Tired of Chasing Electrical Gremlins in Your GM Truck?
If you’re dealing with a 2003-2007 GMC Sierra 1500 Pickup that’s acting possessed—lights flickering, windows refusing to budge, or the A/C quitting on a hot day—you’ve likely met the frustrating reality of a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause a cascade of baffling issues. This isn’t just an annoyance; it can affect your vehicle’s security and safety. This replacement module, identified by part number 15194170 and its interchanges, is the definitive solution.
From the Diagnostic Bay: The Case of the Haunted Sierra
I remember a customer bringing in his ’05 Sierra, completely fed up. His dashboard was a light show, the radio would cut out, and his power locks had a mind of their own. He’d already replaced the battery and checked the grounds, but the problems persisted. After a quick scan, we saw a handful of communication codes pointing to the BCM. Instead of a costly dealership visit for programming, we provided him with a cloned module. It was a 10-minute swap for him in his driveway. The relief on his face when everything just *worked* again was proof that the right part makes all the difference.
What is a Cloning Service and Why Do You Need It?
This isn’t just a generic, off-the-shelf part. Our unique Cloning Service makes this a true plug-and-play repair. We transfer the essential data from your original, failing module directly onto this replacement unit. This process ensures that all your truck’s specific options—from keyless entry to the exact HVAC system settings—are perfectly preserved. You get a module that is 100% matched to your vehicle’s VIN and equipment, eliminating the need for expensive dealership programming or complex relearn procedures. It’s the most reliable way to restore full functionality without creating new problems.
Is Your Truck Showing These Signs of BCM Failure?
- ✔ The security light is on, and the engine won’t start (anti-theft system issues).
- ✔ Power windows, door locks, or interior lights work intermittently or not at all.
- ✔ The HVAC blower motor is erratic, or the climate controls are unresponsive.
- ✔ You have an airbag warning light on the dash, often with a DTC like B1001 (Setup SDM Primary Key in BCM).
- ✔ The instrument cluster acts erratically or goes dark.
- ✔ Wipers operate on their own or won’t turn off.
- ✔ A collection of seemingly unrelated diagnostic trouble codes (DTCs) are present.
Your Straightforward 5-Minute Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your truck’s battery before starting work.
- ✔ Locate the BCM: On most Sierra, Silverado, and SUV models, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large electrical connectors.
- ✔ Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have release tabs that need to be pressed. Remove the old module (it’s typically held by a couple of small bolts or clips) and install the new one in its place.
- ✔ Reconnect and Test: Securely plug the connectors into your new module. Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair.
- ✔ Post-Install Checks: In some cases, an ‘Airbag System Sync’ or ‘Brake Pedal Position Relearn’ may be needed if related warning lights appear. This requires a professional-grade scan tool but is often not necessary due to our cloning service.
Will This Fit My GM Vehicle?
This BCM is a direct-fit replacement for a wide range of General Motors trucks and SUVs. While this page focuses on the 2003-2007 Sierra 1500 BCM, it is also compatible with the following models. Always verify your part number for a perfect match.
CHEVROLET SILVERADO 1500/2500/3500 (2003-2007 Classic)
CHEVROLET SUBURBAN 1500/2500 (2003-2006)
CHEVROLET TAHOE (2003-2006)
CHEVROLET EXPRESS VAN 1500/2500/3500 (2004-2007)
GMC SIERRA 1500/2500/3500 & DENALI (2003-2007 Classic)
GMC YUKON & YUKON XL 1500/2500 (2003-2006)
GMC SAVANA VAN 1500/2500/3500 (2004-2007)
CADILLAC ESCALADE, ESV, EXT (2003-2006)
HUMMER H2 (2003-2007)
Interchangeable Part Numbers: 10383536, 15116066, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, 15194170
What is the benefit of a cloning service?
Cloning transfers your vehicle’s exact configuration and security data to the new module. This avoids the need for a dealership visit for programming, making the installation a simple plug-and-play process that preserves all your original factory options.
Will I have to send my original BCM in?
Yes. The cloning service requires your original module to read the data. After you place your order, we will provide instructions for sending it to us. We then clone it to the new unit and ship both back to you.
What if the airbag light is on after I install the new BCM?
This can happen if the BCM and the airbag’s Sensing and Diagnostic Module (SDM) lose sync. A professional technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a diagnostic tool to resolve this.
Is there a core charge for this part?
No. There is no core charge. Your original module is required for the data transfer and will be returned to you along with your newly programmed replacement, so you can keep it.
Where is the BCM located on my 2005 Sierra 1500?
On the 2003-2007 Sierra/Silverado platform, the BCM is typically found under the driver-side dashboard, to the left of the steering column. It is a black plastic box with three or more large electrical connectors.