Restore Your Cadillac’s Electrical System with a Plug-and-Play Solution
If you’re dealing with bizarre electrical issues in your 2010 Cadillac Escalade ESV—like power windows with a mind of their own, flickering lights, or door locks acting erratically—you’re likely facing a failing Body Control Module (BCM). As a technician with over 20 years of experience, I’ve seen how a faulty BCM can turn a luxury vehicle into a source of constant frustration. The BCM is the central nervous system for your vehicle’s comfort and convenience features, and when it fails, it can cause a cascade of confusing problems.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle and high cost out of the equation by programming this module specifically to your vehicle’s VIN before it ships. This means no expensive trips to the dealership for programming. You get a reliable part, loaded with the latest GM software, that’s ready for installation right out of the box. This is the most efficient way to get your Escalade back to factory-perfect operation.
A Technician’s Notebook: The Phantom Drain
I once had a 2010 Yukon XL (which uses this same BCM) in my bay with a battery that would die overnight. The owner had already replaced the battery and alternator. After hours of diagnostics, we traced the parasitic draw to the BCM. It wasn’t fully going to ‘sleep’ after the ignition was off, keeping other modules awake and slowly draining the battery. A simple swap with a VIN-programmed BCM like this one solved a problem that had stumped two other shops. These failures aren’t always obvious, but they are common.
Common Signs of a Failing BCM
- ✔ Power windows, mirrors, or door locks operate intermittently or not at all.
- ✔ Interior dome lights or exterior lamps stay on or won’t turn on.
- ✔ The security system acts up, or the key fob stops working.
- ✔ You see communication error codes on a scan tool, such as U0140 (Lost Communication With Body Control Module).
- ✔ Instrument panel gauges behave erratically or go dark.
- ✔ The vehicle won’t start, but the battery and starter are good.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On the 2010 Escalade ESV, the BCM is typically located under the driver’s side of the dashboard, near the steering column.
- ✔ Disconnect Wiring: Carefully unplug all electrical connectors from the old BCM. The levers on the connectors must be fully released before pulling. Do not force them.
- ✔ Swap the Module: Remove the mounting screws or clips holding the old BCM in place and remove it. Position the new module and secure it.
- ✔ Reconnect Everything: Plug all electrical connectors firmly into the new BCM. Reconnect the negative battery terminal.
- ✔ Perform Relearns: After installation, some vehicles may require additional steps. If your airbag light is on, a professional scan tool is needed for the ‘Setup SDM Primary Key in BCM’ procedure. A Brake Pedal Position Relearn might also be necessary for proper brake light and traction control function.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 20935349 and a wide range of other original equipment part numbers. It is compatible with numerous GM vehicles. Please verify your part number or consult the list below. Note that ID-specific fitments are critical.
Fits Models Including:
ACADIA 07-12, AVALANCHE 1500 10, CAPRICE 11-13, CAPTIVA SPORT 12, CTS 08-13, DTS 06-11, ENCLAVE 08-12, EQUINOX 07-09, ESCALADE/ESV/EXT 10, EXPRESS/SAVANA VANS 08-12, G8 08-09, HUMMER H2 08-09, IMPALA 06-13, LUCERNE 06-11, MONTE CARLO 06-07, OUTLOOK 07-10, SRX 07-09, STS 10, SUBURBAN 1500 10, TAHOE 10, TORRENT 07-09, TRAVERSE 09-12, VUE 08-10, YUKON/YUKON XL 1500 10. (Please check specific options and IDs in the original listing data for your exact vehicle).
Does this module really come programmed?
Does this module really come programmed?
Yes. After your purchase, you must provide us with your vehicle’s 17-digit VIN. We will then program the module with the latest GM software specific to your vehicle before we ship it. This makes installation much simpler.
What is a Body Control Module (BCM)?
The BCM is a computer in your vehicle responsible for managing a wide range of electronic accessories not related to the engine, such as power windows, locks, lights, wipers, and the security system. It’s the command center for passenger comfort and convenience.
Is this a difficult part for a DIYer to replace?
For someone with basic mechanical skills, the physical replacement is straightforward. It’s typically located under the dash and involves swapping connectors. The key is that our pre-programming service removes the most difficult step, which would otherwise require specialized dealer tools.
Is there a core charge for this part?
No, there is no core charge. You can keep your original module, so you don’t have to worry about the cost or hassle of sending the old part back.
What if my airbag light comes on after installation?
In some cases, the new BCM needs to be synced with the airbag system (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a standard post-installation step for certain GM models.