Are you battling bizarre electrical issues in your 2000-2004 Chevrolet Impala or Monte Carlo? If you’re dealing with flickering lights, unresponsive power windows, a malfunctioning security system, or other electronic gremlins, a failing Body Control Module (BCM) is the most likely culprit. The BCM acts as the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a wide range of frustrating problems. This replacement module is the definitive solution to restore your vehicle’s proper function and reliability.
This is a direct-fit replacement Body Control Module, compatible with part numbers 10350647, 10445875, and others listed below. To ensure a seamless installation, we program the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This critical step ensures compatibility with your car’s existing systems and options, eliminating the need for expensive dealership programming. Simply provide your VIN after purchase, and we’ll handle the rest.
We once had a 2003 Impala in the shop with a classic parasitic battery drain. The owner had already replaced the battery twice and even the alternator, but every few days, the car would be dead. After checking the basics, we noticed the interior lights would faintly glow long after the car was shut off. A scan tool showed no communication with the BCM. It turned out the module was failing to enter ‘sleep’ mode, keeping other systems active and draining the battery. Installing a VIN-programmed 2000-2004 Impala BCM like this one was the final, correct repair that solved the phantom drain for good.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, and mirrors.
- ✔ The anti-theft or ‘Security’ light stays illuminated, potentially causing a no-start condition.
- ✔ Interior dome lights or exterior lights stay on or do not function at all.
- ✔ Instrument cluster displaying false warnings like ‘Door Ajar’.
- ✔ Erratic behavior from the radio or climate control systems.
- ✔ Inability for a diagnostic scan tool to communicate with the module.
Restore Your Vehicle’s Electronics with a 2000-2004 Impala BCM
Don’t let a faulty module dictate how your car behaves. This replacement BCM is your path to resolving those persistent electrical issues. By having the unit pre-programmed to your VIN, you are receiving a component that is ready for installation with minimal post-install procedures required. This saves you time, money, and the headache of a trip to the dealership. This module is fully compatible with all systems in your 2000-2004 Impala or Monte Carlo.
Installation & Required Procedures
While this module is programmed for your vehicle, some GM platforms of this era may require simple post-installation relearn procedures. These can sometimes be performed by a local mechanic or with a high-end diagnostic tool.
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor recalibration may be necessary to ensure correct brake light operation and traction control function.
This module is a direct replacement for the following service numbers: 10323612, 10340320, 10350647, 10432318, 10432571, 10438145, 10445875.
Frequently Asked Questions
What does the Body Control Module do on my Impala?
The BCM is a computer that controls and monitors many of your car’s non-engine related functions. This includes power windows, door locks, the security system, interior and exterior lighting, and communication between various electronic modules.
Is this a plug-and-play part?
Because we program the module to your VIN before shipping, it is as close to plug-and-play as possible. However, as noted, some vehicles may require minor relearn procedures for the airbag or brake systems after installation.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship your order until we receive this information, as the programming is essential for the part to function correctly.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module.
Will this fix the ‘Security’ light issue that prevents my car from starting?
Yes, a faulty BCM is a very common cause of a persistent ‘Security’ light and a no-start condition on these vehicles. Replacing it with this pre-programmed unit is a reliable fix for that specific problem.
Where is the BCM located on a 2000-2004 Impala?
The Body Control Module is typically located on the driver’s side, under the dashboard to the left of the steering column.