iDatalink Maestro HRN-RR-GM3 Legacy Radio Replacement T-Harness

Legacy model: This page identifies the original HRN-RR-GM3 harness, UPC 627780000671. For the current-generation harness, see HRN-HRR-GM3 and verify the exact vehicle and radio application before ordering. The two part numbers have different product identifiers; this page does not promise an automatic substitution.

The iDatalink Maestro HRN-RR-GM3 is a vehicle-specific radio replacement harness for select GM vehicles. It works as part of a compatible Maestro installation, not as a stand-alone interface.

At a Glance

• Original HRN-RR-GM3 model, distinct from the newer HRN-HRR-GM3.
• Designed for supported vehicle-specific Maestro radio replacement installations.
• Requires a compatible Maestro interface, aftermarket radio and vehicle-specific installation instructions.
• Retained factory functions depend on the vehicle, original equipment, radio and programmed interface.

Compatibility & Installation

Use the installation guide for this exact legacy harness part number. Confirm the vehicle year, model, factory sound system and aftermarket radio before installation. Do not apply the newer HRN-HRR-GM3 wiring instructions solely because the application family is similar. The Maestro interface must be programmed for the supported vehicle and radio.

What’s Included

• HRN-RR-GM3 radio replacement harness; original GM3 package includes a chime speaker.
• Maestro interface and aftermarket radio are sold separately.

Specifications

Related Installation Parts

• HRN-HRR-GM3 — current-generation harness; confirm application compatibility
• ADS-MRR — Maestro RR interface

Need help choosing the correct generation? Contact MCOR with your vehicle details, original audio equipment and radio model before ordering.