Restore Full Functionality to Your GM Truck or Van
Are you chasing down frustrating electrical gremlins in your GM vehicle? Flickering interior lights, power windows that have a mind of their own, or a security light that prevents your engine from starting are all classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing issues. This isn’t just an inconvenience; it can affect vehicle security and safety systems. We offer a reliable, direct-fit solution with this 2003-2007 GM BCM, pre-programmed specifically for your vehicle.
Case Study: A Tricky Diagnosis
Just last month, a 2006 Silverado 2500 was towed into the shop. The owner was at his wit’s end. The truck would randomly refuse to start, the radio would cut out, and the power door locks worked intermittently. He had already replaced the battery and checked the alternator. After connecting my scan tool, I found a slew of communication error codes pointing towards the BCM. These modules are notorious for internal corrosion on the circuit board, leading to exactly these kinds of unpredictable problems. By installing a VIN-programmed BCM, we restored all functions perfectly on the first try, saving the customer from endless diagnostic fees and the high cost of a dealership repair.
Is Your Truck or Van Showing These Signs?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely culprit:
- ✔ Erratic or non-functional power windows, locks, or mirrors.
- ✔ Interior dome lights or dashboard lights flickering or staying on.
- ✔ The security or anti-theft system light is illuminated, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Inconsistent operation of windshield wipers.
- ✔ False warnings on the driver information center (DIC).
The Simple, Programmed Solution
Forget about expensive dealership visits and additional programming fees. The biggest hurdle in replacing a BCM is the software. We handle that for you. Simply provide us with your vehicle’s 17-digit VIN during checkout, and our technicians will flash this 2003-2007 GM BCM with the latest GM-certified software specific to your truck or van. This ensures that all factory options your vehicle came with will work correctly right out of the box. It’s the most efficient way to get your vehicle back to 100%.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a DIYer with basic tools. Follow these general steps to get back on the road. Note: The BCM is typically located under the steering column on trucks or in the center dash area on vans.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On Silverado/Sierra models, it’s usually mounted to a bracket under the driver’s side dashboard. On Express/Savana vans, it’s often behind the center dash trim.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM and securely reconnect all electrical harnesses. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Post-Installation Procedures: After installation, a couple of system initializations are required. A qualified scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ to ensure the airbag system communicates correctly and extinguish the warning light. Some vehicles may also require a Brake Pedal Position Sensor recalibration.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15747545 and also interchanges with the following part numbers: 15167329, 15194169, 15136224, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit the following models:
- Chevrolet Silverado 1500/2500/3500: 2003-2007 (Classic body style, excluding Crew Cab models)
- GMC Sierra 1500/2500/3500: 2003-2007 (Classic body style, excluding Crew Cab models)
- Chevrolet Express 1500/2500/3500 Van: 2003-2007 (Excluding commercial tradesman package on 04-07)
- GMC Savana 1500/2500/3500 Van: 2003-2007 (Excluding commercial tradesman package on 04-07)
- Chevrolet SSR: 2003-2006
Please verify your part number and check the fitment notes to ensure this is the correct 2003-2007 GM BCM for your specific vehicle configuration.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer in your vehicle that controls and monitors a wide range of electronic accessories not related to the engine, such as power windows, locks, lights, wipers, security system, and more.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings for your vehicle’s specific options and features, ensuring a seamless, plug-and-play installation.
Is this part difficult to install myself?
The physical replacement is straightforward for most DIYers with basic tools. However, post-installation procedures like the airbag system reset require a professional scan tool. We recommend reviewing the full process before starting.
Will this fix my ‘Security’ light issue?
Yes, a faulty BCM is one of the most common causes of a persistent security light and a no-start condition in these GM vehicles. This programmed module is designed to resolve that communication failure.
What happens if I don’t do the post-installation procedures?
If you don’t perform the ‘Setup SDM Primary Key’ procedure, the airbag warning light will likely remain on. The brake pedal recalibration ensures proper brake light function and stability control performance, so it is a critical safety step if required for your vehicle.