Restore Your GM Truck or Van’s Electrical System

Are you chasing electrical gremlins in your 2003-2007 GM truck or van? Flickering lights, power locks with a mind of their own, or a security system that prevents your vehicle from starting are all classic signs of a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen these modules cause some of the most frustrating and difficult-to-diagnose issues. The BCM is the central nervous system for your vehicle’s body electronics, and when it fails, it can create a cascade of bizarre problems. This isn’t just an inconvenience; it can be a major reliability issue.

This replacement Body Control Module is the definitive solution. We take the guesswork and high dealership costs out of the repair. Simply provide us with your vehicle’s VIN at checkout, and we will program the module with the very latest GM-certified software specifically for your truck or van. It arrives at your door ready for installation, saving you a trip to the dealer and hundreds of dollars in programming fees. This is the most effective way to restore your vehicle’s essential functions and get back on the road with confidence.

Is Your Vehicle Showing These Symptoms?

• ✔ Power windows, mirrors, or door locks operating intermittently or not at all.
• ✔ Interior or exterior lights staying on, not turning on, or flickering randomly.
• ✔ The security or anti-theft light is flashing, causing a no-start condition.
• ✔ Gauges on the instrument cluster behaving erratically or not working.
• ✔ The horn honking unexpectedly or not working when pressed.
• ✔ Diagnostic trouble codes (DTCs) related to communication errors, often U-codes like U0140.
• ✔ Remote keyless entry (RKE) system is unresponsive.

A Straightforward Guide to Installation

1. ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work. Wait a few minutes for the system capacitors to discharge.
2. ✔ Locate the BCM: 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 panel.
3. ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
4. ✔ Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and securely plug in all the electrical connectors. You should hear a click as they lock into place.
5. ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position and test all body functions—lights, locks, windows, etc.—to ensure proper operation.
6. ✔ Perform Relearns (If Necessary): As noted below, some vehicles may require a relearn procedure for the airbag or brake systems. This is typically only needed if a warning light appears after installation.

Important Post-Installation Information

While this 2003-2007 GM BCM is a plug-and-play solution for most functions, GM’s complex systems sometimes require a handshake between modules. Be aware of the following potential procedures:

• Airbag System Sync: If the airbag warning light is illuminated after installation, it doesn’t mean the part is faulty. A ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible high-level scan tool to sync the new BCM with the airbag system.
• Brake Pedal Position (BPP) Relearn: On some models, a BPP sensor relearn may be needed to ensure correct brake light operation and to prevent issues with the traction control system.
• No Core Charge: You are not required to return your old module. There is no core charge associated with this purchase.

Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step of the process.

Guaranteed Fitment for Your GM Vehicle

This module is a direct replacement for part number 15136224 and the following interchangeable part numbers: 15167329, 15194169, 15747545, 15116065, 15198115, 15136876, and 10367689. It is confirmed to fit the following vehicles:

Frequently Asked Questions