Restore Full Electronic Control to Your GM Vehicle
Are strange and frustrating electrical issues making your vehicle unreliable? Flickering lights, unresponsive power windows, a security system that acts on its own, or even a vehicle that won’t start can all point to a single culprit: a failing Body Control Module (BCM). This vital component is the central nervous system for your vehicle’s body electronics, and when it falters, it can cause a cascade of confusing problems. This isn’t just an inconvenience; it’s a matter of safety and reliability. Stop chasing electrical gremlins and restore your vehicle’s proper function with our pre-programmed BCM solution.
Common Symptoms & Your Solution
A faulty BCM can manifest in numerous ways, often leaving owners and even technicians guessing. If you’re experiencing any of the following, this module is the definitive solution you’ve been looking for:
- Erratic or non-functional interior and exterior lights
- Power windows, door locks, or mirrors working intermittently or not at all
- Instrument cluster warning lights illuminating without cause (e.g., security light)
- Problems with the radio, climate control, or other accessories
- Remote keyless entry failure
- Communication error codes (U-codes) stored in the system
- A no-start condition where the engine cranks but won’t fire due to a security system fault
Our Programmed GM Body Control Module 20815898 arrives at your door specifically flashed to your vehicle’s unique VIN. This critical step bypasses the need for expensive and time-consuming dealership programming, turning a complex electronic repair into a straightforward component replacement.
Features & Benefits
- ✔ Plug & Play Installation: This BCM is professionally programmed to your vehicle’s VIN before shipping. This means no additional programming or dealer visits are required for most vehicles, saving you hundreds of dollars and significant hassle.
- ✔ Loaded with the Latest GM Software: We flash each module with the most current vehicle-specific software available from GM. This ensures optimal performance, compatibility, and communication with all other electronic modules in your vehicle.
- ✔ Solves Annoying Electrical Faults: Engineered to restore function to your vehicle’s body systems, this module is the direct solution for the erratic behavior caused by a failing original BCM.
- ✔ Broad GM Compatibility: This single part number, 20815898, is the correct service replacement for dozens of original part numbers, covering a wide range of Cadillac, Chevrolet, GMC, Buick, Saturn, and Hummer models.
- ✔ No Core Charge: Keep your old module. We don’t require you to send the original part back, simplifying the process and getting your vehicle repaired faster.
- ✔ This unit is backed by our one-year replacement warranty. Purchase with the confidence that your investment is protected against defects.
Expert Insight: Restoring Your Vehicle’s Central Command
Think of the BCM as the vehicle’s middle manager. It doesn’t control the engine, but it manages almost everything you interact with from the driver’s seat—the lights, the windows, the locks, the climate fans, and the security system. When it fails, it’s like that manager is having a bad day, giving random and incorrect commands to all its subordinates. The result is chaos. By providing a BCM that’s pre-programmed with the latest, clean software matched precisely to your VIN, we’re not just sending a part; we’re restoring order to your vehicle’s entire electronic command structure. This ensures every component works in harmony, just as the manufacturer intended.
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship the module without it. Please double-check the VIN for accuracy to ensure perfect compatibility.
Is this a difficult part to install?
The physical installation is typically straightforward for someone with moderate mechanical skill. The BCM is usually located under the dashboard on the driver’s or passenger’s side. The main challenge is typically the programming, which we have already handled for you, making the process much simpler.
Will I need to perform any procedures after installation?
In some cases, yes. As noted, certain vehicles may require an ‘Airbag System Sync’ or a ‘Brake Pedal Position Relearn’ using a professional scan tool if related warning lights appear. These are standard post-replacement procedures for many modern vehicles.
What functions does the Body Control Module control?
The BCM manages a wide array of non-engine related functions, including but not limited to: interior/exterior lighting, power windows and locks, the anti-theft/security system, keyless entry, instrument panel illumination, and warning chimes.
Is this BCM compatible with my vehicle?
This module replaces a large number of original GM part numbers and fits a wide variety of vehicles. Please review the detailed fitment list on this page or match your original part number to the list provided to confirm compatibility.