Tired of Chasing Electrical Gremlins in Your GM Truck or Van?
As a technician with over two decades of diagnostic experience, I’ve seen it all. A 2005 Silverado comes into the shop with flickering headlights, a radio that has a mind of its own, and power windows that work one minute and not the next. The owner has replaced the battery and checked all the fuses, but the problems persist. This kind of frustrating, intermittent electrical chaos almost always points to one culprit: a failing Body Control Module (BCM).
The BCM is the central command center for your vehicle’s body electronics. It manages everything from your interior lights and power locks to the security system and instrument cluster. When it starts to fail, it can create a cascade of bizarre issues that are difficult to pin down. This isn’t just an annoyance; a faulty BCM can affect safety systems and even leave you stranded.
This is your direct, reliable solution. We offer a genuine replacement 2003-2007 GM BCM, part number 15167329, that arrives at your doorstep pre-programmed and ready for installation. We take your vehicle’s VIN and flash the module with the latest GM software, ensuring perfect communication with your truck or van’s existing systems. This eliminates the need for an expensive trip to the dealership for programming, saving you both time and money.
A Technician’s Notebook
A customer brought in his 2006 Sierra 2500 complaining that the ‘Service 4WD’ light would come on randomly and his power door locks were completely dead. He’d spent a weekend checking wiring harnesses and grounds with no luck. We hooked up our scan tool and found a slew of communication error codes pointing away from the BCM. However, experience told me to look closer. The BCM is the gateway for these systems. On a hunch, we connected a test BCM and all the problems vanished instantly. The internal logic board on his original BCM had failed. We installed one of our pre-programmed units, performed the quick post-install procedures, and had him back on the road in under an hour. It’s a classic failure mode for these vehicles.
Is Your GM Truck or Van Showing These Signs?
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Flickering or erratic interior and exterior lights.
- ✔ Instrument cluster gauges behaving strangely or not working at all.
- ✔ The security light stays on, or the vehicle won’t start due to a false theft-deterrent activation.
- ✔ Unpredictable warning messages on the driver information center (DIC).
- ✔ A/C and heater controls not responding correctly.
- ✔ Communication error codes (U-codes) stored when scanned.
A Straightforward Guide to BCM Installation
Installing your new 2003-2007 GM BCM is a manageable job for a confident DIYer or any professional mechanic. Since we’ve handled the programming, the physical swap is all that’s left.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electrical components.
- Locate the Module: On Silverado and Sierra pickups, the BCM is typically located under the driver’s side of the dashboard, near the steering column. For Express and Savana vans, it’s usually found behind the center dash trim.
- Remove the Old BCM: Carefully disconnect the electrical connectors. These have locking tabs that need to be depressed. Once unplugged, 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 the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- CRITICAL Post-Install Steps: After installation, two procedures may be required. An airbag light will likely be on; this is normal. It must be cleared by performing the ‘Setup SDM Primary Key in BCM’ procedure with a professional-grade scan tool. Additionally, some vehicles may need a Brake Pedal Position Sensor recalibration to ensure proper brake light and ABS function.
Verified Fitment For Your 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 (excluding certain options as noted):
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- GMC Sierra 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Express 1500/2500/3500 Van (2003-2007)
- GMC Savana 1500/2500/3500 Van (2003-2007)
- Chevrolet SSR (2003-2006)
Please verify the specific options listed in the original fitment data to ensure compatibility with your exact truck or van configuration (e.g., Crew Cab exclusions, transmission types).
Frequently Asked Questions about the 2003-2007 GM BCM
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) is essential because it allows us to program the BCM specifically for your vehicle’s factory options, like the type of transmission, 4WD system, and power accessories. This ensures a true plug-and-play installation without a trip to the dealer.
Is this a difficult part to replace myself?
For someone with basic mechanical skills, it is a very manageable job. The main challenge is accessing the module under the dash. Since the programming is done for you, no special computer knowledge is needed for the installation itself. However, you will need a capable scan tool for the post-install procedures.
What happens if I don’t do the post-install procedures?
If you don’t perform the ‘Setup SDM Primary Key’ procedure, the airbag warning light will remain illuminated on your dash, and the supplemental restraint system may not function correctly. The brake pedal recalibration ensures your brake lights and related safety systems operate as designed. These steps are critical for safety.
Will this fix my ‘Security’ light issue?
In many cases, yes. The BCM is a core part of the GM Passlock/Passkey security system. A failing BCM is a very common reason for the security light to stay on and cause a no-start condition. This pre-programmed module restores that functionality.
Is this a new or used part?
This is a high-quality, inspected, and tested used OEM part that has been expertly programmed with the latest software for your vehicle, offering a reliable and cost-effective solution.