Is Your GM Truck or Van Acting Possessed?
Are you dealing with flickering lights, power windows and locks with a mind of their own, or a security light that won’t turn off? These frustrating and seemingly random electrical gremlins are classic signs of a failing Body Control Module (BCM). In many 2003-2007 GM trucks and vans, the BCM is the electronic nerve center for all these functions. When it fails, your reliable workhorse can become a source of daily annoyance.
From the Shop Floor: A Real-World Diagnosis
“A customer’s 2005 Silverado 2500 came in last week with the dome lights staying on constantly and the radio cutting out intermittently. He was convinced it was a wiring short somewhere in the dash. After a quick scan, we saw multiple communication codes pointing to the BCM. On these GMT800 platforms, I’ve seen dozens of these failures, often caused by water intrusion from a leaky windshield seal that drips directly onto the module. We swapped in a pre-programmed BCM, and all the bizarre issues vanished instantly. It’s a fix I’ve done countless times, and it saves the customer a fortune compared to a dealership repair.”
The Direct Solution: A Pre-Programmed 2003-2007 GM BCM
Don’t let a faulty module keep you guessing. This Body Control Module, part number 15198115, is the definitive solution for your vehicle. We take the hassle out of the repair by pre-programming the unit with the latest GM software specifically for your vehicle’s VIN. This means it arrives at your door ready for installation, with no need for an expensive trip to the dealership for programming.
Common Symptoms of a Failing BCM:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights staying on or not working at all.
- ✔ The security or anti-theft system preventing the vehicle from starting.
- ✔ Erratic behavior from the radio or instrument cluster gauges.
- ✔ False warning messages on the driver information center.
- ✔ Communication error codes stored in the vehicle’s computer system.
Easy Installation and Critical Post-Install Procedures
Replacing the 2003-2007 GM BCM is a straightforward job for a DIYer with basic tools. Follow these steps to get your truck or van back in order.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the Module: On Silverado and Sierra pickups, the BCM is typically found under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s usually located in the center of the dash.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New BCM: Mount the new, pre-programmed BCM in the same location and securely re-attach all electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect Power: Re-attach the negative battery terminal.
- IMPORTANT – Post-Installation Steps: After the physical installation, a few final electronic handshakes are required for full functionality. This is not a defect, but a necessary security and safety procedure.
- Airbag System Reset: The airbag warning light will likely be on. You must perform the ‘Setup SDM Primary Key in BCM’ procedure using a compatible bi-directional scan tool. This re-establishes communication between the new BCM and the airbag system.
- Brake Pedal Position Sensor: Some vehicles may require a ‘Brake Pedal Position Sensor Relearn’ procedure. If you notice any issues with brake light operation or cruise control, this step is necessary.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles and part numbers. Simply provide your VIN at checkout, and we handle the rest. This unit is compatible with the following part numbers:
15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689
It fits a broad selection of 2003-2007 Silverado, Sierra, Express, Savana, and SSR models. Please refer to the detailed fitment list to confirm your specific vehicle and options. Stop throwing parts at electrical problems and get the correct, programmed solution delivered to your door.