Are you chasing electrical gremlins in your GM SUV? Intermittent power windows, flickering interior lights, or a battery that dies overnight can be incredibly frustrating. As a technician with over two decades of experience, I’ve seen these exact issues countless times. More often than not, the culprit is a failing Body Control Module (BCM), the central hub for your vehicle’s body electronics. This isn’t just an inconvenience; a faulty BCM can affect security, lighting, and even leave you stranded. Stop throwing parts at the problem and get the definitive fix.
This is a direct-replacement GM Body Control Module 9352135, the reliable solution to restore your vehicle’s electronic functions. The best part? We handle the most difficult step for you. Before we ship it, we program the module to your vehicle’s specific VIN, loading it with the latest GM-certified software. This means no expensive trip to the dealership for programming. It arrives at your door ready for installation, saving you time and hundreds of dollars in labor and programming fees. Plus, there’s no core charge, so you can keep your old part without any hassle.
Common Signs of a Failing BCM
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights staying on, flickering, or failing to turn on.
- ✔ The security system acting up, causing alarm or starting issues.
- ✔ A persistent parasitic battery drain that leaves you with a dead battery.
- ✔ Instrument cluster gauges behaving strangely or warning lights appearing without cause.
- ✔ Communication loss trouble codes, such as U-series codes, stored in the system.
A Technician’s Notebook: The Trailblazer That Wouldn’t Sleep
A customer brought in a 2004 Trailblazer with a classic complaint: a dead battery every morning. They had already replaced the battery and alternator. My diagnostic process started with a parasitic draw test, which revealed a significant power drain even after the vehicle was off for 30 minutes. By pulling fuses one by one, I isolated the draw to the BCM circuit. The module wasn’t properly entering its ‘sleep mode,’ keeping other systems active all night. Installing a VIN-programmed GM Body Control Module 9352135 didn’t just fix the draw; it also resolved the flickering dome light the owner had learned to live with. It’s a perfect example of how one failing component can cause multiple, seemingly unrelated symptoms.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most of these GM SUVs, the BCM is located on or near the interior fuse panel, typically under the driver’s side of the dashboard or under the rear seat.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. Note their orientation. Then, unbolt or unclip the module from its mounting bracket and remove it.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect the electrical connectors securely, ensuring they click into place.
- ✔ Reconnect Battery: Reattach the negative battery terminal.
- ✔ Post-Installation Checks: Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, and wipers. Start the vehicle. Note that some post-installation procedures may be required.
Important Post-Installation Information
After installing your new BCM, your vehicle may require one or more of the following procedures for full functionality. This is a normal part of the process.
- Airbag System Sync: If your 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 system.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor relearn might be necessary. This can often be done with a capable diagnostic tool.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 15122670, 15065293, 15114669, 15191621, and 9352135, and fits the following vehicles:
- 2002-2005 Chevrolet Trailblazer & Trailblazer EXT
- 2002-2005 GMC Envoy, Envoy XL, & Envoy XUV
- 2002-2004 Oldsmobile Bravada
- 2004-2005 Buick Rainier
- 2003-2005 Isuzu Ascender
- 2005 Saab 9-7X
Note: Please check the fitment details in the original listing to confirm specific options for your vehicle, such as ‘w/o security system’.
Frequently Asked Questions
Frequently Asked Questions
Do I need to send you my VIN?
Yes, providing your Vehicle Identification Number (VIN) is essential. We use it to program the module with the correct software and updates for your specific vehicle, ensuring a plug-and-play installation.
Is this a difficult part to install myself?
For someone with basic mechanical skills, this is a very manageable job. The BCM is typically accessible near the fuse box. Since we pre-program the unit, you eliminate the most complex part of the replacement process.
What is a core charge?
A core charge is a deposit that is returned when you send back your old part. We make it simple: there is NO core charge on this BCM. You can keep your old module.
Why is my airbag light on after installation?
This is normal for some vehicles. The new BCM needs to be electronically ‘introduced’ to the airbag control module (SDM). This requires a ‘Setup SDM Primary Key’ procedure with a professional-grade scan tool to sync the systems and turn off the light.
Will this fix my specific electrical problem?
The BCM controls dozens of functions, and a failing one is a very common cause of strange electrical issues in these trucks. This part is designed to resolve problems with lights, locks, windows, and other body electronics. If you’ve diagnosed the issue to the BCM, this is the correct solution.