Restore Full Functionality to Your GM Vehicle
Are you dealing with baffling electrical problems in your Buick Lucerne or another compatible GM vehicle? Issues like power windows with a mind of their own, door locks that don’t respond, interior lights flickering, or a security light that prevents your car from starting are classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can turn a reliable car into a source of daily frustration. This isn’t just an inconvenience; it can be a significant safety and security issue.
This is a direct-fit replacement Body Control Module, part number 20935349, for a wide range of GM vehicles. The best part? We offer a professional cloning service. This means you send us your original BCM, and we transfer its exact data—including key fob information, security protocols, and vehicle-specific options—to this replacement unit. The result is a truly plug-and-play module that eliminates the need for expensive and time-consuming dealership programming. Get your vehicle’s features working reliably again with a dependable solution.
Case Study: A Tricky Diagnosis
I remember a 2008 Buick Lucerne that came into my shop with a complaint that was driving the owner crazy. The dome lights would randomly stay on, draining the battery overnight, and the remote keyless entry worked only intermittently. The customer had already replaced the battery twice. A quick scan showed several communication codes, including a U0140 (Lost Communication With Body Control Module). After checking the main power and ground connections to the BCM located on the right side of the dash, we confirmed the module itself was failing internally. Instead of a costly new module and hours of programming at the dealer, we used a cloned BCM. We transferred the data from his old unit, plugged the replacement in, and all the bizarre electrical issues were gone instantly. The customer was back on the road the same day for a fraction of the dealership’s quote.
Is Your Vehicle Showing These Symptoms?
- ✔ Power windows, mirrors, or door locks operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ Inconsistent or non-functional remote keyless entry.
- ✔ False warnings on the instrument cluster (e.g., ‘door ajar’ light).
- ✔ Diagnostic Trouble Codes (DTCs) related to BCM communication, such as U0140, B1001, or other U-series codes.
A Straightforward Guide to Installation
Our cloning service makes this repair accessible for both DIY enthusiasts and professional technicians. Since the critical data from your old module is transferred over, you bypass the most complex part of the job—reprogramming.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On the 2006-2011 Buick Lucerne, the BCM is typically located behind the right side of the dashboard, accessible after removing the glove box or a lower dash panel. For other models, its location can vary (e.g., under the steering column or in the center dash).
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, remove any bolts or clips holding the module in place and take it out.
- Install the New Module: Seat the cloned BCM into the mounting bracket and secure it. Reconnect all electrical connectors firmly until they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions: windows, locks, lights, wipers, and remote entry to ensure everything is working correctly.
Important Post-Installation Steps
While our cloning service handles the core programming, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following potential procedures:
- 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 relearn may be required to ensure correct brake light operation and to keep the traction control system happy.
- Disclaimer: All procedures can vary by exact make, model, and year. Always have a factory service manual or a qualified technician available for guidance.
Guaranteed Fitment for Your Vehicle
This BCM is a direct replacement for a vast array of GM vehicles and interchanges with the following 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.
It is compatible with models including, but not limited to:
AVALANCHE 1500 10
CAPRICE 11-13
CAPTIVA SPORT 12
CTS 08-13
DTS 06-11
ENCLAVE 08-12
EQUINOX 07-09
ESCALADE 10
ESCALADE ESV 10
ESCALADE EXT 10
EXPRESS 1500 VAN 08-12
EXPRESS 2500 VAN 08-12
EXPRESS 3500 VAN 08-12
G8 08-09
HUMMER H2 08-09
IMPALA 06-13
LUCERNE 06-11
MONTE CARLO 06-07
OUTLOOK 07-10
SAVANA 1500 VAN 08-12
SAVANA 2500 VAN 08-12
SAVANA 3500 VAN 08-12
SRX 07-09
STS 10
SUBURBAN 1500 10
TAHOE 10
TORRENT 07-09
TRAVERSE 09-12
VUE 08-10
YUKON 10
YUKON XL 1500 10
Frequently Asked Questions
What exactly is a BCM cloning service?
It’s a process where we transfer the complete software and vehicle-specific data (like key programming and security information) from your original, faulty BCM to this replacement unit. This makes the new module a perfect electronic match for your car, avoiding the need for dealership reprogramming.
Will I need to have my keys reprogrammed after installation?
No. Because we clone your original module’s data, the replacement BCM will already recognize your existing keys and remotes. This is one of the biggest benefits of our service.
What is the process after I place my order?
After you purchase, we will provide you with instructions for shipping your original BCM to our facility. Once we receive it, our technicians will perform the cloning service and ship both your original module and the ready-to-install replacement back to you.
Do you keep my old BCM?
No, we always return your original module along with the programmed replacement unit. You get to keep your original part.
Is this a difficult part for a DIYer to replace?
For most of the listed vehicles, the BCM is in a reasonably accessible location (like behind the glove box or under the dash). With basic hand tools and by following our guide, an experienced DIYer can typically complete the swap. The cloning service removes the most difficult step, which is the software programming.