Restore Full Functionality to Your Chevy Impala or Monte Carlo
Are you dealing with baffling electrical issues in your 2000-2004 Chevrolet Impala or Monte Carlo? Flickering interior lights, unresponsive power windows and locks, or a security light that won’t turn off are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can make your car frustrating to drive. This replacement module, part number 10350647, is the reliable, dealership-alternative solution you need. We program it to your vehicle’s specific VIN before shipping, ensuring it’s ready for installation right out of the box.
Common Signs of a Failing BCM
A failing BCM can cause a wide range of confusing symptoms. In my 20+ years of experience, these are the most common complaints I see from Impala and Monte Carlo owners. If your car is showing these signs, a faulty BCM is the likely culprit.
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting behavior.
- ✔ The security or anti-theft light stays on, potentially causing a no-start condition.
- ✔ Inaccurate readings on the instrument cluster gauges.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors (U-codes) or body systems (B-codes).
- ✔ Radio or climate control systems functioning incorrectly.
A Technician’s Notebook: The Impala That Wouldn’t Stay Running
A customer brought in a 2002 Impala with a classic complaint: it would start, run for two seconds, and then shut off. The security light was flashing on the dash. They had already replaced the battery and ignition switch based on internet advice, with no luck. My scan tool pulled a B2960 code (Security System Sensor Data Incorrect but Valid). This pointed directly to a communication breakdown between the ignition cylinder’s Passlock sensor and the BCM. The BCM was failing to properly read the security key data. Instead of a costly, multi-part repair, we installed a VIN-programmed 2000-2004 Impala BCM. The car started immediately and ran perfectly. This single component solved the entire problem, saving the customer hundreds in unnecessary diagnostic time and parts.
A Straightforward Guide to Installation
Replacing the BCM on your Impala or Monte Carlo is a manageable job for a confident DIYer. The module is located under the driver’s side of the dashboard, near the steering column. While straightforward, always prioritize safety.
- Safety First: Disconnect the negative terminal from your car’s battery and wait at least 10 minutes to allow all systems to discharge.
- Access the Module: Remove the plastic knee bolster panel below the steering column to gain access to the BCM. It’s typically held in place by a few screws or clips.
- Identify and Disconnect: The BCM will have several multi-pin electrical connectors. Carefully release the locking tabs on each connector and pull them straight out. Do not force them.
- Remove the Old BCM: Unbolt or unclip the old BCM from its mounting bracket and remove it from the vehicle.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors. You should hear a click as they lock into place.
- Final Steps: Reinstall the knee bolster panel and reconnect the negative battery terminal. Your installation is complete.
Important Post-Installation Information
Because this module arrives programmed to your VIN, most functions will work immediately. However, 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 new BCM with the airbag system. This is only necessary if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be required to ensure your brake lights and traction control system operate correctly. This also requires a compatible diagnostic tool.
Disclaimer: Specific procedures can vary. We always recommend consulting a factory service manual or a qualified technician for guidance.
Verified Vehicle Compatibility
This Body Control Module is a direct-fit replacement for the following vehicles and part numbers. It is a programmed replacement for part 10350647 and is compatible with service numbers 10323612, 10340320, 10432318, 10432571, 10438145, and 10445875.
- 2000-2004 Chevrolet Impala – Body Control (BCM); (LH steering column)
- 2000-2004 Chevrolet Monte Carlo – Body Control (BCM); (LH steering column)
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN is essential. We use it to program the BCM with your car’s specific software and security information. This ensures the module works correctly with your vehicle’s options and anti-theft system, saving you a trip to the dealership for expensive programming.
Is this a plug-and-play part?
For most functions, yes. Because we pre-program it, the core features will work upon installation. However, as noted, some vehicles may require a simple relearn procedure for the airbag or brake systems, which needs a professional scan tool.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module.
How do I find my original BCM part number?
The part number is printed on a white label directly on the BCM housing. You will need to access the module under the driver’s side dashboard to see it. This listing is compatible with several part numbers, including 10438145.
Will this fix my ‘Security’ light issue?
In the vast majority of cases, yes. A flashing or solid security light on these models is one of the most common symptoms of a failing 2000-2004 Impala BCM. This programmed module is designed to resolve that communication failure.