Programmed 2002-2005 GM BCM 15065293 | Trailblazer, Envoy, Rainier

Tired of Bizarre Electrical Problems in Your GM SUV?

As a technician with over two decades of experience, I’ve seen it all. A customer comes in with a Trailblazer or Envoy acting possessed—the radio turns on by itself, the power windows have a mind of their own, the dash lights flicker randomly, or worse, the vehicle won’t start at all. These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it starts to go, it creates chaos. This isn’t a part you can just ignore.

We offer a straightforward, reliable solution: a replacement Body Control Module, part number 15065293, that arrives at your door pre-programmed for your specific vehicle. Simply provide your VIN at checkout, and we handle the complex part. We flash the module with the latest GM software, ensuring it communicates perfectly with your SUV’s other systems right out of the box. This eliminates the need for an expensive trip to the dealership for programming, saving you time and hundreds of dollars.

Is Your SUV Showing These BCM Failure Symptoms?

A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need. Look out for communication-related Diagnostic Trouble Codes (DTCs) like U0140, U0155, or U0164.

• ✔ Erratic or non-functional power windows, door locks, and interior lights.
• ✔ The security light stays on, preventing the engine from starting.
• ✔ Gauges on the instrument cluster stop working or behave erratically.
• ✔ The radio or climate control system functions intermittently or not at all.
• ✔ Unexplained battery drain that leaves you with a dead battery overnight.
• ✔ The horn honking unexpectedly.
• ✔ Inconsistent operation of the windshield wipers.

Your Straightforward BCM Installation Guide

Replacing the BCM on these GM SUVs is a job most DIYers can handle with basic tools. The module is typically located behind the rear seat on the driver’s side, integrated with the fuse panel.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
2. Access the Module: Locate the rear fuse block. You may need to fold down the rear seat and remove a plastic cover to gain access.
3. Disconnect Connectors: Carefully unplug all the electrical connectors from the BCM. Most have a locking tab that needs to be depressed or lifted. Don’t force them.
4. Remove the Old BCM: Unbolt or unclip the old BCM/fuse block assembly from its mounting location.
5. Install the New BCM: Mount your new, pre-programmed BCM in the same position and reconnect all electrical connectors securely.
6. Reconnect Battery: Reattach the negative battery terminal.
7. Perform Final Checks: Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, radio, etc.—to confirm the repair. Note the post-installation procedures below.

Important Post-Installation Steps

While our programming handles the critical setup, some vehicles may require additional synchronization steps after installation. Please be aware of the following:

• Airbag System Sync: If your airbag warning light illuminates after installation, a simple procedure called ‘Setup SDM Primary Key in BCM’ is needed. This requires a professional-grade scan tool to sync the BCM with the airbag module.
• Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be necessary to ensure correct brake light and traction control operation. This can also be performed with a capable scan tool.

Always consult a factory service manual or a qualified technician if you are unsure about any step.

Verified Vehicle Compatibility List

This BCM is a direct-fit replacement for the following vehicles, matching part numbers 15122670, 15065293, 15114669, 15191621, and 9352135. Please verify your vehicle and options below to ensure proper fitment.