Restore Full Electrical Control to Your GM Truck
Are you chasing down bizarre electrical problems in your 2003-2007 GMC Sierra 3500? From flickering lights and a dead instrument cluster to power windows that have a mind of their own, a failing Body Control Module (BCM) is often the culprit. As the central command for your truck’s body electronics, its failure can be incredibly frustrating. This replacement module, part number 15194170, combined with our expert cloning service, is the definitive solution to get your truck back in reliable working order without a trip to the dealership.
Our unique Cloning Service makes this repair simple. You send us your original BCM, and we professionally transfer all the critical vehicle-specific data—including VIN, mileage, and security information—to this replacement unit. The result is a true plug-and-play module. When you receive it back, simply install it, and all original functions are restored. This process eliminates the need for expensive and time-consuming dealer reprogramming with a Tech2 scanner, saving you time and money.
A Technician’s Notebook: The Intermittent Fault Fiasco
I remember a 2006 Sierra 2500HD that came into my bay with a list of complaints that made no sense together. The radio would cut out, the driver’s side power lock wouldn’t work, and the HVAC blower was intermittent. The customer had already replaced the battery and checked all the fuses. After ruling out grounding issues, we connected a scope to the communication lines on the BCM. We saw erratic data packets and voltage drops that pointed directly to an internal failure in the module. Instead of a costly new unit and programming, we used a cloned 2003-2007 Sierra 3500 BCM. The customer had his truck back the next day, fully functional, for a fraction of the dealer’s quote.
Is Your Sierra 3500 Showing These Electrical Faults?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is your likely solution:
- ✔ Non-functional or erratic power windows, door locks, or interior/exterior lights.
- ✔ The security system acts up, causing a no-start condition or random alarm activation.
- ✔ HVAC controls are unresponsive, or the blower motor works only on certain speeds.
- ✔ An airbag warning light is illuminated on the dash, often with a DTC like B1001 (Option Configuration Error).
- ✔ Communication errors with other modules on the vehicle’s network.
- ✔ Strange parasitic battery drain that you can’t trace to a specific circuit.
Your Straightforward Installation Guide
Swapping the BCM is a quick job for any DIYer or professional. It’s typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your truck’s battery before beginning any electrical work.
- Locate the BCM: On most GMT800 platform trucks, you’ll find it mounted to a bracket under the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat the replacement BCM into the bracket and securely plug in all the electrical connectors until they click.
- Reconnect Power: Reattach the negative battery terminal.
- Post-Installation Checks: Start the vehicle and verify that all functions (lights, locks, windows, etc.) are working correctly. In some cases, a ‘Setup SDM Primary Key in BCM’ or ‘Brake Pedal Position Relearn’ may be needed if you see related warning lights. This requires a professional scan tool.
Verified Fitment for Your GM Truck or Van
This module is a direct replacement for part number 15194170 and other interchangeable parts, ensuring compatibility with a wide range of GM vehicles. Please verify your part number and vehicle model before ordering.
AVALANCHE 2500 02-06 Body Control (BCM); (under steering column)
ESCALADE & ESV & EXT 03-06 Body Control (BCM); (under steering column)
HUMMER H2 03-07 Body Control (BCM); (LH dash)
EXPRESS/SAVANA VAN 1500/2500/3500 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 1500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
SIERRA 2500 PICKUP 03-06 Body Control (BCM); (under steering column), Crew Cab
SIERRA 2500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
SIERRA 3500 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), Crew Cab
SIERRA DENALI 03-07 Body Control (BCM); classic style (creased door skin), (under steering column)
SILVERADO 1500 PICKUP 03-06 Body Control (BCM); (under steering column), Crew Cab
SILVERADO 1500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
SILVERADO 2500 PICKUP 03-06 Body Control (BCM); (under steering column), Crew Cab
SILVERADO 2500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), Crew Cab
SILVERADO 3500 PICKUP 03-06 Body Control (BCM); (under steering column), crew cab
SILVERADO 3500 PICKUP 07 Body Control (BCM); classic style (creased door skin), (under steering column), crew cab
SUBURBAN 1500/2500 03-06 Body Control (BCM); (under steering column)
TAHOE 03-06 Body Control (BCM); (under steering column)
YUKON & YUKON XL 1500/2500 03-06 Body Control (BCM); (under steering column)
Frequently Asked Questions
What is a “Cloning Service” and how does it work?
Our Cloning Service is a simple process where you mail your original BCM to us. We use specialized equipment to read all the vehicle-specific data and transfer it to your replacement module. This makes the new part a perfect electronic match for your truck, eliminating any need for dealership programming.
Do I need to take my truck to a dealer after installation?
No. Because we clone your original module’s data, the replacement BCM is ready for immediate installation and operation. This service is designed specifically to help you avoid a trip to the dealer.
What happens to my original BCM?
We always return your original module to you along with the newly programmed replacement. We do not keep your old part, so there is no core charge or hassle.
My airbag warning light came on after I installed the new BCM. What should I do?
This can sometimes happen. It means the BCM and the airbag system (SDM) need to be electronically re-synced. A professional mechanic will need to perform the “Setup SDM Primary Key in BCM” procedure with a compatible diagnostic tool to clear the light.
Is this part difficult to replace myself?
Not at all. For anyone with basic hand tools and a little confidence, this is a very straightforward job that usually takes less than 30 minutes. It’s typically located under the dash and held in by a few bolts or clips.