Is Your GM Truck or Van Acting Possessed?
Are you chasing electrical gremlins in your Silverado, Sierra, Express, or Savana? One minute the power windows work, the next they don’t. The security light flashes for no reason, the radio acts up, or worse, you have an intermittent no-start condition that leaves you stranded. These frustrating, unpredictable issues often point to one culprit: a failing Body Control Module (BCM).
The BCM is the central command center for your vehicle’s body electronics. When it starts to fail, it can cause a cascade of bizarre problems that are difficult to diagnose. Don’t waste time and money replacing batteries, starters, or switches. This VIN-programmed BCM is the direct, reliable solution to restore order to your vehicle’s electrical system.
The Simple, Dealer-Free Solution
Forget about expensive dealership visits and the hassle of towing your vehicle for programming. We handle the complex part for you. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash this module with the latest official GM software specific to your truck or van. It arrives at your door ready for a straightforward installation, saving you hundreds of dollars in labor and programming fees.
Common Symptoms of a Failing 2003-2007 GM BCM:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting (dome lights staying on, headlights flickering).
- ✔ False security system alarms or a persistent anti-theft light.
- ✔ A/C and heater blower motor control issues.
- ✔ Unexplained parasitic battery drain that kills your battery overnight.
- ✔ Intermittent no-crank or no-start conditions.
- ✔ Warning lights on the dash, including the airbag light.
From the Shop Floor: A Real-World Diagnosis
“A customer’s ’05 Silverado 2500 came in last month with a dead battery every morning. He’d already replaced the battery and alternator, but the problem persisted. We ran a parasitic draw test and found a significant drain, but couldn’t pinpoint it to a specific fuse. On these GMT800 platforms, I’ve seen this dozens of times. The BCM fails internally and keeps one of the data networks ‘awake,’ preventing other modules from going to sleep. It’s a classic ghost drain that fools a lot of people. We installed a pre-programmed BCM, and the draw disappeared instantly. It’s a fix that saves customers from chasing their tails for weeks.”
Plug-and-Play Installation Guide
Installing your new BCM is a manageable DIY job. While the exact location varies slightly between trucks (under the steering column) and vans (center dash), the process is similar.
- Safety First: Always disconnect the negative battery terminal and wait 10-15 minutes for the system capacitors to discharge.
- Locate the BCM: On Silverado/Sierra pickups, it’s typically mounted to a bracket left of the steering column. On Express/Savana vans, it’s usually behind the center dash trim.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so don’t force them. Once disconnected, unbolt the module from its bracket.
- Install the New Module: Mount your new, pre-programmed BCM and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- CRITICAL Final Steps: After installation, two procedures are required. These must be performed with a compatible high-end diagnostic scan tool (not a basic code reader):
- Airbag System: Perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the BCM with the airbag module (SDM) and will turn off the airbag warning light.
- Brake System: Some vehicles may require a ‘Brake Pedal Position Sensor Calibration’ to ensure proper brake light and ABS function.
This module is a direct replacement for part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. Please verify fitment for your specific model and options before ordering.