Restore Your Truck’s Electrical System with a Plug-and-Play BCM
Are you tired of chasing electrical gremlins in your Chevy Silverado or GMC Sierra? Flickering lights, a possessed radio, power windows with a mind of their own, or an HVAC system that won’t cooperate are classic signs of a failing Body Control Module (BCM). As the central command center for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating and hard-to-diagnose issues. This OEM-quality Body Control Module, equivalent to part number 15137395, is the definitive solution, arriving expertly programmed to your vehicle’s specific VIN for a true plug-and-play installation.
A Technician’s Notebook: The Phantom Battery Drain
I had a 2006 Silverado 1500 in the bay last month that was a real head-scratcher for the owner. He’d replaced the battery twice and the alternator once, but the truck would still be dead after sitting for a day. A parasitic draw test showed a significant current pull, but it was intermittent. After isolating circuits, we traced the draw back to the BCM. It was failing to put various accessory circuits to sleep after shutdown, slowly draining the battery overnight. Swapping in a pre-programmed BCM like this one solved the problem in under 10 minutes. The customer saved hundreds by avoiding a dealership diagnosis and programming fee, and his truck has started reliably ever since. These modules are notorious for this exact failure.
Is Your Silverado Showing These Symptoms?
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ HVAC blower motor or climate controls working erratically or not at all.
- ✔ The security system acting up, causing no-start conditions or false alarms.
- ✔ An airbag warning light on the dash, often with a DTC like B1001 (Option Configuration Error).
- ✔ Unpredictable behavior from windshield wipers or exterior lighting.
- ✔ Communication errors with other modules on the vehicle’s data network.
This isn’t just an inconvenience; it can be a safety issue. A reliable 2003-2007 Silverado 1500 BCM ensures your lights, locks, and safety systems function exactly as the factory intended. Our module is flashed with the latest GM software updates for your VIN, correcting common factory bugs and ensuring optimal performance right out of the box.
A Straightforward Guide to Installation
- Safety First: Always disconnect the negative terminal on your truck’s battery before starting any electrical work.
- Locate the BCM: On most Silverado, Sierra, and SUV models, the BCM is located under the driver’s side dashboard, near the steering column. It’s a black plastic box with several large multi-pin connectors.
- Swap the Module: Carefully depress the locking tabs on each electrical connector and pull them straight out. Remove the fasteners holding the old BCM in place. Install the new module and securely reconnect all connectors—they are color-coded and keyed to only fit in their correct positions.
- Reconnect Power: Re-attach the negative battery terminal. The vehicle will power up with the new BCM fully active.
- Post-Install Checks: Start the vehicle and test all functions: lights, windows, locks, wipers, and HVAC. In some cases, an airbag light may appear. This requires a ‘Setup SDM Primary Key’ procedure with a bi-directional scan tool. A brake pedal position relearn may also be needed on certain models to ensure proper brake light operation.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15137395 and other interchangeable numbers. It is guaranteed to fit the following vehicles (specifically for Crew Cab models where noted):
AVALANCHE 2500 02-06 (under steering column)
CADILLAC ESCALADE / ESV / EXT 03-06 (under steering column)
HUMMER H2 03-07 (LH dash)
CHEVROLET SILVERADO 1500 PICKUP 03-07 (Crew Cab, ’07 Classic)
CHEVROLET SILVERADO 2500 PICKUP 03-07 (Crew Cab, ’07 Classic)
CHEVROLET SILVERADO 3500 PICKUP 03-07 (Crew Cab, ’07 Classic)
GMC SIERRA 1500 PICKUP 03-07 (Crew Cab, ’07 Classic)
GMC SIERRA 2500 PICKUP 03-07 (Crew Cab, ’07 Classic)
GMC SIERRA 3500 PICKUP 03-07 (Crew Cab, ’07 Classic)
GMC SIERRA DENALI 03-07 (’07 Classic)
CHEVROLET SUBURBAN 1500/2500 03-06 (under steering column)
CHEVROLET TAHOE 03-06 (under steering column)
GMC YUKON / YUKON XL 1500/2500 03-06 (under steering column)
EXPRESS/SAVANA VANS 04-07 (center dash, w/ commercial tradesman package opt PRP)
Frequently Asked Questions
What exactly does the Body Control Module do on my Silverado?
The BCM is the brain for most of your truck’s non-engine related electronics. It controls power windows, door locks, the security system, interior and exterior lighting, the HVAC system (heater and A/C), and windshield wipers. When it fails, you get strange electrical behavior across these systems.
Is this BCM truly plug-and-play?
Yes. We program the module to your vehicle’s VIN before shipping. This means it has all the correct software and settings for your truck’s specific options. You simply install it, and it works without requiring an expensive trip to the dealership for programming.
What if my airbag light is on after installation?
This can happen occasionally. The BCM and the airbag system (SDM) need to communicate securely. If the light stays on, a technician will need to perform a ‘Setup SDM Primary Key in BCM’ procedure with a professional-grade scan tool to sync the two modules. This is a quick procedure for any competent repair shop.
Do I need to send my old BCM back?
No. There is absolutely no core charge for this part. You can keep your old module or dispose of it responsibly.
Will this fix my intermittent no-start problem?
If your no-start is related to the factory security system (Passlock/VATS), a failing BCM is a very common cause. This programmed module will restore the security handshake with your ignition system, resolving security-related starting issues.