Restore Full Functionality to Your GM Workhorse
Is your 2004-2007 GMC Savana 3500 Van suffering from baffling electrical problems? As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can bring a reliable work vehicle to a standstill. One minute the wipers work, the next they don’t. The A/C blower motor has a mind of its own, and you’re chasing phantom electrical draws that drain your battery. This isn’t just an annoyance—it’s downtime that costs you money. This replacement Body Control Module, equivalent to part number 15136877, is the definitive solution to restore your van’s critical electronic systems.
This module is the central command for your vehicle’s body electronics. It governs everything from the power windows and door locks to the interior lights, security system, and HVAC controls. When it fails, it can create a cascade of frustrating and hard-to-diagnose symptoms. Our module arrives at your door pre-programmed to your van’s specific Vehicle Identification Number (VIN), eliminating the need for expensive dealership visits for programming. It’s a true plug-and-play fix designed for the professional mechanic and the savvy DIYer alike. Get your 2004-2007 Savana 3500 BCM back to factory-spec performance and reliability.
Case Study: A Tricky Diagnosis
A local contractor brought in his ’06 Savana 3500. The complaint was intermittent no-start and the security light flashing randomly. He’d already replaced the battery and checked the ignition switch. After connecting my scanner, I saw a slew of communication error codes (U-codes) pointing to the BCM. These modules are notorious for internal solder joint failures, causing intermittent ground issues. We installed one of our VIN-programmed BCMs, and in less than 15 minutes, the van started every time and all electrical functions were restored. It’s a common failure I’ve fixed on hundreds of these GM vans and trucks.
Is Your GM Van Showing These Symptoms?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, a failing module is the likely culprit:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC blower motor or climate controls working erratically or not at all.
- ✔ The security system preventing the vehicle from starting (Passlock issues).
- ✔ An illuminated Airbag (SRS) light, often with a DTC like B1001 (Option Configuration Error).
- ✔ Headlights, taillights, or interior dome lights staying on or not turning on.
- ✔ Unpredictable windshield wiper operation.
A Straightforward Guide to Installation
Replacing the 2004-2007 Savana 3500 BCM is a simple job that typically takes just a few minutes. For Savana and Express vans, the module is located behind a panel in the center of the dash, near the floor.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s systems.
- Locate the BCM: On Savana/Express vans, find the module in the center dash area. It’s a black box with several multi-pin connectors. On trucks and SUVs, it’s typically under the driver’s side dash, near the steering column.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have release tabs that need to be pressed. Unbolt or unclip the old module and remove it.
- Install the New BCM: Secure the new, pre-programmed BCM in place and firmly reconnect all electrical connectors until they click.
- Final Steps: Reconnect the battery terminal. Start the vehicle to confirm that all functions are restored. In some cases, if the airbag light remains on, a ‘Setup SDM Primary Key’ procedure may be needed with a professional scan tool.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15136877 and is interchangeable with several other part numbers, including 15116066, 15136225, and 15198116. It fits a wide range of General Motors vehicles. While this page focuses on the 2004-2007 Savana 3500 BCM, please verify your specific model in the list below:
- Chevrolet Avalanche 1500/2500 (2002-2006)
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Suburban 1500/2500 (2003-2006)
- Chevrolet Tahoe (2003-2006)
- Chevrolet Express 1500/2500/3500 Van (2004-2007, w/ opt PRP)
- GMC Sierra 1500/2500/3500 & Denali (2003-2007 Classic)
- GMC Yukon & Yukon XL 1500/2500 (2003-2006)
- GMC Savana 1500/2500/3500 Van (2004-2007, w/ opt PRP)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
Frequently Asked Questions
What does ‘VIN Programmed’ mean for me?
It means we load your vehicle’s specific VIN and factory settings into the module before shipping. This makes installation simple—no expensive trips to the dealer for programming are required. It’s ready to install right out of the box.
Is this part difficult to install myself?
Not at all. For most DIYers with basic tools, this is a 5-10 minute job. The BCM is easily accessible on most of these GM trucks and vans, usually under the dash.
My airbag light is on. Will this fix it?
A faulty BCM can cause the airbag light to come on. Replacing it often solves the issue. However, if the light stays on after installation, it may need an ‘SDM Key Relearn’ procedure performed with a professional scan tool to sync the new BCM with the airbag system.
What if I have other warning lights on after installation?
Occasionally, a procedure like the Brake Pedal Position Relearn may be needed. This is model-dependent. We always recommend consulting a factory service manual or a qualified technician if you encounter any post-installation issues.
Is there a core charge?
No. There is no core charge for this part. You can keep your old module without any hassle or need to return it.