Features

GM Harness: The iDatalink Maestro HRN-RR-GM3 installation harness greatly simplifies the installation of the Maestro RR or RR2 Car Radio Replacement Interface module (sold separately) in select GM vehicles when replacing your factory radio with an iDatalink Serial Port compatible head unit from Kenwood, JVC, Alpine, Sony, or Pioneer.

• Vehicle Compatibility: Click here for a list of compatible GM vehicles.
• Radio Compatibility: Click here for a list of fully compatible aftermarket head units with an iDatalink Serial Port.

Flashing Module via Weblink Desktop: The iDatalink Maestro RR or RR2 will need to be loaded with correct firmware before installation. The included USB cable plugs into your computer and allows you to "flash" the Maestro RR or RR2 with the appropriate firmware to prepare it for installation. Simply download Weblink Desktop (for Windows and Mac) onto your computer to access the appropriate firmware. System requirements include -

• Windows PC (10/8.1/8/7/Vista/XP/2000) or Mac OS X (Mojave [10.14], HighSierra [10.13], Sierra [10.12], El-Capitan [10.11])
• Available USB port (version 2.0 or 3.0)
• 4GB RAM or more
• 200MB available space on HDD
• Internet connection

Amplifier Bypass: If your GM vehicle features a factory amplifier, the factory amp cannot be retained and must be bypassed or replaced with an aftermarket amplifier.

Retained Factory Features: When installing select Kenwood, JVC, Alpine, Sony, & Pioneer in-dash receivers which contain an iDatalink serial port, the HNR-RR-GM3 harness along with the iDatalink Maestro RR or RR2 interface module allows you to retain the following GM factory features (if applicable).

• Steering Wheel Controls
• OnStar Service & Bluetooth Hands-Free
• Backup Camera
• Turn Signals & Warning Chimes (external chime module included)
• RAP (Retained Accessory Power)
• Access & Modify Vehicle Settings

Extra Features: The following Extra features are added when replacing your aftermarket head unit with a compatible iDatalink Serial Port head unit from Kenwood, JVC, Pioneer, Sony, or Alpine (using the Maestro RR or RR2 Car Radio Replacement Interface module and HNR-RR-GM3 harness.

• User Selectable Gauges
• Vehicle Information (Tire Pressure, Battery Voltage, Engine Codes, Door Open Status)
• Park Assist (Chimes & On-Screen Display)

Connections: The iDatalink Maestro HRN-RR-GM3 vehicle harness includes two Molex connectors which plug into your GM factory radio harness. On the other end of the harness are four multi-pin connectors which plug into the Maestro RR or RR2 Car Radio Replacement Interface module. There is also a composite video RCA connector which plugs into the backup camera input on your compatible aftermarket head unit. In addition, you will need to hardwire the power/ground, illumination, speaker, and navigation output leads of the HRN-RR-GM3 harness to your aftermarket head unit's wiring harness. The external chime module will plug into the Maestro RR or RR2 interface module.