Restore Command of Your HUMMER H2

If you’re dealing with bizarre electrical issues in your 2008-2009 HUMMER H2—like flickering lights, malfunctioning power windows, or a security system that has a mind of its own—the Body Control Module (BCM) is the likely culprit. As the central nervous system for your vehicle’s body electronics, a failing BCM can turn your rugged H2 into a source of constant frustration. This isn’t just an inconvenience; it can be a safety issue when essential components like lights or door locks behave erratically. This replacement BCM is the definitive, reliable solution to get your vehicle’s features working correctly again.

We take the guesswork and dealership hassle out of the equation. Unlike a standard part that requires expensive programming tools, this 2008-2009 HUMMER H2 BCM arrives at your door pre-programmed with the latest GM software, specifically matched to your vehicle’s VIN. This means a more straightforward installation process for both seasoned mechanics and determined DIYers. You get a part that’s ready to work, saving you time, a trip to the dealer, and significant programming fees.

Is Your HUMMER H2 Showing These Symptoms?

A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:

• ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights).
• ✔ Power windows, door locks, or mirrors working intermittently or not at all.
• ✔ The security system light is illuminated on the dash, or the vehicle won’t start.
• ✔ Dashboard gauges behaving erratically or giving false readings.
• ✔ Radio or climate control systems malfunctioning.
• ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140, U0155, or B1001.

Your Straightforward H2 BCM Installation Guide

Replacing the BCM on your H2 is a manageable job. Here’s a general guide to get you through it:

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
2. Locate the BCM: On the 2008-2009 HUMMER H2, the Body Control Module is typically located on the left-hand (driver’s side) of the firewall, inside the cabin. You may need to remove a lower dash panel for access.
3. Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
4. Install the New Module: Mount your new, pre-programmed BCM onto the bracket and securely reconnect all the electrical harnesses. Ensure they click into place.
5. Reconnect and Test: Reinstall any panels you removed, then reconnect the negative battery terminal. Start the vehicle and test all body functions—lights, windows, locks, etc.—to confirm the repair.

Important Post-Installation Notes

While this module is programmed for your vehicle, some GM security and safety systems may require a ‘handshake’ procedure after installation. Be aware of the following possibilities:

• Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
• Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct operation of the brake lights and stability control systems.
• No Core Charge: You are not required to send your old BCM back to us. There is no core charge associated with this purchase.

Verified Vehicle Compatibility

This module is a direct replacement for part number 25826124 and interchanges with a wide range of other GM part numbers. It is guaranteed to fit the following vehicles:

Frequently Asked Questions