Is Your 2000-2004 Chevrolet Impala or Monte Carlo Experiencing Bizarre Electrical Issues?
If you’re dealing with flickering lights, malfunctioning power windows, a persistent security light, or other strange electrical gremlins, a failing Body Control Module (BCM) is the most likely culprit. The BCM acts as the central command center for your vehicle’s body electronics, and when it starts to fail, it can cause a wide range of frustrating and seemingly unrelated problems. This replacement module is the definitive solution to restore your vehicle’s proper functionality.
We take the guesswork and hassle out of the repair. Unlike a generic module from a parts store or salvage yard, this BCM is professionally programmed specifically for your vehicle using your VIN. We flash it with the latest GM software updates, ensuring it communicates perfectly with your car’s existing systems and options. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
From the Diagnostic Bay
We once had a 2002 Impala come in with a dead battery every morning. The owner had already replaced the battery twice and the alternator once. After a quick parasitic draw test, we found a circuit related to the interior lights was staying active. The root cause wasn’t a bad switch or a short, but a faulty BCM that wasn’t properly putting the circuit to sleep. Replacing the BCM with a pre-programmed unit like this one solved the phantom drain instantly, saving the customer from further unnecessary parts replacement.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The anti-theft or “Security” light is illuminated, potentially causing a no-start condition.
- ✔ Instrument cluster gauges behaving erratically or going dark.
- ✔ HVAC climate control system not functioning correctly.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ False warning messages or chimes on the driver information center.
Your Pre-Programmed 2000-2004 Impala BCM Solution
This isn’t just a part; it’s a complete, ready-to-install solution. By providing us with your Vehicle Identification Number (VIN) during checkout, you ensure that the 2000-2004 Impala BCM you receive is a perfect match for your vehicle’s specific configuration. This plug-and-play approach simplifies the installation process, making it manageable for both DIY enthusiasts and professional technicians.
Installation and Post-Install Procedures
Installation is straightforward, as this is a direct replacement for the original module located on the left-hand side of the steering column. However, due to the integration of various vehicle systems, a couple of follow-up procedures may be necessary:
- Airbag System Sync: If the airbag warning light is on after installation, a “Setup SDM Primary Key in BCM” procedure must be performed with a capable scan tool to sync the modules.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor recalibration may be needed to ensure correct brake light and traction control operation.
Part Number Compatibility
This module is a direct replacement for the following GM service part numbers:
10323612, 10340320, 10350647, 10432318, 10432571, 10438145, 10445875
Frequently Asked Questions
Do I have to send you my VIN?
Yes, providing your VIN is mandatory. We cannot ship the module without it, as we use it to program the unit with the correct software and vehicle options for a seamless installation.
Is this part truly plug-and-play?
For most functions, yes. Because it comes pre-programmed, it will operate the main systems immediately. However, as noted, you may need a scan tool to perform an airbag sync or brake pedal relearn if warning lights appear after installation.
Will this fix the ‘Security’ light on my dashboard?
A failing BCM is the most common cause of Passlock security system issues in these vehicles. This programmed module will resolve BCM-related security faults and allow your vehicle to start reliably.
Where is the BCM located on my Impala?
The Body Control Module is typically located on the driver’s side, attached to the left-hand side of the steering column, often behind the lower dash panel.
Is there a core charge for my old module?
No, there is no core charge. You can keep your original module.
Does this fit the Chevrolet Monte Carlo as well?
Yes, this BCM is also compatible with 2000-2004 Chevrolet Monte Carlo models, as they share the same platform and electronics.