Axxess
Axxess LOC-GMH3 Active LOC T-Harness for Chevrolet and GMC 2019-2023 RPO IOS/IOT/IOU
Axxess LOC-GMH3 Active LOC T-Harness for Chevrolet and GMC 2019-2023 RPO IOS/IOT/IOU
Couldn't load pickup availability
Buy with the right details confirmed
Confirm the size, power, connections, and included or separately required parts described on this page.
- Authorized retailer New, authentic product from MCOR Automotive.
- Fast U.S. shipping Review shipping details
- Expert help since 2004 Ask MCOR before you order
- Clear return terms Review the return policy
Axxess LOC-GMH3 is a vehicle-specific Active LOC T-harness for adding a subwoofer amplifier or full aftermarket amplifier system to compatible non-amplified factory radios. The harness provides convenient access to speaker-level audio signal while keeping the factory radio connected and helping reduce cutting or splicing during installation.
At a Glance
- 8-pin LOC T-harness for non-amplified factory systems
- Designed for adding a standalone subwoofer amplifier or complete aftermarket audio system
- Provides 12V power lead with in-line 10A fuse, ground, and remote turn-on wire with butt connector
- 4-channel speaker-level outputs
- Input and output quick-connect harness for easier installation
- Works with Axxess line output converters
- Step-by-step instruction manual included
Exact Vehicle Compatibility
Find your vehicle below, then match the model year and factory-equipment details in the same row. Factory radio, amplifier, navigation, trim, speaker location, and connector differences can change which installation parts are required. If anything differs, contact MCOR before ordering.
| Make | Model | Years | Factory Equipment / Qualifier |
|---|---|---|---|
| Chevy | Blazer | 2020-2023 | IOS / IOT / IOU / IOK |
| Chevy | Camaro | 2019-2023 | IOS / IOT / IOU / IOK |
| Chevy | Colorado | 2019-2022 | IOS / IOT / IOU / IOK |
| Chevy | Cruze | 2019-2021 | IOS / IOT / IOU / IOK |
| Chevy | Equinox | 2019-2022 | IOS / IOT / IOU / IOK |
| Chevy | Malibu | 2019-2022 | IOS / IOT / IOU / IOK |
| Chevy | SILVERADO | 2019-2022 | IOS / IOT / IOU / IOK |
| Chevy | Silverado HD | 2020-2022 | IOS / IOT / IOU / IOK |
| Chevy | Sonic | 2019-2020 | IOS / IOT / IOU / IOK |
| Chevy | Spark | 2019-2022 | IOS / IOT / IOU / IOK |
| Chevy | Suburban | 2021-2022 | IOS / IOT / IOU / IOK |
| Chevy | Tahoe | 2021-2022 | IOS / IOT / IOU / IOK |
| Chevy | Traverse | 2020-2022 | IOS / IOT / IOU / IOK |
| GMC | ACADIA | 2020-2022 | IOS / IOT / IOU / IOK |
| GMC | CANYON | 2019-2022 | IOS / IOT / IOU / IOK |
| GMC | SIERRA | 2019-2022 | IOS / IOT / IOU / IOK |
| GMC | SIERRA HD | 2020-2022 | IOS / IOT / IOU / IOK |
| GMC | TERRAIN | 2019-2022 | IOS / IOT / IOU / IOK |
| GMC | YUKON/XL | 2021-2022 | IOS / IOT / IOU / IOK |
Fitment note: Year and model alone are not always enough to confirm compatibility. Match every factory-equipment qualifier shown for your vehicle, and contact MCOR Automotive if the radio, amplifier, navigation, speaker, camera, trim, or connector details are uncertain.
Installation Notes
- Designed to connect at the factory radio harness location
- Provides speaker-level output signal for compatible LOCs, signal processors, powered subwoofers, or amplifiers with high-level inputs
- Can support standalone subwoofer amplifier additions or complete 4-channel amplifier integrations when the system design matches the harness application
- Professional installation is recommended for signal routing, amplifier wiring, gain setup, and system tuning
- Check the latest Metra / Axxess instructions before installation
What’s in the Box
- Axxess LOC-GMH3 Active LOC T-harness
- Instruction manual
Technical Specifications
- Brand: Axxess
- Model: LOC-GMH3
- Product Type: Vehicle-specific Active LOC T-harness
- Application: select Chevrolet and GMC 2019-2023 non-amplified vehicles with RPO IOS, IOT or IOU
- Audio System: Non-amplified factory systems
- Speaker Outputs: 4-channel speaker-level outputs
- Power Lead: 12V with in-line 10A fuse
- Turn-On Lead: Remote turn-on wire with butt connector
- Sold As: Each
Identifiers & Packaging
- MPN: LOC-GMH3
- UPC: 086429432745
- Sold As: Each
- Included Components: Axxess LOC-GMH3 Active LOC T-harness, Instruction manual
Why Buy From MCOR Automotive
- Authorized retailer for the brands we sell
- Specialists in vehicle audio integration, radio replacement parts, and installation accessories
- 22+ years of professional automotive electronics experience
- Expert support for compatibility verification and proper setup
Share
