Restore Full Electrical Control to Your GM Truck or SUV
If your 2007-2011 GMC Yukon is plagued by bizarre electrical problems—like windows that won’t roll down, a climate control system with a mind of its own, or a persistent airbag light—the Body Control Module (BCM) is the most likely culprit. As the central command center for your vehicle’s body electronics, a failing BCM can cause a cascade of frustrating and seemingly unrelated issues. This VIN-programmed Body Control Module, compatible with part number 20939137, is the definitive, hassle-free solution to restore your vehicle’s functionality and peace of mind.
We take the guesswork and dealership visits out of the equation. Before shipping, we program the module with your vehicle’s specific VIN and the latest GM software updates. This ensures it communicates perfectly with your truck’s other systems right out of the box. You get a reliable part that’s ready for immediate installation, solving those nagging electrical gremlins for good.
Case Study: The Ghost in the Machine
I had a 2008 Sierra 2500 in my bay last month that was driving the owner crazy. The radio would turn off randomly, the driver’s side power lock was dead, and the HVAC blower would only work on high. The owner had already replaced the blower motor resistor twice. After checking the grounds (always the first step with GM electrical!), I connected my scanner and saw a slew of communication codes pointing to the BCM. A failing BCM can send erratic voltage signals, making other good parts seem faulty. We swapped in a pre-programmed BCM, and every single issue vanished instantly. It’s a classic example of how a single module failure can mimic a dozen different problems.
Is Your Yukon Exhibiting These Electrical Gremlins?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Intermittent or non-functional power windows, door locks, or interior/exterior lights.
- ✔ Climate control (HVAC) that doesn’t respond or a blower motor that is stuck on one speed.
- ✔ An illuminated airbag warning light, often with Diagnostic Trouble Code (DTC) B1001.
- ✔ Security system malfunctions, including no-start or stalling conditions due to Pass-Key issues.
- ✔ Unresponsive windshield wipers or washers.
- ✔ A dashboard lit up with various warning lights and communication error codes (U-codes).
A Straightforward Guide to BCM Installation
For the average DIYer, replacing the BCM is a quick job that typically takes less than 15 minutes. It’s one of the most accessible modules in the vehicle.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most compatible GM trucks and SUVs, the BCM is located under the driver’s side of the dashboard, usually to the left of the steering column.
- Remove Connectors: Carefully unplug the electrical connectors from the old BCM. They have release tabs that need to be depressed. Do not force them.
- Swap the Module: Unclip or unbolt the old module from its mounting bracket and install the new one in its place.
- Reconnect and Test: Plug the connectors firmly into your new, pre-programmed 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 requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. Additionally, a Brake Pedal Position Relearn might be needed to ensure proper brake light and stability control operation.
Verified Vehicle Compatibility List
This module is a direct replacement for part number 20939137 and other interchangeable numbers on a wide range of General Motors vehicles. It is guaranteed to fit the following models:
This module is interchangeable 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 about the 2007-2011 Yukon BCM
Frequently Asked Questions
Does this BCM really not require any programming at the dealership?
That’s correct. We handle all the programming based on the VIN you provide during checkout. It arrives ready to install, saving you time and the high cost of dealer programming.
What happens if my airbag light is still on after I install it?
This is a known GM security procedure. If the light persists, a technician with a high-level scan tool needs to perform a quick ‘Setup SDM Primary Key in BCM’ relearn. This syncs the new BCM to the airbag system and is a simple function found in the scanner’s special functions menu.
Is there a core charge for my old BCM?
No, there is absolutely no core charge. You can keep your old part or recycle it without any hassle or need to ship it back to us.
Will this fix a no-start or stalling problem?
In many cases, yes. The BCM is tied into the vehicle’s anti-theft and security system (Pass-Key). A failing BCM can prevent the vehicle from recognizing the key, leading to a no-start or intermittent stalling condition.
What if I order the wrong part?
We’re here to help! Providing your VIN during checkout allows us to double-check compatibility and ensure you get the correct part the first time. If you have any doubts, contact our expert support team before ordering.