End the Electrical Chaos in Your GM Truck
Is your GMC Sierra or Chevrolet Silverado suddenly acting possessed? One minute the A/C works, the next it’s dead. The radio cuts out, power windows refuse to budge, or you’re staring at a persistent airbag light on the dash. These aren’t random glitches; they’re classic signs of a failing Body Control Module (BCM). As a technician with over 20 years of experience, I’ve seen these exact issues hundreds of times. The BCM is the electronic brain for your truck’s comfort and security features, and when it fails, it can make your vehicle incredibly frustrating to drive. This module, part number 20939137, is the definitive, hassle-free solution.
We take the guesswork and extra cost out of the repair. Each module is expertly programmed to your vehicle’s specific VIN before shipping. This means you can skip the expensive trip to the dealership for programming. It arrives at your door ready for a true plug-and-play installation, restoring full functionality and communication between your vehicle’s systems. For a DIY mechanic or a professional shop, this is the most efficient way to get a reliable fix for a 2013 Sierra 3500 BCM and get that truck back to work.
From the Diagnostic Bay: The Case of the Stubborn Airbag Light
A customer brought in his 2011 Silverado 2500 with an airbag light that two other shops couldn’t fix. They had replaced sensors, but the light and the DTC B1001 always came back. He was also complaining about his dome light flickering. My first check wasn’t the airbag system, but the BCM data stream. I noticed erratic voltage readings. After a quick inspection under the dash, I found a classic culprit: a slightly corroded BCM ground wire. While cleaning the ground helped the light flicker, the B1001 code persisted. The original BCM had been damaged by the poor connection. We installed one of our VIN-programmed BCMs, ensured the ground was solid, and performed the quick ‘SDM Key Setup’ with our scan tool. The code cleared, the airbag light went out for good, and all his accessories worked perfectly. It’s a prime example of how a failing BCM can send you chasing ghosts if you don’t know the signs.
Is Your Truck Exhibiting These Electrical Gremlins?
- ✔ Intermittent or completely non-functional HVAC and climate controls.
- ✔ Airbag warning light is illuminated, often with a DTC B1001 stored.
- ✔ Power windows, door locks, or exterior lights work sporadically or not at all.
- ✔ Vehicle security system acts up, causing no-start conditions or random alarm triggers.
- ✔ Unexplained battery drain or issues with electrical grounding.
- ✔ A variety of communication or body-related diagnostic trouble codes (DTCs).
Your 5-Minute Path to a Fully Functional Truck
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the Module: The BCM is typically found under the driver’s side dashboard, near the steering column. No major disassembly is required.
- ✔ Swap the Part: Carefully unplug the electrical connectors from the old BCM. Remove it from its mounting bracket and install the new module in its place.
- ✔ Reconnect and Test: Securely plug in all electrical connectors to the new BCM. Reconnect the battery terminal and start the vehicle. Test all functions like lights, locks, windows, and HVAC to confirm the repair.
- ✔ Post-Install Checks: In some cases, an airbag light may remain on. This is normal and requires a ‘Setup SDM Primary Key in BCM’ procedure using a bi-directional scan tool. Similarly, a ‘Brake Pedal Position Relearn’ may be needed. Always consult a service manual for model-specific requirements.
This replacement 2013 Sierra 3500 BCM is built to meet or exceed original equipment standards, ensuring a dependable and long-lasting repair. And with our no-hassle, one-year warranty and no core charge, you can complete the job with total confidence.
Verified Fitment for Your GM Truck or SUV
AVALANCHE 1500 08-09 Body Control (BCM); (under steering column)
AVALANCHE 1500 10 Body Control (BCM); (under steering column), ID 25835966
AVALANCHE 1500 11 Body Control (BCM)
ESCALADE 07-09 Body Control (BCM); (under steering column)
ESCALADE 10 Body Control (BCM); (under steering column), ID 25835966
ESCALADE 11 Body Control (BCM); (under steering column)
ESCALADE ESV 07-09 Body Control (BCM); (under steering column)
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 25835966
ESCALADE ESV 11 Body Control (BCM); (under steering column)
ESCALADE EXT 07-09 Body Control (BCM); (under steering column)
ESCALADE EXT 10 Body Control (BCM); (under steering column), ID 25835966
ESCALADE EXT 11 Body Control (BCM); (under steering column)
SIERRA 1500 PICKUP 07 Body Control (BCM); new style (smooth door skin), (under steering column)
SIERRA 1500 PICKUP 08 Body Control (BCM); (under steering column)
SIERRA 1500 PICKUP 09 Body Control (BCM), (under steering column)
SIERRA 1500 PICKUP 10-11 Body Control (BCM); (under steering column)
SIERRA 2500 PICKUP 07 Body Control (BCM); new style (smooth door skin), (under steering column)
SIERRA 2500 PICKUP 08-11 Body Control (BCM); (under steering column)
SIERRA 2500 PICKUP 13 Body Control (BCM); (under steering column), ID 25835966
SIERRA 3500 PICKUP 07 Body Control (BCM); new style (smooth door skin), (under steering column)
SIERRA 3500 PICKUP 08-11 Body Control (BCM); (under steering column)
SIERRA 3500 PICKUP 13 Body Control (BCM); (under steering column), ID 25835966
SIERRA DENALI 07 Body Control (BCM); new style (smooth door skin), (under steering column)
SIERRA DENALI 08-10 Body Control (BCM); (under steering column)
SIERRA DENALI 1500 11 Body Control (BCM); (under steering column)
SIERRA DENALI 2500 11 Body Control (BCM); (under steering column)
SIERRA DENALI 2500 13 Body Control (BCM); (under steering column), ID 25835966
SIERRA DENALI 3500 11 Body Control (BCM); (under steering column)
SIERRA DENALI 3500 13 Body Control (BCM); (under steering column), ID 25835966
SILVERADO 1500 PICKUP 07 Body Control (BCM); new style (smooth door skin), (under steering column)
SILVERADO 1500 PICKUP 08-11 Body Control (BCM); (under steering column)
SILVERADO 2500 PICKUP 07 Body Control (BCM); new style (smooth door skin), under steering column)
SILVERADO 2500 PICKUP 08 Body Control (BCM), (under steering column)
SILVERADO 2500 PICKUP 09-11 Body Control (BCM); (under steering column)
SILVERADO 2500 PICKUP 13 Body Control (BCM); (under steering column), ID 25835966
SILVERADO 3500 PICKUP 07 Body Control (BCM); new style (smooth door skin), (under steering column)
SILVERADO 3500 PICKUP 08 Body Control (BCM), (under steering column)
SILVERADO 3500 PICKUP 09-11 Body Control (BCM); (under steering column)
SILVERADO 3500 PICKUP 13 Body Control (BCM); (under steering column), ID 25835966
SUBURBAN 1500 07-09 Body Control (BCM); (under steering column)
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 25835966
SUBURBAN 1500 11 Body Control (BCM); (under steering column)
SUBURBAN 2500 07-09 Body Control (BCM); (under steering column)
SUBURBAN 2500 10 Body Control (BCM), (under steering column)
SUBURBAN 2500 11 Body Control (BCM); (under steering column)
TAHOE 07 Body Control (BCM); (under steering column)
TAHOE 08 Body Control (BCM)
TAHOE 09 Body Control (BCM); (under steering column)
TAHOE 10 Body Control (BCM); (under steering column), ID 25835966
TAHOE 11 Body Control (BCM); (under steering column)
YUKON 07 Body Control (BCM); (under steering column)
YUKON 08 Body Control (BCM), (under steering column)
YUKON 09 Body Control (BCM); (under steering column)
YUKON 10 Body Control (BCM); (under steering column), ID 25835966
YUKON 11 Body Control (BCM), (under steering column)
YUKON XL 1500 07-09 Body Control (BCM), (under steering column)
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 25835966
YUKON XL 1500 11 Body Control (BCM); (under steering column)
YUKON XL 2500 07-08 Body Control (BCM), (under steering column)
YUKON XL 2500 09-11 Body Control (BCM); (under steering column)
This module also interchanges with part numbers: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939138, 22860591.
Frequently Asked Questions
Frequently Asked Questions
Do I need to send my original BCM back?
No, there is absolutely no core charge for this part. You can keep your old module, which saves you the time and expense of return shipping.
What does ‘VIN Programmed’ actually mean for me?
It means we load your truck’s specific Vehicle Identification Number and related software into the BCM before we ship it. This makes it a plug-and-play part, saving you from a mandatory and costly programming session at a dealership.
What tools do I need for installation?
Basic hand tools are all that’s required for the physical swap, typically just a socket or trim removal tool to access the module under the dash. For potential post-installation procedures like an airbag light reset, a professional bi-directional scan tool is necessary.
My airbag light is on. Will this BCM fix it?
This module will fix the issue if the BCM itself is the cause of the light, which is common with a B1001 code. However, after installation you may need a technician with an advanced scan tool to perform the ‘Setup SDM Primary Key in BCM’ function to sync the new BCM with the airbag system and turn off the light.
What if I have issues after installing the 2013 Sierra 3500 BCM?
We stand by our products. Your purchase is covered by a one-year warranty. If you encounter any problems, our expert support team is here to help you troubleshoot and ensure you get the resolution you need.