Restore Full Control Over Your Truck’s Electronics
Are you battling frustrating electrical problems in your GMC Sierra Denali or other GM truck? When features like your power windows, door locks, or climate control start acting erratically, a failing Body Control Module (BCM) is often the culprit. As the central command center for your vehicle’s body electronics, a faulty BCM can cause a cascade of issues that are difficult to diagnose. This OEM-quality GM 25844480 BCM is the definitive solution, arriving expertly programmed to your vehicle’s VIN for a true plug-and-play repair.
Is Your Truck Experiencing These Electrical Issues?
Over my 20 years in diagnostics, I’ve seen how a single bad BCM can mimic a dozen different problems. Before you waste time and money chasing down individual component failures, see if your truck is showing these classic signs of BCM failure:
- ✔ The HVAC blower motor works intermittently or not at all.
- ✔ Your power windows, door locks, or interior/exterior lights have a mind of their own.
- ✔ An airbag warning light is illuminated on the dash, often with a DTC B1001 stored.
- ✔ The security system malfunctions, causing no-start conditions, stalling, or misfires.
- ✔ You’re getting a variety of communication or body-related Diagnostic Trouble Codes (DTCs).
- ✔ Unexplained battery drain or strange grounding-type problems.
Case Study: The Ghost in the Machine
I once had a 2008 Silverado in the shop with a laundry list of complaints: the radio would cut out, the driver’s window wouldn’t go down, and the dome light would flicker randomly. The owner had already replaced the battery and alternator. A quick scan showed multiple ‘loss of communication’ codes with various modules. Instead of going down a rabbit hole, we checked the BCM. Sure enough, it was failing. Installing a VIN-programmed 2007-2010 Sierra Denali BCM like this one resolved every single issue in under 10 minutes. It’s the central hub, and when it goes, it takes other systems with it.
The Smart Solution: A Pre-Programmed Module
The biggest headache with module replacement has always been the expensive trip to the dealership for programming. We eliminate that step entirely. By providing us with your vehicle’s VIN during checkout, we can program this BCM with the latest GM software specific to your truck. This ensures all factory-installed options work correctly right out of thebox, saving you hundreds of dollars and significant downtime. This isn’t just a replacement part; it’s a complete, ready-to-install solution for your 2007-2010 Sierra Denali BCM failure.
A Straightforward Guide to BCM Installation
For the confident DIYer or professional tech, this installation is remarkably simple and can be done with basic hand tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On most compatible GM trucks and SUVs, the BCM is located under the driver’s side dashboard, near the steering column. It’s often a black box with several large multi-pin connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unclip or unbolt the old BCM from its mounting bracket.
- Install the New BCM: Mount the new BCM and securely plug in all the connectors. You should hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair was successful.
- 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’ procedure. A ‘Brake Pedal Position Relearn’ may also be needed. This is normal and ensures all safety systems are correctly synced.
This module is a direct replacement for multiple part numbers, including: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, and more. Plus, there’s no core charge, so you don’t have to worry about the cost or hassle of sending your old part back.
Verified Vehicle Compatibility List
This BCM is confirmed to fit a wide range of General Motors trucks and SUVs. Please verify your model and year below. Some models may require matching the ID number (e.g., 25835966) from your original part.
- Cadillac Escalade/ESV/EXT: 2007-2011
- Chevrolet Avalanche 1500: 2007-2011
- Chevrolet Silverado 1500/2500/3500: 2007-2013
- Chevrolet Suburban 1500/2500: 2007-2011
- Chevrolet Tahoe: 2007-2011
- GMC Sierra 1500/2500/3500: 2007-2013
- GMC Sierra Denali: 2007-2013
- GMC Yukon/Yukon XL: 2007-2011
Note: For 2007 models, this fits the ‘new style’ with the smooth door skin. Always consult the detailed fitment list or contact us if you are unsure.
Frequently Asked Questions
Do I need to take my truck to the dealer after installing this?
No. This BCM comes pre-programmed to your vehicle’s VIN. This allows for a direct installation without requiring any additional programming from a dealership, saving you time and money.
What does ‘No Core Charge’ mean?
It means you are not required to send your old, faulty BCM back to us. You can keep it or dispose of it yourself, which simplifies the process for you.
Why is my airbag light still on after installation?
This can happen. The new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). A professional technician with an advanced scan tool can perform the ‘Setup SDM Primary Key in BCM’ function to sync the systems and turn off the light.
Is this a difficult part for a DIYer to install?
The physical installation is very straightforward for most DIYers with basic tools, typically taking less than 15 minutes. It’s located under the dash and involves unplugging the old module and plugging in the new one.
Will this fix my specific problem, like the power windows not working?
The BCM controls a wide range of body electronics, including power windows, locks, lights, and HVAC. If your module is faulty, replacing it with this part is the correct repair for those symptoms.