Restore Full Electronic Functionality to Your GM SUV
Is your 2002-2005 GMC Envoy, Chevy Trailblazer, or other GMT360 platform SUV suffering from bizarre electrical issues? The Body Control Module, or BCM, is the central command center for your vehicle’s body electronics. It manages everything from your power windows and door locks to your interior lighting and security system. When it begins to fail, it can cause a cascade of frustrating and seemingly unrelated problems. This replacement Envoy Body Control Module is the definitive solution to restore your vehicle’s electronic systems to perfect working order.
Unlike a standard part from a salvage yard or local parts store, this BCM arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest official GM software updates, ensuring it communicates flawlessly with your vehicle’s other computers right out of the box. This critical programming step eliminates the need for an expensive trip to the dealership for coding, saving you time, money, and hassle.
Common Symptoms of a Failing Envoy Body Control Module
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, a failing Body Control Module is the most likely culprit:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome lights or exterior lamps staying on or not turning on at all.
- ✔ The security system or horn activating randomly.
- ✔ Instrument cluster gauges behaving erratically or warning lights appearing for no reason.
- ✔ Windshield wipers operating on their own or not responding to the switch.
- ✔ HVAC (heater and A/C) controls not working correctly.
- ✔ Communication failures when trying to use a diagnostic scan tool.
Simple Installation and Post-Install Syncing
This module is designed for a straightforward installation, typically located behind the driver’s side of the dash or integrated with the interior fuse panel. Because it comes pre-programmed, the most difficult part of the job is already done. However, on certain vehicles, additional synchronization procedures may be required after installation to ensure all systems communicate correctly.
- Airbag System Sync: If your airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional bidirectional scan tool. This syncs the new BCM with the airbag’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: To ensure proper brake light operation and stability control function, a brake pedal position sensor recalibration may be necessary. This also requires a capable diagnostic tool.
We provide this module with no core charge, so you can keep your original part without the hassle of shipping it back.
Guaranteed Fitment
This BCM is a direct replacement for the following part numbers: 15122670, 15065293, 15114669, 15191621, and 9352135. It is compatible with a wide range of GM SUVs, including:
- 2002-2005 GMC Envoy, Envoy XL, Envoy XUV
- 2002-2005 Chevrolet Trailblazer, Trailblazer EXT
- 2002-2004 Oldsmobile Bravada
- 2004-2005 Buick Rainier
- 2003-2005 Isuzu Ascender
- 2005 Saab 9-7X
Please provide your VIN upon checkout to ensure we can program the module for your specific vehicle options before shipment.
Frequently Asked Questions
Why is providing my VIN so important?
Your vehicle’s VIN allows us to program the BCM with the exact software and settings for the options your vehicle was built with, such as power seats, security system type, and more. This ensures a true plug-and-play installation and proper function of all features.
Is this part difficult to install myself?
The physical replacement is straightforward for someone with basic mechanical skills, as it’s typically just a few connectors and mounting bolts. However, be aware that post-installation procedures like the airbag sync may require a professional scan tool that most DIYers do not own.
Do I need to send my old BCM back?
No. This part is sold with no core charge. You can keep your original module without any additional fees or the need to return it.
Will this BCM fix my parasitic battery drain?
It is a very common solution for parasitic drains on these vehicles. A failing BCM can fail to ‘go to sleep’ after the ignition is off, keeping other modules awake and slowly draining the battery overnight.
What if my airbag light comes on after I install it?
This is normal on some models. The new BCM needs to be electronically ‘introduced’ to the airbag module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure using a professional-grade scan tool to sync the components and turn off the light.