2013-2018 Chevrolet Trax Bose Amplifier: Solving the 'No Sound' Problem and Programming

Symptoms of a Failing 2013-2018 Trax Audio Amplifier

When the Bose amplifier in a Chevrolet Trax begins to fail, the symptoms are often sudden and clear. Because the amplifier processes the sound for all speakers, a complete failure will silence the entire system.

• Complete Loss of Sound: This is the most common symptom. The radio or infotainment screen will turn on and appear to function normally—you can change stations or sources—but no sound comes from any of the speakers.
• No Chimes or Turn Signal Clicks: In many GM vehicles, the amplifier is also responsible for generating safety chimes, warnings, and the audible click of the turn signals. If these sounds are also gone, it's a strong indicator that the amplifier is the culprit.
• Popping, Crackling, or Distorted Audio: Before a complete failure, the amplifier may produce loud popping sounds when the vehicle is turned on or off. You might also hear persistent static, crackling, or heavily distorted music from all speakers.
• Sound Cutting In and Out: The audio may work intermittently, cutting out randomly or after hitting a bump. This can indicate a loose connection or failing internal components.
• Diagnostic Trouble Code U0186: A professional scan tool will often reveal the code U0186 - Lost Communication With Audio Amplifier "A" stored in other modules like the radio or Body Control Module (BCM). This means the amplifier has stopped communicating on the vehicle's data network, effectively taking it offline.

Known Issues, TSBs, and Recalls

As of mid-2026, there are no active recalls issued by the National Highway Traffic Safety Administration (NHTSA) for the audio amplifier in the 2013-2018 Chevrolet Trax. While the vehicle has been subject to recalls for other issues, such as front lower control arms, the audio system has not been part of a safety campaign.

Some owners have reported issues with individual door speakers failing, sometimes leading to a GM service bulletin for speaker replacement on newer models. However, if all speakers stop working at once, the amplifier is the primary suspect, not the speakers themselves.

Programming: The Most Critical Step

You cannot simply swap a used or new amplifier into your Trax and expect it to work. The replacement module must be programmed to your vehicle's unique Vehicle Identification Number (VIN).

• Why is programming required? GM implements an anti-theft and component protection system. The amplifier is VIN-locked to the original vehicle it was installed in. When installed in a new vehicle, it will not function until it is programmed to recognize the new VIN. This process ensures all features configured for your specific vehicle work correctly.
• Who can program the amplifier? A Chevrolet dealership is the most common option. They have direct access to GM's Service Programming System (SPS2). Many well-equipped independent repair shops that specialize in automotive electronics can also perform this programming using a J2534 pass-thru device and a subscription to GM's technical data service. This is not a task for a typical DIY mechanic.
• What happens if you don't program it? The amplifier will not produce sound. It will remain in a locked or inactive state.

Buying a Used 2013-2018 Trax Amplifier: What to Know

Purchasing a used OEM amplifier is a cost-effective way to fix your audio system, but you must be careful to get the right part and understand the total cost.

1. Match the Part Number Exactly: While several part numbers may work, it's safest to match your original part number. The most recent part number is 95333752, which supersedes older numbers like 95272021 and 95159815. The part number 42771669 is also associated with this family.
2. Confirm It's from a Bose (UQA) Vehicle: The amplifier is useless without the rest of the Bose system. Verify with the seller that the donor vehicle had the UQA option code.
3. Inspect for Damage: The amplifier is located under the cargo floor on the passenger's side. While somewhat protected, check the used unit for any signs of water intrusion, corrosion on the connectors, or physical damage to the casing.
4. Factor in Programming Costs: Remember that the price of the used part is not your final cost. You must add the cost of having it professionally programmed, which can be significant.

Amplifier Location & Replacement

The Bose amplifier is located in the cargo area. To access it, you need to lift the rear cargo floor panel. The amplifier is situated under the foam storage trays on the passenger's side. Replacement involves removing the trays (often held by Torx screws), disconnecting the electrical connectors from the old amplifier, unbolting it, and installing the new one in its place. The physical swap is straightforward and can be done by a DIYer in under an hour.

Cost to Replace the Amplifier

Here is an estimated cost breakdown for replacing the 2013-2018 Trax Bose amplifier. Prices can vary based on your location and the specific repair shop.

Frequently Asked Questions (FAQ)