Restore Full Electrical Function to Your GM SUV
Are you battling a frustrating array of electrical gremlins in your 2002-2005 Trailblazer, Envoy, or other GM SUV? Issues like erratic power windows, malfunctioning lights, or a dead instrument cluster often point to a single culprit: a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics, and when it starts to fail, it can cause widespread and unpredictable problems. This replacement Body Control Module, part number 15114669, is the definitive solution to restore your vehicle’s electronic stability and functionality.
We take the guesswork and high dealership costs out of the equation. Unlike a generic part from a salvage yard, this BCM is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures seamless integration with your SUV’s existing systems, making the installation process as straightforward as possible. Simply provide your VIN at checkout, and we handle the complex programming, loading the latest GM software updates for optimal performance.
From the Diagnostic Bay
We recently had a 2004 GMC Envoy in the shop with a classic case of BCM failure. The customer reported that the interior lights would stay on, draining the battery overnight, and the power door locks worked only intermittently. They had already replaced the battery and checked every fuse with no success. A diagnostic scan revealed multiple communication loss codes with the BCM. Instead of a complex wiring issue, the problem was the module itself. Installing a VIN-programmed Trailblazer Body Control Module like this one resolved all the symptoms in under an hour, saving the customer from further diagnostic headaches and unnecessary parts replacement.
Is Your Trailblazer Body Control Module Failing?
A faulty BCM can manifest in numerous ways, often making you feel like your vehicle is haunted. Look out for these common symptoms that indicate it’s time for a replacement:
- ✔ Power windows, mirrors, or door locks operating erratically or not at all.
- ✔ Interior dome lights or exterior lamps staying on or failing to turn on.
- ✔ The security system acting up, such as the alarm sounding for no reason.
- ✔ Intermittent operation of the radio, climate controls, or instrument panel gauges.
- ✔ The horn sounding unexpectedly or not working when pressed.
- ✔ “Service Vehicle Soon” or other warning lights illuminated on the dashboard.
- ✔ Communication errors when a diagnostic scan tool is connected.
Plug-and-Play Solution with VIN Programming
The biggest hurdle in replacing a BCM is the need for specialized programming. This module eliminates that step for you. We use your VIN to flash the unit with the precise software and calibrations your vehicle requires. This means no expensive trip to the dealership for programming. While the installation is straightforward, please be aware of potential post-installation procedures that may be necessary.
Post-Installation Requirements
After installing your new BCM, some vehicles may require one or more of the following relearn or synchronization procedures. These can typically be performed by a qualified technician with a professional-grade scan tool.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync 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 recalibration may be necessary on some models.
This unit is a direct replacement for multiple part numbers, including 15122670, 15065293, 15114669, 15191621, and 9352135. It fits a wide range of GM vehicles from 2002-2005, including the Chevrolet Trailblazer & EXT, GMC Envoy, XL & XUV, Oldsmobile Bravada, Buick Rainier, Isuzu Ascender, and Saab 9-7X. Please verify your part number and vehicle fitment to ensure compatibility.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We pre-program this module to your vehicle’s VIN before we ship it to you. It arrives ready for installation, saving you the time and expense of a dealership visit.
Where is the BCM located on my 2003 Trailblazer?
On most GMT360 platform vehicles like the Trailblazer, Envoy, and Bravada, the BCM is integrated with the front interior fuse box, typically located on the driver’s side of the center console or under the rear seat.
What information do you need from me to program it?
We require your vehicle’s 17-digit Vehicle Identification Number (VIN). Please provide it during or after your purchase to ensure we can program the module correctly for your specific vehicle options.
What if my airbag light turns on after I install this part?
This is a known possibility. It means the new BCM needs to be electronically ‘introduced’ to the airbag’s computer (SDM). A technician with a capable scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge? Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.