Fix Your Van’s Electrical Issues: The Pre-Programmed BCM Solution

If you’re a contractor or fleet owner, you know that a 2004-2007 Chevrolet Express 3500 VAN with electrical problems isn’t just an annoyance—it’s a vehicle that can’t do its job. After 20+ years in the bay, I’ve seen countless work vans sidelined by what seems like a poltergeist: flickering lights, a dead radio, power windows with a mind of their own, or an HVAC system that only blows hot air. More often than not, the culprit is a failing Body Control Module (BCM). This isn’t just a part; it’s the central command for your van’s body electronics, and when it goes, it takes convenience and safety features with it.

This GM 15116066 BCM is the definitive, hassle-free solution. We take the biggest headache out of the repair—the programming. Each module is expertly programmed to your vehicle’s specific VIN before it ships. This means no expensive trips to the dealership, no waiting for them to fit you in, and no special GM diagnostic tools required for the basic installation. You get a part that’s ready to install right out of the box, restoring full functionality and getting your workhorse back on the road where it belongs.

Is Your GM Vehicle Showing These BCM Failure Signs?

A failing BCM can manifest in numerous ways. If your truck or van is experiencing any of these, it’s a strong indicator that your Body Control Module needs attention. This isn’t just for a 2004-2007 Express 3500 VAN BCM; these symptoms apply across the compatible GM lineup.

• ✔ Non-responsive or erratic power windows, door locks, or mirrors.
• ✔ Interior or exterior lights that stay on, flicker, or won’t work at all.
• ✔ HVAC controls are inoperative, or the blower motor runs intermittently or not at all.
• ✔ The vehicle’s security system malfunctions, causing no-start or alarm issues.
• ✔ An active airbag warning light, often with a Diagnostic Trouble Code (DTC) like B1001 (Option Configuration Error).
• ✔ Intermittent dashboard warning lights without a clear cause.
• ✔ Communication loss codes with other modules on the vehicle network.

Your Quick-Start Installation Guide

One of the best features of this module is its straightforward installation. For most models, it’s a simple swap that a DIYer or any professional technician can complete in minutes.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and allow the system to reset.
2. Locate the BCM: On a 2004-2007 Express or Savana Van, the BCM is typically found in the center of the dashboard. On trucks and SUVs like the Silverado or Tahoe, it’s usually under the driver’s side dash, near the steering column.
3. Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs, so be gentle. Remove any mounting bolts or clips holding the old module in place, then install the new module and reconnect the harnesses securely.
4. Reconnect & Test: Reconnect the battery terminal. Start the vehicle and test all body functions: lights, locks, windows, wipers, and HVAC system to confirm the repair.
5. Post-Install Checks: In some cases, an airbag light may persist. This requires an ‘SDM Key Setup’ with a professional scan tool. A brake pedal position relearn might also be needed. This is normal and ensures all systems are properly synced.

Verified Compatibility for Your GM Truck or Van

This module, part number 15116066, is a direct replacement for a wide range of popular General Motors vehicles. It also interchanges with part numbers 10383536, 15136225, 15137393, 15198116, and others. Please verify your vehicle is on the list below for guaranteed fitment.