Regain Control Over Your Truck’s Electronics
Are you battling bizarre electrical issues in your GMC Sierra or other GM truck? Flickering lights, a dead climate control panel, or power windows with a mind of their own are classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s comfort and convenience features, a faulty BCM can make driving a frustrating experience. This replacement module, equivalent to GM part 15901388, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a true plug-and-play fix.
Case Study: A Tricky Diagnosis
I remember a 2011 Sierra Denali 1500 rolling into my bay with a laundry list of complaints from the owner. The radio would cut out, the driver’s side power lock was unresponsive, and the ‘Service Airbag’ message was on. His scanner pulled a B1001 code, but he’d already tried replacing a few fuses and relays with no luck. The symptoms were all over the place, a hallmark of BCM failure. We confirmed the main power and ground feeds to the module were solid, pointing decisively to an internal BCM fault. Installing a VIN-programmed unit like this one cleared all the codes and restored every function in under 10 minutes. It’s a common failure, but one with a very straightforward fix.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your BCM is the culprit:
- ✔ Unresponsive or intermittent HVAC and climate controls.
- ✔ Power windows, door locks, or interior/exterior lights not working correctly.
- ✔ The security system acting up, causing no-start or stalling conditions.
- ✔ An active airbag warning light, often with Diagnostic Trouble Code (DTC) B1001.
- ✔ Erratic wiper operation or a horn that won’t work.
- ✔ Communication error codes with other modules on the network.
A Straightforward Guide to Installation
Replacing the 2011 Sierra Denali 1500 BCM is a job most DIYers can handle in their driveway. The module is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most GM trucks of this era, you’ll find it attached to a bracket under the dash. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unclip or unbolt the old module from its mounting position.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and securely reconnect all electrical harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions: lights, locks, windows, HVAC, etc.
Post-Installation Note: In some cases, particularly if you had an airbag light, the system may need to be synchronized. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. A Brake Pedal Position relearn may also be needed for certain models to ensure proper brake light and stability control function.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15901388 and other interchangeable numbers, ensuring broad compatibility across the GM truck and SUV lineup. It is confirmed to fit the following vehicles:
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11 (07 New Body Style)
SIERRA 2500/3500 PICKUP 07-13 (07 New Body Style)
SIERRA DENALI 1500 07-11 (07 New Body Style)
SIERRA DENALI 2500/3500 11-13
SILVERADO 1500 PICKUP 07-11 (07 New Body Style)
SILVERADO 2500/3500 PICKUP 07-13 (07 New Body Style)
SUBURBAN 1500/2500 07-11
TAHOE 07-11
YUKON & YUKON XL 1500/2500 07-11
This module is interchangeable with part numbers: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 20939137, 20939138, 22860591.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for me?
It means we load your vehicle’s specific identification number (VIN) and factory settings onto the module before shipping. This ensures it communicates perfectly with your truck’s other systems right out of the box, eliminating the need for an expensive programming service at a dealership.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your old module, saving you the time and hassle of shipping it back.
My airbag light is on. Will this fix it?
If the airbag light is caused by a faulty BCM (like with code B1001), this part will resolve the root cause. However, after installation, you may need a technician with a high-level scan tool to perform an ‘SDM Key Sync’ to clear the light from the dash.
Can I install this BCM myself?
Absolutely. For most DIYers with basic tools, the physical installation is very straightforward and takes just a few minutes. It’s located under the dash and involves unplugging the old unit and plugging in the new one.
What functions does the BCM control?
The Body Control Module is the brain for most of your vehicle’s non-engine electronics. This includes interior and exterior lighting, power windows and locks, the security system, climate controls (HVAC), wipers, and more.