Restore Your SUV’s Brain and Banish Electrical Gremlins
Is your 2010 Chevy Suburban 1500 acting possessed? One day the power windows work, the next they don’t. Maybe the interior lights are flickering, the security system is randomly engaging, or worse, the vehicle won’t start at all. As a technician with over two decades of experience, I’ve seen these exact symptoms countless times. The culprit is almost always a failing Body Control Module (BCM)—the central computer responsible for managing your vehicle’s non-engine-related electronics.
A failing BCM can turn a reliable vehicle into a source of constant frustration. It controls everything from your power locks and radio to your instrument cluster and interior lighting. When it starts to go, it sends confusing signals throughout the vehicle, leading to unpredictable and maddening problems. This isn’t just an annoyance; it can be a safety issue if your exterior lights or security systems are compromised.
Case Study: A Tricky Diagnosis
I remember a 2010 Suburban that came into my shop with a laundry list of complaints from the owner. The radio would cut out, the driver’s side window was dead, and the “Service 4WD” light was on, even though the transfer case was fine. The owner had already replaced the battery and checked fuses with no luck. After connecting my scan tool, I found a series of communication error codes (U-codes) pointing to a network problem. Instead of chasing individual components, experience told me to look at the network’s command center: the BCM. A quick voltage drop test on the BCM’s power and ground circuits confirmed it was failing internally. We replaced it with a pre-programmed unit like this one, and every single issue was resolved instantly. It’s a classic example of how one failing module can create a storm of problems.
Common Signs of a Failing BCM
- ✔ Intermittent or non-functional power windows, locks, or mirrors.
- ✔ Flickering or inoperative interior dome lights and exterior lights (headlights, taillights).
- ✔ The security system or alarm engages randomly, or the key fob stops working.
- ✔ Inaccurate or dead gauges on the instrument panel.
- ✔ Warning lights on the dash, such as for the airbag or traction control system.
- ✔ Communication DTCs (Diagnostic Trouble Codes) like U0100, U0140, or other U-series codes.
- ✔ A complete no-start condition where the engine doesn’t crank.
A Straightforward Guide to Installation
Replacing the 2010 Suburban Body Control Module is a manageable job for a DIYer with basic tools. The BCM is typically located under the driver’s side of the dashboard, near the steering column. Follow these steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait about 10 minutes to allow the systems to fully power down.
- Locate the Module: Remove the lower dash panel beneath the steering wheel to gain access to the BCM. It’s a black plastic box with several large electrical connectors.
- Disconnect: Carefully release the locking tabs on each electrical connector and unplug them from the old BCM. The levers on the connectors make this easier.
- Remove Old BCM: Unbolt or unclip the old module from its mounting bracket.
- Install New BCM: Mount your new, pre-programmed BCM in the same location.
- Reconnect Everything: Firmly plug all electrical connectors back into the new module. You should hear a click as they lock into place. Reconnect the negative battery terminal.
- Final Steps & Verification: Start the vehicle and test all body functions—windows, locks, lights, radio, etc. Note that some additional relearn procedures may be required as detailed below.
Important Post-Installation Information
Because this module is central to so many systems, a couple of simple relearn procedures may be necessary after installation. This is completely normal.
- Airbag System Sync: If the 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.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure brake lights and stability control function correctly.
We handle the most critical step by programming the module to your VIN before it ships. This saves you a trip to the dealership and hundreds of dollars in programming fees. Plus, there is no core charge, so you don’t have to worry about sending your old part back.
Verified Vehicle Compatibility
This Body Control Module is a direct replacement for part number 20935349 and a wide range of other interchangeable part numbers. It is guaranteed to fit the following vehicles. Please verify the location notes and specific IDs where applicable.
Fitment List:
ACADIA 07-12 Body Control (BCM); (LH dash)
AVALANCHE 1500 10 Body Control (BCM); (under steering column), ID 25892622
CAPRICE 11-13 Body Control (BCM)
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921435, 20921436, or 22860591
CTS 08-13 Body Control (BCM); LH dash
DTS 06-11 Body Control (BCM); (RH center dash)
ENCLAVE 08-12 Body Control (BCM); (LH dash)
EQUINOX 07-09 Body Control (BCM); (center dash)
ESCALADE 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
ESCALADE EXT 10 Body Control (BCM); (under steering column), ID 25892622
EXPRESS/SAVANA VANS 08-12 (Multiple engines/models, check your specific application)
G8 08-09 Body Control (BCM); (center dash)
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
IMPALA 06-13 Body Control (BCM); (LH dash)
LUCERNE 06-11 Body Control (BCM); (right side dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
OUTLOOK 07-10 Body Control (BCM); (center dash)
SRX 07-09 Body Control (BCM); LH dash
STS 10 Body Control (BCM); center dash
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TAHOE 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TORRENT 07-09 Body Control (BCM); (center dash)
TRAVERSE 09-12 Body Control (BCM); (LH dash)
VUE 08-10 Body Control (BCM); (center dash)
YUKON 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
Frequently Asked Questions
Frequently Asked Questions
Do I need to have a dealership program this BCM?
No. We program the module to your vehicle’s specific VIN before we ship it to you. This makes the installation process much simpler and saves you significant cost and time.
Where is the BCM located on my 2010 Suburban 1500?
The Body Control Module is located under the driver’s side dashboard, typically to the left of the steering column. You will need to remove the lower dash cover panel to access it.
What is a core charge? Do I need to send my old part back?
A core charge is a deposit you pay until you return your old part. We do not have a core charge on this item, so you can keep your original module without any penalty.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We will provide simple instructions on how to do this. We cannot ship your part until we receive the VIN.
Will this fix my airbag light?
If the airbag light is on due to a communication fault with a bad BCM, then yes, this part will resolve the root cause. However, as a safety protocol, the system will still need to be synced using the ‘Setup SDM Primary Key’ procedure with a professional scan tool to turn the light off.