Restore Your Acadia’s Electrical System with a Plug-and-Play BCM

If your 2007-2012 GMC Acadia is suffering from bizarre electrical issues like flickering lights, malfunctioning power windows, or a security system that has a mind of its own, you’ve likely pinpointed the culprit: a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated problems. This replacement BCM, part number 15872421, is the definitive solution to restore order and reliability to your vehicle.

Is Your Acadia Showing These Symptoms?

A failing BCM doesn’t always trigger a check engine light. Instead, it creates a host of annoying and unpredictable electrical gremlins. Here are the common signs I’ve seen in my 20+ years of experience:

• ✔ Intermittent or non-working power windows, door locks, or mirrors.
• ✔ The security or anti-theft system light stays on, preventing the vehicle from starting.
• ✔ Interior or exterior lights flickering, staying on, or not working at all.
• ✔ The instrument cluster behaving erratically (gauges dropping to zero, warning lights flashing).
• ✔ Communication error codes stored, such as U0140, U0155, or other U-series codes.
• ✔ Problems with the HVAC (heating and air conditioning) controls.

Your Straightforward BCM Installation Guide

Installing your new 2007-2012 Acadia BCM is a manageable job for a confident DIYer. We handle the difficult part by programming the module to your vehicle’s VIN before we ship it. This means no expensive dealer programming is required.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
2. Locate the BCM: On the 2007-2012 Acadia, the BCM is typically located on the left-hand (driver’s) side of the dash, often behind the lower dash panel near the steering column.
3. Remove Trim Panels: Carefully remove any plastic trim panels necessary to access the module. These are usually held in with clips and a few screws.
4. Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs that need to be pressed. Once disconnected, unbolt the module from its mounting bracket.
5. Install the New BCM: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors, ensuring they click securely into place.
6. Post-Installation Steps: Re-install the trim panels and reconnect the negative battery terminal. Start the vehicle and check for proper function of all accessories. In some cases, a post-installation procedure like an airbag system sync or brake pedal relearn may be needed if specific warning lights appear.

Important Notes After Installation

This module arrives ready to install. However, depending on your vehicle’s specific configuration, a couple of simple relearn procedures may be necessary if you see a warning light:

• Airbag System Sync: If the airbag light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
• Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be required to ensure brake lights and stability control work correctly.

We believe in transparency: there is absolutely no core charge for this part. You can keep your old module.

Verified Vehicle Compatibility List

This Body Control Module is a direct replacement for part number 15872421 and is compatible with a wide range of GM vehicles. Please verify your model and year below. It will also interchange with the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084.