Restore Full Functionality to Your GM Truck or Van
Are you battling bizarre electrical issues in your Silverado, Sierra, or Express van? Things like flickering interior lights, power windows with a mind of their own, or random warning messages on the dash can be incredibly frustrating. More often than not, the culprit is a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, when the BCM starts to go, it can create a cascade of confusing problems. This isn’t just an annoyance; it can affect vehicle security and safety systems. This replacement 2003-2007 GM BCM is the reliable, long-term solution to get your truck or van back to normal.
From the Diagnostic Bay
I remember a 2005 Silverado 2500 that came into my shop with a laundry list of complaints. The owner said his radio would turn off randomly, the dome light wouldn’t work, and the security light was always on, sometimes preventing the truck from starting. He’d already replaced the battery and checked all the fuses. A quick scan showed a dozen communication error codes (U-codes) pointing to the BCM. Instead of a costly trip to the dealership for a new module and programming fees, we installed one of these pre-programmed units. The key is providing the VIN upfront. The module arrived ready to go, we swapped it in 30 minutes, and every single electrical gremlin was gone. It’s a textbook fix I’ve performed hundreds of times.
Is Your GM Vehicle Showing These Symptoms?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your BCM needs replacement:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t work at all.
- ✔ The security or anti-theft system light stays illuminated, or the vehicle won’t start.
- ✔ Inaccurate or erratic gauge behavior on the instrument cluster.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140 (Lost Communication With Body Control Module).
- ✔ Malfunctioning remote keyless entry (RKE) system.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a DIYer with basic tools. Our pre-programming service eliminates the most difficult step, saving you a trip to the dealer.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most Silverado and Sierra pickups, the BCM is located under the driver’s side of the dashboard, near the steering column. For Express and Savana vans, it’s typically found behind the center dash panel.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical harnesses. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Relearns (If Needed): Start the vehicle. In some cases, you may need to perform a post-installation procedure like an airbag system sync or brake pedal position relearn, as detailed below.
What to Expect After Installation
Because this 2003-2007 GM BCM comes programmed to your vehicle’s specific VIN, most functions will work immediately. However, for full system integration, a couple of additional steps may be required:
- Airbag System Sync: If your airbag warning light is on after installation, a simple “Setup SDM Primary Key in BCM” procedure is needed. This requires a professional-grade scan tool to sync the new BCM with the airbag module.
- Brake Pedal Position (BPP) Relearn: On some models, a BPP sensor relearn might be necessary to ensure correct brake light operation and to prevent issues with the traction control system.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit the following models:
SILVERADO 1500/2500/3500 PICKUP (2003-2007 Classic Style, exc. Crew Cab)
EXPRESS 1500/2500/3500 VAN (2003-2007, check options)
SSR (2003-2006)
GMC:
SIERRA 1500/2500/3500 PICKUP (2003-2007 Classic Style, exc. Crew Cab)
SAVANA 1500/2500/3500 VAN (2003-2007, check options)
Note: Please refer to the detailed fitment list in the original description to confirm compatibility with your specific trim and options.
Frequently Asked Questions About This 2003-2007 GM BCM
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is absolutely no core charge for this part. You can keep your original module, which can be helpful if you ever decide to sell the vehicle with its original components.
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your vehicle’s 17-digit VIN. We will program the BCM with the latest GM software specific to your truck or van before shipping it out.
Is this a plug-and-play part?
For the most part, yes. We handle the programming, which is the most complex step. You just need to physically install it. As noted, some vehicles may require a simple relearn procedure for the airbag or brake systems, which can be done with a common bi-directional scan tool.
Will this fix my ‘Service 4WD’ light?
In many cases, yes. A failing BCM can send erroneous data to other modules, causing false warnings like ‘Service 4WD’ or ‘Service ABS System’. Replacing a faulty BCM often resolves these phantom messages.
What tools do I need for the installation?
You’ll typically only need basic hand tools, such as a socket set and a trim removal tool, to access and replace the module. No special programming equipment is required on your end.