Restore Full Electrical Function to Your SUV
Are you dealing with frustrating and unpredictable electrical problems in your Buick Rainier, Trailblazer, or Envoy? Flickering lights, malfunctioning power windows and locks, or dashboard warning lights that come and go are common signs of a failing Body Control Module (BCM). Don’t let these electrical gremlins compromise your vehicle’s reliability. This module is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a straightforward installation process.
Common Symptoms & Your Solution
A faulty BCM can cause a wide range of issues that can be difficult to diagnose. If you’re experiencing any of the following, a failing BCM is the likely culprit:
- Interior or exterior lights working erratically or not at all
- Power windows, door locks, or mirrors behaving unpredictably
- Instrument cluster gauges dropping out or giving false readings
- Security system faults or random alarm activation
- Communication issues with other vehicle modules (often showing U-codes)
- Intermittent no-start conditions where the engine cranks but won’t fire
This replacement 2005-2007 Buick Rainier BCM is the direct answer to these problems. We flash the unit with the latest GM software updates and program it using your VIN, ensuring it communicates perfectly with your vehicle’s existing components right out of the box.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: This module arrives ready for installation, saving you the time, cost, and hassle of a trip to the dealership for programming.
- ✔ Restores Full Functionality: Puts an end to frustrating electrical issues, making your vehicle’s accessories reliable once again.
- ✔ Direct-Fit Replacement: Engineered to be a perfect match for the original unit, compatible with part numbers 25802312, 8258023120, 15135466, and 15787809.
- ✔ No Core Charge: Keep your old part. There are no core fees or return hassles to worry about.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: Why BCMs Fail on GMT360 Platform SUVs
As a veteran technician, I’ve seen countless BCM issues on the GMT360 platform (Trailblazer, Envoy, Rainier, etc.). The BCM, which is integrated into the under-hood fuse block, is the central hub for your vehicle’s body electronics. Its location exposes it to constant heat cycles and vibrations. Over 15+ years, these stressors can cause internal solder joints to crack and electronic components to degrade, leading to the bizarre electrical problems you’re likely facing. Our solution provides a reliable module with fresh programming, effectively resolving these common age-related failure points and restoring your vehicle’s electrical system to factory-spec operation.
Important Post-Installation Information
While this 2005-2007 Buick Rainier BCM is designed for a simple installation, some vehicles may require additional steps to ensure all systems are properly synced. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag module.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary to ensure correct brake light and traction control function.
Always consult a factory service manual or a qualified technician for vehicle-specific guidance.
Frequently Asked Questions
Is this module truly plug-and-play?
Yes, for the vast majority of vehicles. Because we program it to your VIN before shipping, it eliminates the need for dealership programming. In some cases, as noted above, minor relearn procedures like for the airbag or brake sensor may be required with a professional scan tool.
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 ship your order until we receive this information, as it is essential for programming the module correctly.
What if my original part number isn’t an exact match to the ones listed?
The part numbers listed (25802312, 8258023120, 15135466, 15787809) are interchangeable for the specified vehicles. As long as your vehicle make, model, and year are on the compatibility list, this module will work when programmed to your VIN.
Will this fix my intermittent no-start problem?
It can. A failing BCM can disrupt the vehicle’s anti-theft system (PassLock/PassKey), preventing the engine from starting. If your no-start issue is accompanied by other electrical symptoms, this 2005-2007 Buick Rainier BCM is a very likely solution.
What tools are needed for installation?
Installation typically requires basic hand tools, such as a socket set and screwdrivers, to access and remove the under-hood fuse block assembly. No special programming tools are needed on your end.