Are you tired of chasing electrical gremlins in your GM SUV? One minute the power windows work, the next they don’t. The dashboard lights flicker randomly, or the door locks have a mind of their own. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times, and the culprit is almost always a failing Body Control Module (BCM). It’s the electronic nerve center of your vehicle’s body functions, and when it goes bad, it can cause a cascade of frustrating and unpredictable problems.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We offer a genuine solution with this GM BCM 15114669, which arrives at your doorstep pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module communicates perfectly with your SUV’s existing systems right out of the box. You get to skip the expensive trip to the dealership for programming, saving you both time and money. Simply provide your VIN at checkout, and we’ll handle the rest, loading the latest GM software for optimal performance and reliability.
Case Study: A Tricky Diagnosis
A customer brought in their 2004 Trailblazer with a complaint that was driving them crazy: the radio would turn on and off by itself, and the interior dome lights would stay on, draining the battery overnight. They had already replaced the battery and checked all the fuses. After connecting my scan tool, I found no communication codes with the BCM. However, by monitoring live data, I could see erratic voltage readings from the door ajar switches, even when all doors were securely closed. This pointed directly to an internal fault in the BCM. After installing a VIN-programmed module like this one, all the phantom electrical issues vanished. It’s a classic failure on these platforms, and a pre-programmed BCM is the most efficient fix.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t work at all.
- ✔ Instrument cluster gauges behaving erratically or not working.
- ✔ The security or anti-theft system preventing the vehicle from starting.
- ✔ False warning lights on the dashboard, such as a door ajar or airbag light.
- ✔ Communication error codes (U-codes) when scanned with a diagnostic tool.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a confident DIYer. It’s typically located on the side of the interior fuse box. Follow these general steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait about 10 minutes to ensure all systems are powered down.
- Locate the BCM: On most of these models (like the Trailblazer and Envoy), you’ll find the BCM attached to the side of the fuse panel, usually under the driver’s side of the dashboard or under the rear seat.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unclip or unbolt the old BCM from its mounting location.
- Install the New Module: Mount your new, pre-programmed GM BCM 15114669 in the same position as the old one. Securely reconnect all electrical connectors, ensuring they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, and wipers—to confirm proper operation.
Important Post-Installation Notes
While our programming handles the majority of the setup, some vehicles may require a couple of quick relearn procedures. This is normal. A professional-grade scan tool may be needed for these steps:
- Airbag System Sync: If your airbag light is on after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary for the brake lights and traction control to function correctly.
Our Promise: This module is a direct replacement for part numbers 15122670, 15065293, 15114669, 15191621, and 9352135. Plus, there is no core charge, so you can keep your original module.
Verified Vehicle Compatibility
This Body Control Module is a guaranteed fit for the following vehicles without a factory security system (unless otherwise noted). Please verify your part number or contact us with your VIN to ensure compatibility.
- 2002-2005 Chevrolet Trailblazer & EXT
- 2002-2005 GMC Envoy, XL, & XUV
- 2002-2004 Oldsmobile Bravada
- 2004-2005 Buick Rainier
- 2003-2005 Isuzu Ascender
- 2005 Saab 9-7X
Frequently Asked Questions
Why do you need my VIN number?
We require your VIN to program the BCM with the specific software and calibrations for your vehicle’s exact configuration. This ensures all features work correctly and makes the installation process a plug-and-play experience, avoiding a costly trip to the dealer.
Is this a difficult part to install myself?
For most DIYers with basic tools, this is a very manageable installation. The BCM is typically easy to access near the interior fuse panel. The most significant benefit of our service is that the difficult programming part is already done for you.
Will this GM BCM 15114669 fix my no-start problem?
If the no-start is caused by the BCM not recognizing the key or disabling the starter relay, then yes, a new programmed BCM can resolve the issue. However, no-start conditions can have many causes, so proper diagnosis is always recommended.
What if my airbag light comes on after I install it?
This is a possibility and is not a sign of a defective part. It simply means the new BCM needs to be electronically ‘introduced’ to the airbag module (SDM). This requires a ‘Setup SDM Primary Key’ procedure with a bidirectional scan tool, which a local mechanic can perform quickly.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your old module, which saves you the time and expense of return shipping.