Restore Your Monte Carlo’s Electrical System
Are you dealing with baffling electrical issues in your 2006-2007 Chevrolet Monte Carlo? Flickering dash lights, power windows with a mind of their own, or a security system that prevents your car from starting can all point to one culprit: a failing Body Control Module (BCM). As the central command for your car’s body electronics, a faulty BCM can create a cascade of frustrating and unpredictable problems. This isn’t just an inconvenience; it can affect your vehicle’s security and daily reliability.
This replacement Body Control Module, part number 20935349, is the definitive solution. We take the guesswork and dealership hassle out of the equation. Before we ship the part, we program it with the latest GM software specifically for your vehicle using the VIN you provide. This means it arrives ready to install, saving you time and the significant expense of dealership programming. Restore your car’s proper function and your peace of mind with a reliable, VIN-matched 2006-2007 Monte Carlo BCM.
A Technician’s Notebook
A customer brought in his ’07 Monte Carlo last month with a classic case of BCM failure. The symptoms were all over the place: the radio would cut out, the interior dome light wouldn’t turn off, and worst of all, he was experiencing an intermittent no-start condition. The security light was flashing, indicating the Passlock system was failing to recognize the key. After confirming power and grounds to the BCM were solid, we knew the module itself was the issue. A non-programmed replacement would have meant towing the car to a dealer. Instead, we used a pre-programmed unit like this one. The swap took less than an hour, and the car fired right up with all electronics working perfectly. This is the most efficient way to solve these complex electrical gremlins.
Common Signs of a Failing BCM
If your vehicle is experiencing any of these issues, a failing BCM is a likely cause. As the nerve center for various components, its failure can manifest in numerous ways. Here are some of the most frequent symptoms I’ve seen in the shop:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Dashboard lights flickering, staying on, or not working at all.
- ✔ The security or anti-theft system light flashing, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Interior or exterior lights behaving strangely (e.g., staying on and draining the battery).
- ✔ Inaccurate readings on the instrument cluster gauges.
- ✔ Communication errors with other vehicle modules, often flagged by a professional scan tool.
Your Straightforward BCM Installation Guide
Replacing the 2006-2007 Monte Carlo BCM is a manageable job for a confident DIYer. It is typically located on the left-hand side of the steering column. Follow these steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your car’s battery and wait about 10-15 minutes to allow all modules to power down completely.
- Locate the BCM: On the Monte Carlo, you’ll find the BCM attached to the steering column, usually under the driver’s side lower dash panel. You may need to remove this plastic trim panel for access.
- Disconnect and Remove: Carefully unplug all electrical connectors from the old BCM. They have locking tabs that need to 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 plug in all the electrical connectors, ensuring they click into place.
- Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- Perform Post-Installation Procedures: Turn the key to the ‘ON’ position. It is critical to perform the necessary relearn procedures as outlined below to ensure full system functionality.
Important Post-Installation Steps
After installing your new BCM, a few final steps are required to sync the new module with your vehicle’s other systems. Failure to do so can result in warning lights or improper function.
- Airbag System Reset: If the airbag warning light is on, you must perform the ‘Setup SDM Primary Key in BCM’ procedure. This requires a bi-directional scan tool and ensures the BCM and Supplemental Donning Module (airbag computer) can communicate correctly.
- Brake Pedal Position Sensor Relearn: Some vehicles require the Brake Pedal Position Sensor to be recalibrated after a BCM replacement. This is crucial for the proper operation of traction control and anti-lock brakes. This procedure also typically requires a capable diagnostic tool.
If you are not equipped with the necessary diagnostic tools or are unsure about these procedures, we strongly recommend seeking assistance from a qualified professional technician.
Verified Vehicle Compatibility List
This BCM is a direct replacement for part number 20935349 and is also compatible with a wide range of other GM part numbers. It fits the following vehicles, but always verify your part number and consult the detailed fitment list below.
This module fits the 2006-2007 Monte Carlo where the BCM is located at the LH steering column. It also fits a broad range of other GM vehicles, including but not limited to:
Note: Please refer to the original fitment data for specific options and ID numbers required for these other models.
This module is a direct replacement for 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.
Frequently Asked Questions
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and vehicle-specific options your Monte Carlo came with from the factory. This ensures all features work correctly and makes the installation a true plug-and-play experience, avoiding a costly trip to the dealer.
Can I install this myself if I don’t have a professional scan tool?
You can perform the physical installation, which is straightforward. However, post-installation procedures like resetting the airbag light (SDM key setup) or recalibrating the brake pedal sensor require a bi-directional scan tool. If you don’t have one, you will need to have a local mechanic complete these final steps for you.
Will this fix my car’s security system/no-start problem?
Yes, a faulty BCM is a very common cause of issues with the GM Passlock anti-theft system. A correctly programmed 2006-2007 Monte Carlo BCM will restore the proper communication between your key, the BCM, and the powertrain module, resolving these security-related starting problems.
Is this a new or used part?
This is a quality, tested, and verified used OEM part. We ensure it is fully functional and then program it with the latest GM software for your vehicle, providing a reliable and cost-effective alternative to a brand new module.
How do I provide my VIN after purchase?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot program and ship your BCM until we receive this information, so please provide it promptly to avoid delays.