Restore Full Control of Your Truck’s Electronics
If your 2007-2010 GMC Sierra Denali is plagued by baffling electrical problems—like lights that flicker, power windows that won’t budge, or a security system that acts up—the root cause is often a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can create a cascade of frustrating issues. This replacement module, equivalent to part number 22860591, is the definitive solution. We pre-program it to your truck’s specific VIN, ensuring it works perfectly right out of the box, no expensive dealership programming required.
Case Study: The Haunted 2009 Sierra
A customer brought in a 2009 Sierra Denali with a list of symptoms that sounded like a ghost was in the machine: the radio would turn on by itself, the dome light would stay on, and the driver’s side power lock was completely dead. He’d already replaced the battery and checked fuses with no luck. After a quick scan, we saw multiple communication codes pointing to the BCM. Instead of a complex, multi-day diagnostic job, we installed one of our VIN-programmed BCMs. In less than 15 minutes, every single issue was resolved. This is a classic example of how a failing BCM can mimic a dozen other problems, and why a reliable, pre-programmed replacement is the fastest path to a fix.
Is Your Sierra Showing These Electrical Gremlins?
A failing BCM doesn’t always trigger a check engine light. Instead, it manifests as a variety of strange electrical behaviors. From my 20+ years of experience, these are the most common signs that your 2007-2010 Sierra Denali BCM is on its way out:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC blower motor not working or stuck on one speed.
- ✔ Headlights, taillights, or interior lights behaving erratically.
- ✔ An active airbag warning light, often with a DTC B1001 (Setup SDM Primary Key in BCM) code stored.
- ✔ The anti-theft or security system preventing the truck from starting.
- ✔ Unpredictable warning chimes or dashboard messages.
Your 5-Minute Path to a Fully Functional Truck
One of the best features of this module is its simple, straightforward installation. You don’t need to be a master mechanic to get your truck back in order. Just follow these steps:
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on any electrical components.
- Locate the BCM: On most GMT900 platform trucks, including the Sierra Denali, the BCM is located under the driver’s side of the dashboard, near the steering column.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once unplugged, the module can be unclipped or unbolted from its mounting bracket.
- Install the New Module: Seat the new, VIN-programmed BCM into the mounting bracket and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the truck and test all functions: lights, locks, windows, wipers, and the HVAC system to confirm the repair.
- Post-Installation Checks: In some cases, an airbag light may persist. 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. These are simple procedures for any well-equipped shop.
This module comes with a one-year warranty and requires no core charge, so you can keep your old part without any hassle.
Verified Fitment for Your GM Truck or SUV
This BCM is a direct replacement for part number 22860591 and is also interchangeable with several other part numbers, including 25844480, 25835966, and 20939137. It is guaranteed to fit the following vehicles:
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11 (07 new style)
SIERRA 2500 PICKUP 07-13 (07 new style)
SIERRA 3500 PICKUP 07-13 (07 new style)
SIERRA DENALI 07-10
SIERRA DENALI 1500/2500/3500 11-13
SILVERADO 1500 PICKUP 07-11 (07 new style)
SILVERADO 2500 PICKUP 07-13 (07 new style)
SILVERADO 3500 PICKUP 07-13 (07 new style)
SUBURBAN 1500/2500 07-11
TAHOE 07-11
YUKON & YUKON XL 1500/2500 07-11
Why is VIN programming necessary for a BCM?
The BCM communicates with many other modules in your Sierra. Programming it to your VIN ensures it has the correct software and vehicle-specific options (like power seat memory, remote start, etc.) enabled. This makes it a true plug-and-play part and prevents functionality issues.
Can I install this BCM myself?
Absolutely. For most owners, the physical installation is very simple and takes just a few minutes with basic hand tools. The module is typically located under the driver’s side dash. The only potential extra step is if the airbag light requires a reset with a scan tool.
What happens if I don’t replace a failing BCM?
A failing BCM will only get worse. What starts as a minor annoyance, like an intermittent window, can escalate into a no-start condition due to security system failure, leaving you stranded. It can also cause premature wear on other components like the battery or blower motor.
Will this fix an airbag light with a B1001 code?
Yes, a faulty BCM is a common cause of the B1001 code. Replacing the module is the correct repair. However, after installation, the new BCM and the airbag system’s Sensing and Diagnostic Module (SDM) must be synced. This is done with a scan tool using the ‘Setup SDM Primary Key’ function.
Is there a core charge for this part?
No. We do not require you to send your old BCM back. There is no core charge, saving you time and return shipping costs.