Fix Annoying Electrical Problems in Your GM Van or Truck
If you’re dealing with bizarre electrical issues in your 2004-2007 Chevrolet Express 3500, the Body Control Module (BCM) is often the culprit. As the central command center for your vehicle’s body electronics, a failing BCM can cause a cascade of frustrating problems, from a dead climate control system to a vehicle that won’t start. This OEM-quality replacement, part number 10367690, is the reliable solution you need. We pre-program it to your van’s specific VIN, so it arrives ready for a simple, plug-and-play installation, getting your workhorse back on the road without a costly trip to the dealership.
Is Your Vehicle Showing These Symptoms?
- ✔ The HVAC blower motor works intermittently or not at all.
- ✔ Your airbag warning light is on, possibly with a B1001 diagnostic trouble code.
- ✔ Power windows, door locks, or interior/exterior lights are acting erratically or have stopped working completely.
- ✔ The security system is malfunctioning, preventing the engine from starting.
- ✔ You’re chasing confusing electrical gremlins and multiple body-related DTCs.
Case Study: A Tricky Diagnosis
A customer brought in his 2006 Express 3500 work van last month. The complaint was ‘the AC is dead.’ His mechanic had already replaced the blower motor and resistor with no success. After a quick scan, I saw a dozen communication codes pointing to the BCM. In my shop, I’ve seen hundreds of these BCMs fail due to internal circuit board corrosion, especially in work vans that see harsh conditions. Once we installed our VIN-programmed 2004-2007 Express 3500 BCM, not only did the HVAC come back to life, but his intermittent dome light and door lock issues vanished too. It’s a perfect example of how one part can solve multiple, seemingly unrelated problems.
A Straightforward Guide to Installation
Getting your van back in service is easier than you think. For the Express and Savana vans, the BCM is located in the center of the dash. The entire process typically takes less than 15 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: Find the BCM in the center dash area. You may need to remove a lower dash panel for access.
- Swap the Part: Carefully unplug the electrical connectors from the old BCM. Unbolt or unclip the old module and secure the new one in its place. Reconnect the wiring harnesses.
- Reconnect Power: Re-attach the negative battery terminal.
- Final Steps: While the module is plug-and-play for most functions, some vehicles require a ‘Setup SDM Primary Key in BCM’ procedure with a capable scan tool to clear the airbag light. A brake pedal position sensor recalibration may also be necessary.
Guaranteed Fitment for Your GM Vehicle
This BCM is a direct replacement for part number 10367690 and is interchangeable with several other part numbers, including 15116066, 15136225, and 15198116. It is verified to fit the following models (please confirm your specific options):
- Chevrolet Express 1500/2500/3500 Van (2004-2007): With commercial tradesman package (opt PRP), located in center dash.
- GMC Savana 1500/2500/3500 Van (2004-2007): With commercial tradesman package (opt PRP), located in center dash.
- Chevrolet Silverado & GMC Sierra Trucks (2003-2007 Classic): Crew Cab models, located under the steering column.
- Chevrolet Avalanche, Suburban, Tahoe (2003-2006): Located under the steering column.
- GMC Yukon / Yukon XL (2003-2006): Located under the steering column.
- Cadillac Escalade / ESV / EXT (2003-2006): Located under the steering column.
- Hummer H2 (2003-2007): Located in the LH dash area.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. This ensures it is ready for installation right out of the box, saving you time and money.
What is the main cause of failure for these BCMs?
From our experience, the most common cause of failure is moisture intrusion or voltage spikes, which damage the delicate internal circuit boards over time.
Will this fix my airbag light?
If the airbag light is caused by a BCM communication error (like DTC B1001), this part will resolve the root cause. However, you will still need to perform the ‘Setup SDM Primary Key’ procedure with a scan tool to turn off the light after installation.
Is this a difficult part for a DIYer to replace?
Not at all. For most DIYers with basic tools, this is a very straightforward job. The location in the Express/Savana vans is accessible, and the physical swap is simple. The only potential extra step is needing a scan tool for post-install resets.
What if I have a no-start problem?
A faulty BCM can absolutely cause a no-start condition by failing to recognize the key’s security chip (Passlock/VATS system). Replacing the BCM often resolves these security-related starting issues.