Tired of Unpredictable Electrical Problems in Your HUMMER H2?
As a technician with over two decades of experience, I’ve seen countless GMT800 platform vehicles, including the formidable HUMMER H2, roll into my bay with baffling electrical issues. The culprit is often a failing Body Control Module (BCM). This isn’t just an inconvenience; it’s the central command for your vehicle’s comfort and security features. When it fails, you might experience everything from a non-responsive HVAC system on a hot day to a vehicle that refuses to start. This replacement 2003-2007 HUMMER H2 BCM, part number 15137395, is the definitive solution to restore your truck’s electronic stability and performance.
We take the guesswork and dealership hassle out of the equation. Each module is expertly programmed to your vehicle’s specific VIN before shipping. This ensures it communicates flawlessly with your H2’s other systems right out of the box. You get a reliable, plug-and-play component that resolves those frustrating, intermittent problems for good.
From the Diagnostic Bay: The H2 That Played Possum
A customer brought in his ’05 H2, completely frustrated. The security light was flashing, the radio would cut out, and sometimes the power locks wouldn’t work. He’d already replaced the battery and alternator on the advice of another shop. After connecting my scanner, I saw a slew of U-series communication codes and a B1001 code. These are classic signs of a BCM failure, not a charging system issue. The internal logic of the original BCM was failing, causing it to send corrupt data across the network. We installed a VIN-programmed BCM, and within 10 minutes, every single issue was resolved. It’s a common misdiagnosis that can cost owners hundreds in unnecessary parts.
Is Your H2 Showing These Electrical Gremlins?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your BCM is the root cause:
- ✔ The security or anti-theft system acts up, causing a no-start condition.
- ✔ Power windows, door locks, or interior lights work intermittently or not at all.
- ✔ The HVAC blower motor or climate controls are unresponsive.
- ✔ Your scan tool shows communication DTCs (Diagnostic Trouble Codes) or a specific BCM code like B1001.
- ✔ The airbag warning light is illuminated on the dash.
- ✔ Wipers operate erratically or won’t turn off.
Your 5-Minute BCM Installation Guide
One of the best features of this module is its straightforward installation. You don’t need to be a master mechanic to get your H2 back in top shape. The entire process typically takes less time than a coffee break.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the BCM: On the HUMMER H2, the BCM is located on the left-hand (driver’s) side of the dashboard, typically above and to the left of the brake pedal. It’s a black box with several multi-pin connectors.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Unbolt or unclip the old module from its mounting bracket and set it aside.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors—you’ll hear a click as they lock into place.
- Power Up: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair.
Post-Installation Note: In some cases, an airbag light may remain on. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules. This is a simple electronic handshake that restores communication.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 15137395 and is interchangeable with a wide range of other GM part numbers, including 15116066, 15137394, 15198116, and more. It is guaranteed to fit the following vehicles:
CADILLAC ESCALADE, ESV, EXT 2003-2006 (under steering column)
CHEVROLET AVALANCHE 1500/2500 2003-2006 (under steering column)
CHEVROLET SILVERADO & GMC SIERRA 1500/2500/3500 2003-2007 (Classic Body) Crew Cab (under steering column)
CHEVROLET SUBURBAN & GMC YUKON/XL 1500/2500 2003-2006 (under steering column)
CHEVROLET EXPRESS & GMC SAVANA VANS 2004-2007 (center dash, w/ tradesman pkg)
Frequently Asked Questions
Do I need to have this BCM programmed by the dealer?
No. We handle all the programming for you. Simply provide your vehicle’s VIN at checkout, and the module will arrive ready for plug-and-play installation, saving you time and money.
Is there a core charge for my old part?
Absolutely not. There is no core charge on this BCM. You can keep your old part or dispose of it without any hassle.
What tools do I need for installation?
For most installations, you’ll only need a basic socket set to disconnect the battery and potentially unbolt the module bracket. No special electronic tools are required for the physical swap.
My airbag light is on after installing the new BCM. What should I do?
This is a normal security measure. The new BCM needs to be electronically introduced to the airbag’s Sensing and Diagnostic Module (SDM). A repair shop with a capable bi-directional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to clear the light.
Will this fix my intermittent no-start problem?
If your no-start issue is related to the Passlock security system (a common BCM-controlled function), then yes, this module is the correct fix. It will restore proper communication and allow the vehicle to start reliably.