Restore Your Pontiac G8’s Electrical System
Are you dealing with baffling electrical problems in your 2008-2009 Pontiac G8? One minute the power windows work, the next they don’t. Maybe the interior lights have a mind of their own, or the security system is acting up for no reason. As an expert who has spent two decades diagnosing these exact issues, I can tell you that the Body Control Module (BCM) is almost always the culprit. It’s the central command for your car’s body electronics, and when it fails, it creates chaos. This isn’t just an annoyance; it can affect vehicle security and safety systems.
We offer a straightforward, reliable solution. This Body Control Module, part number 15921353, arrives at your door fully programmed to your vehicle’s specific VIN. We flash it with the latest GM software updates before it ships, which means you can skip the expensive trip to the dealership for programming. This is the most efficient way to get your G8 back to 100% functionality.
A Technician’s Notebook
A customer brought in his ’09 Pontiac G8 last month with a list of complaints that sounded like a poltergeist had taken over. The radio would shut off randomly, the driver’s side power lock was dead, and the dash lights would flicker intermittently. He’d already replaced the battery and checked all the fuses. After connecting my scan tool, I saw multiple communication errors pointing back to one source. We swapped in a pre-programmed 2008-2009 G8 Body Control Module, and within an hour, every single issue was resolved. These modules are notorious for causing a cascade of seemingly unrelated problems, and a direct-fit, correctly programmed replacement is the definitive fix.
Is Your G8 Showing These Symptoms?
- ✔️ Power windows, locks, or mirrors operating erratically or not at all.
- ✔️ Interior or exterior lights flickering, staying on, or not turning on.
- ✔️ The anti-theft or security system malfunctioning, preventing the car from starting.
- ✔️ Inconsistent operation of the windshield wipers or radio.
- ✔️ Multiple warning lights on the dash with no clear cause.
- ✔️ Communication error codes stored when checked with a diagnostic scanner.
A Straightforward Guide to Installation
For the confident DIYer or professional mechanic, installing this BCM is a manageable job. In most G8 models, the BCM is located in the center dash area.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the BCM: Access the BCM by removing the necessary trim panels around the center dash or glove box area. The exact location can be confirmed with a vehicle service manual.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. Note their orientation. Then, unbolt or unclip the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely reconnect all electrical connectors, ensuring they click into place.
- Perform Final Steps: Reassemble the dash panels and reconnect the negative battery terminal. Follow the critical post-installation procedures outlined below.
Critical Post-Installation Procedures
IMPORTANT: Replacing the BCM is not complete after the physical swap. To ensure safety and full functionality, the following steps are required and may necessitate a professional-grade scan tool.
- Airbag System Reset: The ‘Setup SDM Primary Key in BCM’ procedure must be performed. This re-establishes communication between the new BCM and the airbag system’s Sensing and Diagnostic Module (SDM). Failing to do this will leave the airbag warning light on, indicating a non-functional system.
- Brake Pedal Position Sensor Relearn: Some vehicles require a recalibration of the brake pedal position sensor after a BCM replacement. This is vital for the proper operation of the brake lights and stability control systems.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15921353 and a wide range of other GM part numbers. While this listing focuses on the 2008-2009 G8 Body Control Module, it is also compatible with the following vehicles. Please verify your original part number or consult with us if you are unsure.
Compatible 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
AVALANCHE 1500 10 Body Control (BCM); (under steering column), ID 25892622
CAPRICE 11-13 Body Control (BCM)
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921435, 20921436, or 22860591
CTS 08 Body Control (BCM); RH dash
CTS 08-13 Body Control (BCM); LH dash
DTS 06-11 Body Control (BCM); (RH center dash)
ENCLAVE 08-12 Body Control (BCM); (LH dash)
EQUINOX 07-09 Body Control (BCM); (center dash)
ESCALADE 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
ESCALADE EXT 10 Body Control (BCM); (under steering column), ID 25892622
EXPRESS 1500 VAN 08-12 Body Control (BCM); (center dash)
EXPRESS 2500 VAN 08-12 Body Control (BCM)
EXPRESS 3500 VAN 08-12 Body Control (BCM)
G8 08-09 Body Control (BCM); (center dash)
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
IMPALA 06-12 Body Control (BCM); (LH dash)
IMPALA 13 Body Control (BCM); (LH dash), ID 22820315
LUCERNE 06-11 Body Control (BCM); (right side dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
OUTLOOK 07-10 Body Control (BCM); (center dash)
SAVANA 1500 VAN 08-12 Body Control (BCM); (center dash)
SAVANA 2500 VAN 08-12 Body Control (BCM)
SAVANA 3500 VAN 08-12 Body Control (BCM)
SRX 07-09 Body Control (BCM); LH dash
STS 10 Body Control (BCM); center dash
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TAHOE 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TORRENT 07-09 Body Control (BCM); (center dash)
TRAVERSE 09-12 Body Control (BCM); (LH dash)
VUE 08-10 Body Control (BCM); (center dash)
YUKON 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
Frequently Asked Questions
Do I need to send my old BCM to you?
No, there is no core charge or need to send in your original part. This is a direct purchase.
Is this part really plug-and-play?
It is plug-and-play in the sense that it arrives programmed and doesn’t require a trip to the dealer for initial flashing. However, as noted above, you must perform the required post-installation procedures like the airbag system reset for everything to work correctly and safely.
What information do you need from me?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN. We cannot program and ship the module without it.
What tools are needed for the post-installation procedures?
You will need a professional-grade bidirectional scan tool (like a GM Tech 2, MDI, or high-end aftermarket equivalent) that can perform security and body control system functions. Basic code readers cannot perform these tasks.
Will this fix my car not starting?
It can. The BCM is a critical part of the vehicle’s anti-theft system (Pass-Key/Pass-Lock). If the BCM has failed, it can prevent the engine from starting. Our programming ensures the security data matches your vehicle.