📋 Disclosure: As an Amazon Associate, ModifiedLife earns from qualifying purchases. This helps keep our guides free — at no extra cost to you.
2nd Gen Platform: GM C1XX Platform (GMTC1XX) | Model Years: 2018–2023
This page provides the complete 2018–2023 Chevrolet Traverse radio wiring diagram for the 2nd generation Traverse (GM C1XX platform). Use this guide when replacing the factory head unit or troubleshooting audio in a 2018–2023 Chevrolet Traverse.
The 2nd generation Traverse was unveiled in January 2017 and went on sale in mid-2017 as a 2018 model, riding on the long-wheelbase version of GM’s C1 platform shared most closely with the Buick Enclave. It adopted a more truck-like design inspired by the Tahoe while shedding some weight compared to the outgoing generation. Power came from a 3.6L V6 across most trims, with the sporty RS trim offering a turbocharged 2.0L four-cylinder engine, all paired with a nine-speed automatic transmission. This generation introduced a 7-inch touchscreen infotainment system with standard Apple CarPlay and Android Auto, along with GM’s OnStar 4G LTE Wi-Fi hotspot, across the trim range. The Traverse received a mid-cycle refresh for the 2022 model year with updated styling and expanded safety features. Wiring information for this generation is actively being compiled by the community.
🔗 In This Guide
2018–2023 Chevrolet Traverse Stereo Wiring Diagram
Use the wiring table below for your 2018–2023 Chevrolet Traverse stereo wire color codes, speaker wiring, and harness pinout.
| Wire Function | Wire Color & Location |
|---|---|
| Battery Constant Power Wire (12V+) | Red/Yellow |
| Accessory Switched Power Wire (12V+) | Run a Power Wire to the Ignition Switch Harness for Switched Power |
| Ground Wire | Black |
| Illumination Wire | N/A |
| Dimmer Wire | N/A |
| Antenna Trigger Wire | N/A |
| Amplifier Trigger Wire | N/A |
| Factory Amplifier Location | N/A |
| Rear View Camera Video Positive (+) | N/A |
| Rear View Camera Video Negative (–) | N/A |
| Center Speaker Positive Wire (+) | Yellow/White |
| Center Speaker Negative Wire (–) | Blue/Yellow |
| Front Left Tweeter Positive (+) | Blue |
| Front Left Tweeter Negative (–) | Brown/Blue |
| Front Right Tweeter Positive (+) | Yellow |
| Front Right Tweeter Negative (–) | Yellow/Black |
| Front Left Speaker Positive (+) | Blue |
| Front Left Speaker Negative (–) | Brown |
| Front Right Speaker Positive (+) | Yellow |
| Front Right Speaker Negative (–) | Yellow/Black |
| Rear Left Tweeter Positive (+) | N/A |
| Rear Left Tweeter Negative (–) | N/A |
| Rear Right Tweeter Positive (+) | N/A |
| Rear Right Tweeter Negative (–) | N/A |
| Rear Left Speaker Positive (+) | Green |
| Rear Left Speaker Negative (–) | Green/Black |
| Rear Right Speaker Positive (+) | White |
| Rear Right Speaker Negative (–) | Blue/Black |
| Subwoofer Positive Wire (+) | Blue/Gray |
| Subwoofer Negative Wire (–) | Gray/Black |
2018–2023 Chevrolet Traverse Speaker Sizes and Locations
Use the speaker table below for your 2018–2023 Chevrolet Traverse speaker sizes and locations.
| Speakers | Speaker Size & Location |
|---|---|
| Center Speaker Size | 3 1/2″ Speakers |
| Center Speaker Location | Center of the Dash (Bose Audio) |
| Front Tweeter Speaker Size | 2 3/4″ Speakers |
| Front Tweeter Speaker Location | Dash Corners |
| Front Speaker Size | 6″ x 9″ Speakers |
| Front Speaker Location | Front Doors |
| Rear Tweeter Speaker Size | 3 1/2″ Speakers |
| Rear Tweeter Speaker Location | 3rd Row Side Panels (Bose Audio) |
| Rear Speaker Size | 6 1/2″ Speakers |
| Rear Speaker Location | Rear Doors |
| Subwoofer Speaker Size | N/A |
| Subwoofer Speaker Location | N/A |
Frequently Asked Questions
Why can’t I just splice into the speaker wires on a Bose-equipped 2018–2023 Traverse?
On Bose-equipped 2nd generation Traverse models, the factory Amplifier is a participant on GM’s Ethernet-based infotainment network rather than a simple analog amplifier. Per GM service documentation referenced in car audio installer forums, the radio sends audio digitally over Ethernet to the amplifier, and the Amplifier only outputs standard analog speaker-level signal after that point. This means a basic wire tap often isn’t enough for a clean aftermarket install — most installers use a dedicated loopback or T-harness designed for this Ethernet-amplifier setup, or a purpose-built processor, rather than cutting into the factory speaker wiring directly.
Does the 2018–2023 Chevrolet Traverse have Apple CarPlay and Android Auto?
Yes. The 2nd generation Traverse introduced standard Apple CarPlay and Android Auto across the trim lineup with its redesigned 7-inch touchscreen infotainment system, a significant upgrade from the 1st generation, which didn’t offer smartphone mirroring. The system also includes standard OnStar with a 4G LTE Wi-Fi hotspot.
How many speakers does the Bose premium audio system have in a 2018–2023 Traverse?
The optional Bose premium audio system on the 2nd generation Traverse uses a 10-speaker configuration, based on Chevrolet’s own marketing descriptions of the system for this generation. Base and mid-level trims use a smaller standard speaker count without the dedicated Bose Amplifier.
Do I need to bypass Active Noise Cancellation (ANC) before adding a subwoofer to a 2018–2023 Traverse?
If your Traverse’s Bose system includes Active Noise Cancellation microphones, yes — installers commonly recommend a dedicated ANC bypass harness before wiring in an Aftermarket Subwoofer or amplifier. Without disabling the ANC microphones, the factory system can feed back into aftermarket Amplifiers and potentially damage equipment, according to guidance from car audio harness manufacturers who build ANC bypass products specifically for this generation of GM vehicle.
What wiring harness adapter fits a 2018–2023 Chevrolet Traverse?
Aftermarket installation harness manufacturers offer T-harnesses specific to 2018–2024-era Chevrolet/GMC/Cadillac vehicles, with separate part numbers depending on whether your Traverse has the amplified Bose system or the non-amplified standard system, and depending on connector color (black/gray vs. aqua/tan) at the factory Amplifier or radio. Always confirm your Traverse’s specific audio system and connector type with the harness supplier before ordering, since using the wrong harness on an amplified system can cause distortion or damage.
Add Wiring Information
If you have verified 2018–2023 Chevrolet Traverse radio wiring data — wire colors, pin locations, harness adapter tips, or speaker sizes — please share it in the comments below. Community-submitted data is reviewed and added to the table above to help other 2nd generation Traverse owners. If you have a question about your 2nd gen Chevrolet Traverse stereo installation, post it below and our community will work to find an answer.
📻 Jump to Another Generation