Fix Your Truck’s Electrical Gremlins for Good
If you’re dealing with bizarre electrical issues in your 2003-2007 GMC Sierra 2500, you know how frustrating it can be. One minute the radio works, the next it’s dead. The power windows have a mind of their own, and a mysterious battery drain leaves you stranded. As a technician with over two decades of experience, I’ve seen these exact problems hundreds of times, and a failing Body Control Module (BCM) is often the root cause. This module is the central nervous system for your truck’s body electronics. When it fails, it creates chaos. This replacement BCM, part number 15137394, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play fix.
From the Diagnostic Bay
I remember a customer with an ’05 Sierra 2500 who was about to sell his truck out of frustration. He’d spent months chasing what he thought was a bad ground. His dash lights would flicker, the HVAC blower would quit randomly, and he kept getting a B1001 DTC. He replaced the battery, alternator, and checked every ground he could find. The real culprit? A failing BCM. Once we swapped in a VIN-programmed module like this one, every single issue vanished. It’s a 15-minute fix that can save you hundreds in diagnostic fees and unnecessary parts.
Is Your Sierra Showing These Electrical Faults?
A faulty BCM can manifest in numerous ways. Before you start tearing apart your wiring harness, check if you’re experiencing any of these classic symptoms. A failing 2003-2007 Sierra 2500 BCM is a common cause for:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC controls that don’t respond or a blower motor that works sporadically.
- ✔ An illuminated airbag light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Erratic interior or exterior lights, including headlights and dome lights.
- ✔ Security system malfunctions, causing no-start conditions or false alarms.
- ✔ A parasitic battery drain that kills your battery overnight.
- ✔ Communication loss codes (U-codes) when scanning the vehicle.
A Straightforward Guide to BCM Installation
One of the best features of this module is its simple installation. You don’t need to be a master mechanic to get your truck back in working order. The entire process typically takes less than 15 minutes.
- Safety First: Always disconnect the negative terminal from your truck’s battery to prevent electrical shorts and to help reset the vehicle’s systems.
- Locate the BCM: On most Sierra and Silverado 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 multi-pin connectors.
- Swap the Modules: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Unbolt or unclip the old module from its bracket and set it aside.
- Install the New BCM: Mount your new, VIN-programmed BCM into the 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 your truck and test all body functions—windows, locks, lights, wipers, and HVAC—to confirm the repair was successful.
Post-Installation Note: 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. This is a simple sync process that a local repair shop can perform if needed.
Verified Fitment For Your GM Truck or SUV
This 2003-2007 Sierra 2500 BCM is a direct-fit replacement for a wide range of General Motors vehicles, ensuring OEM-level performance and compatibility. It is interchangeable with part numbers 10383536, 15116066, 15136225, 15136877, 15137393, 15137395, 15137396, 15198116, and more. Please verify your vehicle from the list below:
SIERRA 3500 PICKUP 06 Body Control (BCM); (under steering column), AT, 4 speed (opt MT1), Crew Cab
SAVANA 2500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SIERRA 2500 PICKUP 03-05 Body Control (BCM); (under steering column), Crew Cab
ESCALADE ESV 03-06 Body Control (BCM); (under steering column)
HUMMER H2 04-07 Body Control (BCM); (LH dash)
SIERRA 3500 PICKUP 03-05 Body Control (BCM); (under steering column), Crew Cab
SILVERADO 1500 PICKUP 03-06 Body Control (BCM); (under steering column), Crew Cab
ESCALADE 03-06 Body Control (BCM); (under steering column)
SAVANA 1500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SIERRA 2500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), MT, Crew Cab
SIERRA DENALI 03-06 Body Control (BCM); (under steering column)
SIERRA DENALI 07 Body Control (BCM); classic style (creased door skin), (under steering column)
AVALANCHE 2500 02-06 Body Control (BCM); (under steering column)
YUKON XL 1500 03-06 Body Control (BCM); (under steering column)
ESCALADE EXT 03-06 Body Control (BCM); (under steering column)
SIERRA 1500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
SILVERADO 2500 PICKUP 06 Body Control (BCM); (under steering column), AT, 4 speed (opt MT1), Crew Cab
SILVERADO 2500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), MT, Crew Cab
SILVERADO 3500 PICKUP 06 Body Control (BCM); (under steering column), AT, 4 speed (opt MT1), crew cab
SILVERADO 3500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), MT, crew cab
EXPRESS 1500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
HUMMER H2 03 Body Control (BCM); ID 8116
SAVANA 3500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SUBURBAN 2500 03-06 Body Control (BCM); (under steering column)
EXPRESS 2500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SILVERADO 2500 PICKUP 03-05 Body Control (BCM); (under steering column), Crew Cab
SILVERADO 3500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), AT, 4 speed (opt MT1), crew cab
SIERRA 2500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), AT, 4 speed (opt MT1), Crew Cab
SIERRA 3500 PICKUP 06 Body Control (BCM); (under steering column), MT, Crew Cab
SIERRA 2500 PICKUP 06 Body Control (BCM); (under steering column), MT, Crew Cab
SILVERADO 2500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), AT, 4 speed (opt MT1), Crew Cab
SILVERADO 3500 PICKUP 03-05 Body Control (BCM); (under steering column), crew cab
YUKON XL 2500 03-06 Body Control (BCM); (under steering column)
SILVERADO 3500 PICKUP 06 Body Control (BCM); (under steering column), MT, crew cab
SIERRA 2500 PICKUP 06 Body Control (BCM); (under steering column), AT, 4 speed (opt MT1), Crew Cab
SILVERADO 1500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
TAHOE 03-06 Body Control (BCM); (under steering column)
EXPRESS 3500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SIERRA 1500 PICKUP 03-06 Body Control (BCM); (under steering column), Crew Cab
SIERRA 3500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), AT, 4 speed (opt MT1), Crew Cab
SIERRA 3500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), MT, Crew Cab
SILVERADO 2500 PICKUP 06 Body Control (BCM); (under steering column), MT, Crew Cab
YUKON 03-06 Body Control (BCM); (under steering column)
SUBURBAN 1500 03-06 Body Control (BCM); (under steering column)
Frequently Asked Questions
What does ‘VIN Programmed’ mean for me?
It means we load your truck’s specific Vehicle Identification Number (VIN) and factory options onto the module before shipping. This ensures it works correctly right out of the box, with no expensive trip to the dealership required for programming.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your old module, which saves you the time and expense of return shipping.
My airbag light is on. Will this fix it?
If the airbag light is caused by a faulty BCM (like with a B1001 code), this module will resolve the root cause. However, after installation, the system may require a ‘Setup SDM Primary Key’ procedure with a pro-level scan tool to sync with the airbag system and turn off the light.
Are any special tools required for installation?
No special tools are needed. Basic hand tools, like a socket or nut driver to remove the mounting bolts and a small flathead screwdriver to help with the connector tabs, are all that’s typically required.
Will this BCM work for a regular cab or extended cab truck?
This BCM primarily fits Crew Cab models as listed. Always verify your specific model and options in our fitment list or contact us with your VIN to ensure 100% compatibility before ordering.