2015-2016 Chevrolet Trax Audio Module: Decoding VIN Lock, Black Screens, and Recalls

Symptoms of a Failing Audio Control Module

When the audio module in a 2015-2016 Trax begins to fail, it can cause a range of frustrating issues. Before assuming the module is broken, it's worth checking the simple fixes first.

1. Black or Unresponsive Screen

The most common symptom is a completely black screen. The radio may still play audio, and steering wheel controls might work, but the display is dead. In other cases, the screen may turn on but will not respond to touch, making it impossible to access menus. This can be caused by a software glitch, an internal hardware failure, or even extreme temperatures.

2. No Audio and/or Missing Chimes

Another frequent failure is a total loss of sound from the speakers. This often happens along with the loss of all vehicle chimes, such as the turn signal click, seatbelt reminder, and key-in-ignition warning. This is a significant safety issue and was the subject of a recall. The problem can sometimes be traced to a blown amplifier fuse or an internal failure of the module itself.

3. "Ghost Touch" or Phantom Inputs

Some owners report the system acting on its own. The radio might change stations randomly, adjust settings, or even try to make calls through a connected phone without any user input. This is often caused by a failing digitizer, the part of the screen that registers touch.

4. Intermittent Operation or Freezing

The module may work correctly one moment and fail the next. It might freeze, reboot randomly, or go completely black while driving, only to start working again on the next trip. This intermittent behavior can be a sign of a failing internal component or a poor electrical connection. Weakness in the vehicle's battery or alternator can also cause these types of electrical issues.

5. Battery Drain

A faulty audio module can sometimes fail to shut down completely when the car is turned off. This creates a parasitic draw that can drain the battery, leading to a no-start condition if the vehicle sits for a period of time.

Known Issues, Recalls, and TSBs

NHTSA Recall 16V257000 (GM Recall 15504)

A significant safety recall was issued for 2015-2016 Trax models equipped with the "Bring Your Own Media" radio. The radio software could lock up, causing the display to go blank and silencing all audio, including the federally mandated warning chimes for unfastened seatbelts and the key left in the ignition. This increases the risk of injury in a crash or vehicle theft. The fix for this recall is a simple software update performed by a Chevrolet dealership at no cost.

Buying a Used Audio Control Module

Purchasing a used audio module can save you hundreds of dollars, but it comes with a critical warning. You cannot simply swap a used module from another vehicle and expect it to work.

Compatibility Check: Match Part Numbers and RPO Codes

To ensure compatibility, you must match the part number exactly. Furthermore, you must verify that the donor vehicle had the same options as yours. Specifically, look for these Regular Production Option (RPO) codes on the silver sticker in the glove box:

• UF7: Required for MyLink system functionality.
• U2K: Required for satellite radio (SiriusXM) functionality.

Using a module from a vehicle without these options may result in lost features. The RPO code sticker is typically found inside the glove compartment.

Unlocked vs. Locked Modules

When shopping for a used part, you will find two types:

• Standard (Locked): Most used modules are locked. They are cheaper upfront but will require a trip to a dealer or a specialist for programming, which adds to the total cost.
• Pre-Unlocked (Plug-and-Play): Some sellers offer modules that have been professionally unlocked and cleared of their original VIN. These are more expensive but are designed to be plug-and-play. When installed, they automatically learn your vehicle's VIN without needing a dealer visit. For most DIY installers, this is the recommended option.

Programming and Installation

The physical installation of the module is straightforward for a DIYer with basic tools, typically only requiring the removal of dash trim and a few 7mm screws. The challenge lies entirely in the software programming.

Who Can Program the Module?

If you buy a standard, locked used module, you have a few options for programming:

1. Chevrolet Dealership: Any dealer can perform the VIN relearn procedure using their factory diagnostic tools. This is the most common but often most expensive option, with programming costs typically ranging from $150 to $250.
2. Independent Repair Shop: A well-equipped independent shop that has a GM MDI or Tech2 scan tool and a subscription to GM's Service Programming System (SPS) can also program the module.
3. Mail-In Unlocking Service: Several companies offer services where you can mail in your used module to have it unlocked and programmed to your VIN, after which they ship it back to you ready for installation.

Cost Comparison

Prices can vary based on condition and supplier, but here is a general estimate of what to expect:

Frequently Asked Questions (FAQ)