Restore Control Over Your GM Truck’s Electronics
Are you dealing with baffling electrical issues in your GM truck or van? Intermittent power windows, flickering lights, a security system that acts up, or door locks with a mind of their own are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can turn your reliable workhorse into a source of daily frustration. This replacement BCM is the straightforward, reliable solution to get your vehicle’s features working correctly again.
We take the biggest hassle out of the repair process: programming. Simply provide your vehicle’s VIN during checkout, and our technicians will flash this module with the latest GM software specific to your truck. This means it arrives at your door ready for installation, saving you the time, expense, and headache of a dealership visit. It’s a direct-fit replacement for part number 15136224 and several other common part numbers, ensuring a seamless repair.
Common Signs of a Failing BCM
- ✔ Power windows, mirrors, or locks operating erratically or not at all.
- ✔ Interior dome lights or exterior lights staying on or not turning on.
- ✔ The security system or horn activating randomly.
- ✔ Inconsistent or non-functional dashboard warning lights.
- ✔ Communication error codes with other modules (e.g., U-series codes).
- ✔ Wipers behaving unpredictably.
From the Diagnostic Bay: The Case of the Haunted Sierra
A customer brought in his ’05 Sierra 2500, convinced it was possessed. The radio would switch off, the dome light would flicker while driving, and the driver’s side power window would only work on Tuesdays—or so it seemed. He’d already replaced the window switch and checked fuses. After plugging in my scan tool, I noticed multiple communication loss codes with the door modules. Instead of chasing individual components, I went straight to the BCM. These modules are notorious for developing internal connection failures over time, causing exactly this kind of random, frustrating behavior. We installed a VIN-programmed BCM, and instantly, all the gremlins were gone. It’s a fix I’ve done hundreds of times; the symptoms seem complex, but the solution is often this central module.
A Straightforward Guide to Installation
Replacing the BCM in most of these trucks and vans is a job a confident DIYer can handle. While the exact location can vary between a truck (under the steering column) and a van (center dash), the process is generally similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On Sierra/Silverado models, this is typically under the driver’s side dashboard, near the steering column. On Express/Savana vans, it’s often behind a panel in the center dash area.
- Remove Trim Panels: Carefully remove any plastic trim or panels necessary to access the module.
- Disconnect and Remove: The BCM is held in by a few bolts or clips. Unplug the electrical connectors (they have locking tabs, so don’t force them) and remove the old module.
- Install the New BCM: Mount the new, pre-programmed BCM in place and securely reconnect all electrical connectors.
- Reconnect and Test: Re-assemble the trim panels and reconnect the battery terminal. Start the vehicle and test all body functions—lights, locks, windows, etc.
Important Post-Installation Note: In some cases, additional steps may be needed. If your airbag light is on, a shop with a high-end scan tool will need to perform an ‘Airbag System Sync.’ Similarly, a ‘Brake Pedal Position Relearn’ might be required for proper brake light and traction control function. These procedures are not always necessary but are good to be aware of.
Will This Fit My Vehicle?
This module is a direct replacement for part number 15136224 and is interchangeable with the following part numbers: 15167329, 15194169, 15747545, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit the following models and options:
- Chevrolet Silverado & GMC Sierra 1500/2500/3500 (2003-2007 Classic): Body Control (BCM); under steering column, excluding Crew Cab models. Please verify transmission options for 2006-2007 models as listed.
- Chevrolet Express & GMC Savana 1500/2500/3500 (2003-2007): Body Control (BCM); located in the center dash. Excludes models with the commercial tradesman package from 2004-2007.
- Chevrolet SSR (2003-2006): Body Control (BCM).
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. We handle the programming for you before we ship the part. Just provide your vehicle’s VIN at checkout, and it will arrive ready to install with the latest GM software.
What is a core charge?
A core charge is a deposit you pay until you return your old part. We have a NO CORE CHARGE policy, so you can keep your original module without any extra fees.
Where is the BCM located on my 2005 Sierra 2500?
On most 2003-2007 Sierra and Silverado pickups, the BCM is located under the driver’s side of the dashboard, to the left of the steering column.
Will I need special tools for the installation?
Basic hand tools like a socket set and trim removal tools are all that’s typically required. No special diagnostic tools are needed for the initial installation, though in some cases, a relearn procedure may be necessary post-install.
What if my airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be synced with the airbag’s computer (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.