Tired of Baffling Electrical Problems in Your SUV?
Are you dealing with power windows that have a mind of their own, dashboard lights that won’t turn off, or a security system that randomly prevents your vehicle from starting? A failing Body Control Module (BCM) can turn your reliable Isuzu Ascender, Chevy Trailblazer, or GMC Envoy into a source of daily frustration. This pre-programmed BCM is the definitive, hassle-free solution to restore your vehicle’s electronic systems to perfect working order, getting you back on the road with confidence.
Common Symptoms of a Failing BCM & Your Solution
If you’re experiencing any of the following issues, a faulty BCM is the likely culprit:
- Erratic or non-functional power windows, door locks, or mirrors.
- Interior dome lights or dashboard lights staying on or not working at all.
- The security or anti-theft system light is on, and the engine won’t crank.
- Inconsistent A/C and heater blower fan operation.
- False warning messages on the driver information center.
- Communication error codes (U-codes) when scanned with a diagnostic tool.
This module is not just a replacement part; it’s a complete fix. We eliminate the most difficult part of the repair by programming the module to your vehicle’s specific VIN before it ships. This loads the latest GM software updates and ensures your new Isuzu Ascender Body Control Module integrates seamlessly, restoring the precise functionality you’ve been missing.
Features & Benefits
- ✔ VIN-Programmed for Your SUV: We flash the module with your vehicle’s specific VIN before it ships. This means no expensive trips to the dealership for programming.
- ✔ Restore Full Functionality: Regain reliable control over your power windows, door locks, interior lights, security system, and other essential electronic features.
- ✔ Latest GM Software: Your module arrives with the newest factory software updates, ensuring optimal performance and compatibility.
- ✔ Direct-Fit Replacement: Engineered to match OEM specifications for part numbers 15135466, 25802312, 8258023120, and 15787809.
- ✔ No Core Charge Required: Keep your old module. There are no extra fees or return hassles to worry about.
- ✔ Peace of Mind Included: This unit is backed by our one-year replacement warranty.
An Expert Technician’s Insight
As a veteran technician, I’ve seen countless owners replace a BCM only to find the vehicle still won’t start or has the same issues. Why? Because the BCM is the central computer for your vehicle’s electronics—it needs to be specifically coded to your VIN and options package. Our pre-programming service bridges that gap. We take the guesswork and the expensive dealership visit out of the equation, delivering a module that’s truly ready to install right out of the box. This is the same process a dealer would perform, but done for you ahead of time to get you back on the road faster.
Important Post-Installation Procedures
While our programming handles the most critical step, some vehicles may require additional syncing procedures after installation. Please be aware of the following possibilities:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool must be used 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 needed to ensure correct brake light operation and traction control system performance.
Always consult a factory service manual or a qualified technician for guidance specific to your vehicle.
Guaranteed Vehicle Fitment
This computer will fit the following part numbers: 25802312, 8258023120, 15135466, 15787809
This part will fit these makes and models with these options:
- ISUZU ASCENDER 06-07 Body Control (BCM); front (fuse box side), w/o security system
- ISUZU ASCENDER 08 Body Control (BCM); front (fuse box side)
- ISUZU ASCENDER 05 Body Control (BCM); front (fuse box side), w/o security system; ID 15787809
- ENVOY 06-09 Body Control (BCM); front (fuse box side), w/o security system
- ENVOY 05 Body Control (BCM); front (fuse box side), w/o security system; ID 15787809
- ENVOY XL 06 Body Control (BCM); front (fuse box side), w/o security system
- ENVOY XL 05 Body Control (BCM); front (fuse box side), w/o security system; ID 15787809
- TRAILBLAZER 06-09 Body Control (BCM); front (fuse box side), w/o security system
- TRAILBLAZER 05 Body Control (BCM); front (fuse box side), w/o security system; ID 15787809
- TRAILBLAZER EXT 06 Body Control (BCM); front (fuse box side), w/o security system
- TRAILBLAZER EXT 05 Body Control (BCM); front (fuse box side), w/o security system; ID 15787809
- RAINIER 06-07 Body Control (BCM); front (fuse box side), w/o security system
- RAINIER 05 Body Control (BCM); front (fuse box side), w/o security system; ID 15787809
- SAAB 9-7X 06-09 Body Control (BCM); (fuse box front)
Frequently Asked Questions
Do I need to send you my old BCM?
No. This module is sold without a core charge, so you can keep your original part. There are no extra fees or return shipments to worry about.
Is this part difficult to install?
The physical installation is generally straightforward for someone with mechanical experience, as the BCM is located on the front of the interior fuse box. However, as noted above, some vehicles may require post-installation relearn procedures with a professional scan tool. If you are not comfortable with vehicle electronics, we recommend professional installation.
What information do you need from me?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it.
What happens if my airbag light comes on after installation?
This is a known possibility. It means the new BCM needs to be electronically introduced to the vehicle’s airbag system (SDM). A repair shop with a high-end diagnostic tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Will this fix my specific electrical problem?
While this Isuzu Ascender Body Control Module is the correct solution for the many common electrical faults listed above, proper vehicle diagnosis is always key. We strongly recommend you or your mechanic confirm that the BCM is the faulty component before placing an order to ensure this part resolves your issue.
How long does the programming take?
All programming is performed by our expert technicians after your order is placed and before the item is shipped. This service is included in our standard handling time, ensuring you receive a part that is ready for installation as quickly as possible.