Restore Your Pontiac’s Electrical Stability
Are you dealing with bizarre electrical issues in your Pontiac G8? Flickering interior lights, a security system that acts up, power windows with a mind of their own, or a battery that drains overnight are all classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause widespread and frustrating problems. This isn’t just an annoyance; it’s a reliability issue that can leave you stranded. This replacement BCM, part number 25847589, is the definitive solution to restore full functionality and peace of mind.
The Power of Our Cloning Service
Forget about expensive trips to the dealership for programming. Our unique cloning service makes this repair straightforward and cost-effective. Here’s how it works: you send us your original BCM, and we transfer its exact data—including your Vehicle Identification Number (VIN), key information, and specific options—to this replacement unit. The result? A module that is 100% plug-and-play. It arrives at your door ready for installation, with no additional programming or relearn procedures required for basic operation. This service is the key to a simple, successful repair for both DIY enthusiasts and professional technicians.
From the Diagnostic Bay: The Case of the Phantom Drain
A few months back, a 2009 Pontiac G8 was towed to my shop. The owner was at his wit’s end. He’d replaced the battery twice, but it would be dead every morning. He described flickering dash lights and the radio sometimes not turning off with the key out. Another shop had replaced the alternator to no avail. My first step was a parasitic draw test, which showed a significant drain. By pulling fuses one by one, I isolated the circuit to the BCM. A visual inspection of the original BCM revealed faint traces of corrosion on the main connector pins, likely from a minor windshield leak. This internal short was keeping various circuits awake, draining the battery. After we provided a replacement with the data cloned from his original unit, the parasitic draw vanished. The car started reliably, and all the strange electrical gremlins were gone. It’s a perfect example of how a failing 2008-2009 G8 Body Control Module can mimic other, more common failures.
Is Your Vehicle Showing These Symptoms?
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system or keyless entry failing to operate correctly.
- ✔ A persistent parasitic battery drain that kills your battery overnight.
- ✔ Instrument cluster warnings or gauges behaving erratically.
- ✔ Communication error codes stored, such as U0140 (Lost Communication With Body Control Module).
- ✔ The vehicle not starting due to the anti-theft system being incorrectly activated.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- ✔ Locate the BCM: In the 2008-2009 Pontiac G8, the Body Control Module is typically located in the center dash area. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely reconnect all electrical connectors, ensuring they click into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, radio, etc.—to confirm the repair was successful.
Important Post-Installation Notes
While our cloning service makes this a plug-and-play repair, some vehicle systems may require a handshake with the new BCM. Please be aware of the following:
- 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 airbag system with the BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure proper brake light and traction control operation.
Disclaimer: Specific procedures can vary. Always consult a factory service manual or a qualified technician for guidance.
Verified Vehicle Compatibility
This 2008-2009 G8 Body Control Module is the correct fit for your vehicle. It also serves as a direct replacement for a wide range of other GM vehicles and part numbers, ensuring broad compatibility. Please verify your original part number against the list below.
Primary Fitment: Pontiac G8 (2008-2009)
Interchangeable Part Numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
This part will fit these makes and models with these options:
EXPRESS 2500 VAN 10 Body Control (BCM); (center dash), 6.0L
EXPRESS 3500 VAN 08-09 Body Control (BCM); (center dash)
SAVANA 3500 VAN 10 Body Control (BCM); (center dash), 6.6L, VIN 6 (8th digit, opt LMM)
IMPALA 06-12 Body Control (BCM); (LH dash)
SAVANA 2500 VAN 10 Body Control (BCM); (center dash), 4.8L
ACADIA 07-12 Body Control (BCM); (LH dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
TAHOE 10 Body Control (BCM); (under steering column), ID 25892622
TRAVERSE 09-12 Body Control (BCM); (LH dash)
EXPRESS 3500 VAN 10 Body Control (BCM); (center dash), 6.6L, VIN 6 (8th digit, opt LMM)
YUKON 10 Body Control (BCM); (under steering column), ID 25892622
SAVANA 2500 VAN 11-12 Body Control (BCM); (center dash)
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 20815898
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921435
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 22860591
DTS 06-11 Body Control (BCM); (RH center dash)
OUTLOOK 07-10 Body Control (BCM); (center dash)
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 25892622
ESCALADE EXT 10 Body Control (BCM); (under steering column), ID 25892622
SAVANA 1500 VAN 08-12 Body Control (BCM); (center dash)
EXPRESS 2500 VAN 11-12 Body Control (BCM)
EXPRESS 1500 VAN 08-12 Body Control (BCM); (center dash)
STS 10 Body Control (BCM); center dash
SAVANA 3500 VAN 08-09 Body Control (BCM); (center dash)
TORRENT 07-09 Body Control (BCM); (center dash)
SAVANA 2500 VAN 10 Body Control (BCM); (center dash), 6.0L
TAHOE 10 Body Control (BCM); (under steering column), ID 20815898
CTS 08-13 Body Control (BCM); LH dash
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921436
EXPRESS 3500 VAN 10 Body Control (BCM); (center dash), 6.0L
G8 08-09 Body Control (BCM); (center dash)
IMPALA 13 Body Control (BCM); (LH dash), ID 22820315
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 20815898
AVALANCHE 1500 10 Body Control (BCM); (under steering column), ID 25892622
EXPRESS 2500 VAN 10 Body Control (BCM); (center dash), 4.8L
EXPRESS 2500 VAN 10 Body Control (BCM); (center dash), 6.6L, VIN 6 (8th digit, opt LMM)
YUKON 10 Body Control (BCM); (under steering column), ID 20815898
ESCALADE 10 Body Control (BCM); (under steering column), ID 25892622
LUCERNE 06-11 Body Control (BCM); (right side dash)
CTS 08 Body Control (BCM); RH dash
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 25892622
EXPRESS 3500 VAN 10 Body Control (BCM); (center dash), 4.8L
SAVANA 2500 VAN 08-09 Body Control (BCM); (center dash)
SAVANA 3500 VAN 10 Body Control (BCM); (center dash), 4.8L
SAVANA 3500 VAN 10 Body Control (BCM); (center dash), 6.0L
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 25892622
ESCALADE 10 Body Control (BCM); (under steering column), ID 20815898
SRX 07-09 Body Control (BCM); LH dash
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 20815898
EXPRESS 3500 VAN 11-12 Body Control (BCM)
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
SAVANA 3500 VAN 11-12 Body Control (BCM)
VUE 08-10 Body Control (BCM); (center dash)
CAPRICE 11-13 Body Control (BCM)
ENCLAVE 08-12 Body Control (BCM); (LH dash)
EXPRESS 2500 VAN 08-09 Body Control (BCM); (center dash)
SAVANA 2500 VAN 10 Body Control (BCM); (center dash), 6.6L, VIN 6 (8th digit, opt LMM)
Frequently Asked Questions
What is a cloning service?
Cloning is a process where we transfer the complete software profile (including VIN, mileage, and key data) from your original BCM to the replacement unit. This makes the new module a perfect digital match for your car, eliminating the need for dealer programming.
Will I need to get new keys made?
No. Because we clone your original module’s data, the replacement BCM will recognize your existing keys just like the original did. You can continue using your current keys without any changes.
Is this difficult to install for a DIYer?
The physical installation is straightforward for someone with basic mechanical skills. It involves removing a dash panel and swapping the module. Since our cloning service handles all the programming, it’s a plug-and-play electrical repair.
What if my airbag light is on after I install it?
This is not uncommon. It simply means the new BCM needs to be electronically introduced to the airbag system (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ can be performed with a bi-directional scan tool to resolve this.
Do I need to send my old BCM to you?
Yes, the cloning service requires your original BCM to read its data. After purchase, you will receive instructions on how to send your module to us. We will return your original module with the newly programmed replacement.