is this part really plug-and-play?
Yes. We program the module to your vehicle’s VIN before shipping. This means it’s ready for installation right out of the box with no additional dealership programming required for most functions.
What if my airbag light is on after installing the new BCM?
This is a normal possibility. It means the new BCM needs to be electronically introduced to the airbag system (SDM). A mechanic with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Where is the BCM located on my 2005 GMC Sierra?
On most 2003-2007 GM trucks and SUVs like the Sierra, Silverado, and Tahoe, the BCM is located under the driver’s side dashboard, near the steering column.
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.