Is Your GM Truck or Van Acting Possessed?
Are you dealing with a cascade of bizarre electrical problems? Flickering dashboard lights, power windows with a mind of their own, door locks that work intermittently, or a security light that won’t turn off? Before you start questioning your sanity, the culprit is likely a failing Body Control Module (BCM). In my 20+ years turning wrenches and diagnosing these exact vehicles, I’ve seen how a faulty BCM can turn a reliable workhorse into a source of constant frustration. It’s the central nervous system for your vehicle’s comfort and convenience features, and when it goes, chaos ensues.
Real-World Diagnosis: The Water-Damaged BCM
“A customer’s 2005 Silverado 2500 came into the shop last month with a classic case. The radio would cut out, the dome light would stay on, and sometimes the truck wouldn’t start, showing a ‘Security’ message. The owner had already replaced the battery and checked the alternator. After pulling the lower dash panel, I found the tell-tale signs of water intrusion on the BCM connectors—a common issue from a leaking windshield seal on these trucks. The corrosion had compromised the internal circuits. Replacing the BCM was the only fix, and this pre-programmed unit would have saved him a tow to the dealer and hundreds in programming fees.”
The Direct Solution: A Plug-and-Play BCM Programmed for You
Forget expensive dealership visits and the hassle of finding a shop with the right equipment. We take the guesswork and complexity out of the repair. Simply provide us with your vehicle’s VIN during checkout, and we will program this BCM with the latest GM software specific to your truck or van. It arrives at your door ready for installation, restoring full functionality right out of the box.
Symptoms a Failing BCM Can Cause:
- ✔ Erratic or non-functional power windows, mirrors, and door locks
- ✔ Interior or exterior lights staying on or not working at all
- ✔ The security system preventing the vehicle from starting
- ✔ Inoperative radio or climate controls
- ✔ False warning lights on the instrument cluster
- ✔ Communication issues with other vehicle modules
Easy Installation Guide for Your 2003-2007 GM BCM
This is a straightforward replacement that a confident DIYer can handle. The location varies slightly between trucks and vans.
- Safety First: Always disconnect the negative battery terminal and wait a few minutes before starting work.
- Locate the BCM: On Silverado and Sierra pickups, it’s typically located under the driver’s side of the dashboard, near the steering column. For Express and Savana vans, it’s usually behind the center dash trim.
- Remove Trim Panels: Carefully remove any plastic panels necessary to access the module.
- Disconnect and Remove: Unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM and remove it.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical harnesses.
- Post-Installation Procedures: Reconnect the battery. Follow the critical steps below to ensure all systems are properly synced.
IMPORTANT: Post-Installation Steps Required
After installing your new BCM, two procedures are necessary to ensure full system functionality and safety. These steps require a high-level diagnostic scan tool (not a basic code reader).
- Airbag System Reset: You must perform the ‘Setup SDM Primary Key in BCM’ procedure. This synchronizes the new BCM with the airbag system (Sensing and Diagnostic Module) and will clear the airbag warning light on your dash.
- Brake Pedal Position Sensor Relearn: Some vehicles require the Brake Pedal Position (BPP) sensor to be recalibrated. This ensures the brake lights and stability control systems function correctly with the new module.
If you are not equipped to perform these procedures, we strongly recommend seeking assistance from a qualified professional technician.
Guaranteed Fitment
This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. Please verify your part number and check the detailed fitment list to ensure this is the correct part for your vehicle. Restore your vehicle’s electrical integrity and get back on the road with confidence.