Restore Control and Reliability to Your GM Vehicle
Are you chasing electrical gremlins in your truck or van? Flickering interior lights, power windows with a mind of their own, a security light that won’t turn off, or a radio that cuts out randomly are all classic signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s comfort and convenience features. When it starts to fail, it can make driving a frustrating and unpredictable experience. Stop throwing parts at the problem and get the definitive solution.
This is a direct-fit replacement 2003-2007 GM BCM, part number 15198115. The best part? We take the guesswork and dealer hassle out of the equation. Simply provide us with your vehicle’s VIN at checkout, and our technicians will program the module with the latest GM software specifically for your truck or van. It arrives at your door ready for installation, saving you a costly trip to the dealership and hours of diagnostic headaches.
A Technician’s Notebook
A customer brought in his 2005 Silverado 1500 last month with a list of bizarre issues. The dome light would stay on, the driver’s power window worked only when it wanted to, and the ‘Security’ light on the dash was constantly illuminated, sometimes preventing the truck from starting. He’d already replaced the battery and checked fuses. After a quick scan, we saw multiple communication loss codes pointing to the BCM. These modules are notorious for internal solder joint failures over time, causing exactly this kind of electrical chaos. We installed one of our pre-programmed BCMs, performed the quick security and airbag relearn procedures, and had him back on the road in under an hour with all issues resolved. This part is a common-sense fix for these exact symptoms.
Is Your GM Truck or Van Showing These Symptoms?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your Body Control Module needs replacement:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The vehicle’s security system acting erratically or preventing the engine from starting.
- ✔ The radio or instrument cluster gauges behaving strangely.
- ✔ False warning lights on the dashboard (e.g., door ajar, security light).
- ✔ Problems with the keyless entry remote.
A Straightforward Guide to Your BCM Replacement
Installing your new 2003-2007 GM BCM is a manageable job for a DIY enthusiast. While the exact location varies slightly between trucks and vans, the process is similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electrical components.
- Locate the BCM: On Silverado and Sierra pickups, it’s typically found under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s usually behind the center dash panel.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Critical Final Steps: After installation, two procedures are required. You must perform the ‘Setup SDM Primary Key in BCM’ procedure with a capable scan tool to clear the airbag light. Additionally, some vehicles may require a Brake Pedal Position Sensor recalibration to ensure proper brake light function and cruise control operation.
Will This Fit My Vehicle?
This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit the following models (specific options may apply):
Chevrolet Silverado & GMC Sierra Pickups (1500, 2500, 3500) (2003-2007 Classic Body Style)
Chevrolet SSR (2003-2006)
Note: Primarily for models excluding Crew Cab and certain commercial packages. Please verify your part number or contact us with your VIN to ensure compatibility.
Frequently Asked Questions
Do I need to do anything after installing this BCM?
Yes. Because this is a critical security and safety component, you must perform a security relearn procedure (often a simple 10-30 minute key cycle process) and an airbag system relearn (‘Setup SDM Primary Key’) using a bi-directional scan tool. Some vehicles may also need a brake pedal position sensor calibration.
What happens if I don’t provide my VIN?
We cannot ship the module without your VIN. The programming is essential for the BCM to communicate with your vehicle’s other computers and options. We will contact you after your purchase to get the VIN.
Is this a difficult part to replace myself?
For someone with basic mechanical skills, the physical replacement is straightforward. It’s typically held in by a few bolts or clips and is accessible under the dash. The most important part is having access to a proper scan tool for the final relearn procedures.
Will this 2003-2007 GM BCM fix my no-start problem?
It can. If the BCM is failing, it can incorrectly activate the vehicle’s anti-theft system (Passlock/Passkey), which prevents the engine from starting. If your ‘Security’ light is on, a faulty BCM is a very likely cause.
What is the difference between a BCM and an ECU/PCM?
The BCM (Body Control Module) manages body electronics like lights, windows, locks, and security. The ECU/PCM (Engine/Powertrain Control Module) manages engine and transmission functions. They are separate computers that communicate with each other.