Is Your 2011 Sierra Plagued by Electrical Gremlins?
If you’re dealing with baffling electrical issues in your GMC Sierra—like power windows that won’t budge, a temperamental HVAC system, or dashboard warning lights that have a mind of their own—a failing Body Control Module (BCM) is the most likely culprit. The BCM is the central command center for your truck’s body electronics. When it fails, it can cause a cascade of frustrating and seemingly unrelated problems. This OEM-quality replacement BCM, part number 15263363 (interchangeable with 25844480 and others), is the definitive solution to restore your truck’s full functionality.
From the Diagnostic Bay
We had a 2011 Sierra 2500 roll in that was a textbook case of BCM failure. The owner was frustrated with an airbag light that wouldn’t go off (DTC B1001), intermittent wipers, and door locks that worked only when they wanted to. After confirming the grounds were solid, we installed one of our VIN-programmed BCMs. The installation took less than five minutes. Upon starting the truck, the locks and wipers worked perfectly. We performed the quick ‘Setup SDM Primary Key’ procedure with our scanner, and the airbag light vanished. The customer drove away with a truck that felt brand new again, all without a costly trip to the dealership.
Symptoms of a Failing GMC Sierra BCM
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or failing to turn on.
- ✔ HVAC and climate control functions not responding or blower motor issues.
- ✔ Persistent airbag warning light, often with a B1001 diagnostic trouble code.
- ✔ Vehicle security system malfunctions, causing no-start or stalling conditions.
- ✔ Inconsistent windshield wiper operation.
The Plug-and-Play Solution: A Pre-Programmed 2011 Sierra Body Control Module
Don’t waste time and money at the dealership. We simplify the repair process by pre-programming this module to your truck’s specific Vehicle Identification Number (VIN). This critical step ensures that the BCM communicates flawlessly with your vehicle’s other electronic systems right out of the box. It arrives loaded with the latest GM software updates, providing a reliable, long-term fix that requires no further programming. Simply install it, perform any necessary post-install procedures, and get back on the road.
This module is a direct replacement for a wide range of part numbers, including: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
What does a Body Control Module do on a 2011 GMC Sierra?
The BCM acts as the brain for your truck’s body electronics. It manages non-engine related functions like power windows, door locks, the security system, interior and exterior lighting, wipers, and the HVAC system.
Is this BCM ready to install out of the box?
Yes! This is a key benefit. We program the module to your vehicle’s VIN before shipping, so it’s ready for a plug-and-play installation without requiring a trip to the dealer for programming.
Will this fix my airbag light with code B1001?
A faulty BCM is a very common cause of the B1001 code. Replacing it often resolves the issue, but you may need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool to sync the new BCM with the airbag system and clear the light.
Where is the BCM located on my 2011 Sierra?
The Body Control Module is typically located under the driver’s side of the dashboard, near the steering column. It’s an accessible location that makes for a quick replacement.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your old module, which saves you the time and hassle of a return shipment.