Restore Your GM Truck’s Electrical Functions and Reliability
If you’re dealing with bizarre electrical problems in your 2003-2007 GM truck or van—like power windows that won’t budge, door locks with a mind of their own, or dashboard lights flickering randomly—a failing Body Control Module (BCM) is the most likely culprit. As the central hub for your vehicle’s body electronics, a faulty BCM can turn your reliable workhorse into a source of daily frustration. This isn’t just an inconvenience; it can affect vehicle security and safety systems. Don’t let electrical gremlins win. We offer a dependable, direct-fit solution with this Programmed GM BCM, designed to get your vehicle back to factory-spec performance without the dealership price tag.
Over my 20 years in the shop, I’ve seen hundreds of these GMT800 and GMT900 platform vehicles come in with these exact issues. The cause often traces back to a BCM compromised by moisture intrusion or internal circuit board failure. The key to a lasting repair isn’t just swapping the part—it’s ensuring the replacement is correctly configured for your vehicle’s specific options. That’s why we take the guesswork out of the equation. Simply provide your vehicle’s VIN at 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 installation, saving you a trip to the dealer and hundreds in programming fees.
Case Study: The 2005 Sierra with a Mind of Its Own
A customer brought in his ’05 Sierra 2500, completely fed up. The radio would turn on and off, the dome light wouldn’t work, and the power locks were unresponsive. He’d already replaced the battery and checked all the fuses. A quick scan with a professional tool revealed a U0140 code—Lost Communication With Body Control Module. After verifying power and ground at the BCM connectors, we confirmed the module itself was internally faulted. Instead of a costly dealer replacement, we installed a VIN-programmed unit just like this one. The entire job, including the brake pedal position relearn, took less than an hour. The customer drove away with all his truck’s features working perfectly, saving significant time and money.
Is Your GM Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution.
- ✔ Power windows, mirrors, or door locks operating intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system acting erratically or preventing the vehicle from starting.
- ✔ The radio or climate control system malfunctioning.
- ✔ Dashboard warning lights (like the airbag light) illuminating for no reason.
- ✔ Diagnostic Trouble Codes (DTCs) such as U0140, B1001, or other ‘U’ (network) and ‘B’ (body) codes are present.
A Straightforward Guide to BCM Installation
For the confident DIYer or professional technician, replacing the BCM is a manageable job. This Programmed GM BCM makes it even simpler.
- Safety First: Always disconnect the negative battery terminal and wait a few minutes before starting any electrical work.
- Locate the BCM: On most Silverado and Sierra pickups, it’s located under the driver’s side of the dashboard, near the steering column. For Express and Savana vans, it’s typically behind the center dash panel.
- Remove Connectors: Carefully unplug the multiple wiring harness connectors from the old BCM. They have locking tabs that need to be depressed. Take a photo beforehand if it helps you remember their positions.
- Swap the Module: Unbolt or unclip the old BCM from its mounting bracket and install the new module in its place.
- Reconnect Everything: Plug all the wiring harnesses back into the new BCM. Ensure each connector clicks securely into place. Reconnect the negative battery terminal.
- Perform Relearns: Start the vehicle. As noted in our post-installation guide, you may need a diagnostic tool to perform a ‘Setup SDM Primary Key in BCM’ procedure if the airbag light is on, or a ‘Brake Pedal Position Relearn’.
Verified Vehicle Compatibility for Part 15116065
This module is a direct replacement for several part numbers, including 15167329, 15194169, 15747545, 15136224, 15198115, 15136876, and 10367689. It is guaranteed to fit the following models and options:
CHEVROLET EXPRESS/GMC SAVANA VANS 1500/2500/3500 2003-2007 (Varies by options, see full list)
CHEVROLET SILVERADO/GMC SIERRA PICKUPS 1500/2500/3500 2003-2007 (Classic Style, primarily non-Crew Cab models, varies by transmission/options)
Please review the detailed fitment list at the top of the page to confirm compatibility with your exact year, model, and cab configuration.