Tired of Your Monte Carlo’s Bizarre Electrical Problems?
Are your power windows acting possessed? Do your interior lights flicker for no reason, or does your security system prevent you from starting the car? These frustrating, random electrical issues often point to one culprit: a failing Body Control Module (BCM). The BCM is the central nervous system for your car’s comfort and convenience features. When it starts to fail, it can create a cascade of confusing problems that seem unrelated. Stop chasing electrical gremlins and get a definitive solution.
This is a direct-fit replacement Body Control Module for your 2006-2007 Chevrolet Monte Carlo. The best part? We handle the programming for you. Simply provide your vehicle’s VIN during checkout, and we will flash the module with the latest, most stable GM software specific to your car. This means no expensive trip to the dealership, no towing fees, and no special programming tools required on your end. It’s the most straightforward way to restore your car’s electronic systems to perfect working order.
Common Signs of a Failing BCM
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system light is on, and the car won’t start (anti-theft system activated).
- ✔ Instrument cluster gauges behaving erratically or going dark.
- ✔ Communication loss trouble codes, such as U0140, U0155, or other “U” codes.
- ✔ Unexplained battery drain that leaves you with a dead battery overnight.
Case Study: A Tricky Diagnosis
I remember a 2007 Monte Carlo SS that came into my shop with a complaint that would drive anyone crazy. The owner said that every few days, his battery would be completely dead. He’d already replaced the battery and the alternator. We tested for parasitic draw and found a significant one, but it was intermittent. After hours of tracing wires, we noticed the interior dome light would faintly glow long after the doors were shut. A scan tool showed a loss of communication with the BCM. The BCM wasn’t properly putting all the accessory circuits to sleep, causing the slow battery drain. Swapping in a correctly programmed BCM solved the issue permanently. It’s often not the obvious components, but the computer that controls them.
A Straightforward Guide to BCM Installation
- ✔ Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts.
- ✔ Locate the BCM: On your 2006-2007 Monte Carlo, the Body Control Module is typically located on the left-hand side of the steering column, under the dashboard. You will need to remove the lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the 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, making sure 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, etc.—to confirm proper operation.
Important Post-Installation Information
While this BCM is programmed for a plug-and-play installation, certain vehicle systems may require a relearn or synchronization procedure. This is a normal part of replacing a major electronic module.
- Airbag System Sync: If your airbag warning light illuminates 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.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure brake lights and traction control function correctly.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Vehicle Compatibility
This BCM, part number 20815898, is a direct replacement for a wide range of GM vehicles and supersedes multiple older part numbers. Please match your original part number to the list below or confirm fitment with your vehicle’s model and year.
Replaces 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
Fits Models Including:
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 1500/2500/3500 VANS (Various Years)
G8 08-09
HUMMER H2 08-09
IMPALA 06-13
LUCERNE 06-11
MONTE CARLO 06-07
OUTLOOK 07-10
SAVANA 1500/2500/3500 VANS (Various Years)
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
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, absolutely. Providing your VIN is essential. We use it to load the correct GM-certified software for your vehicle’s specific options and configuration. This ensures compatibility and proper function of all systems controlled by the BCM.
Is this a difficult part to replace myself?
For most DIYers with basic tools, this is a manageable job. It primarily involves removing a dash panel and swapping the module. The key benefit of our service is that the difficult part—the programming—is already done for you.
What happens if I don’t get the airbag or brake systems relearned?
If the airbag light is on, the system is disabled and will not deploy in an accident. It’s a critical safety issue that must be addressed. If the brake pedal position isn’t learned, you may have issues with brake light operation or traction/stability control warnings.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module, which can be helpful for double-checking part numbers or for any other reason.
Will this fix my car not starting?
It can. The BCM is a key part of the vehicle’s anti-theft (Pass-Key/Pass-Lock) system. If the BCM has failed, it can prevent the engine from starting. However, a no-start condition can have many causes, so proper diagnosis is always recommended.