iDatalink Maestro HRN-HRR-GM4 Plug and Play T-Harness for Select GM Vehicles

iDatalink Maestro HRN-HRR-GM4 Plug and Play T-Harness for Select GM Vehicles

Looking to upgrade your GM vehicle’s audio system without a wiring headache? The iDatalink Maestro HRN-HRR-GM4 is your plug-and-play hero. Designed for select GM vehicles from 2016 and up, this T-Harness works seamlessly with the Maestro RR or RR2 modules—no cutting, no mess, just pure simplicity.

What Makes the iDatalink Maestro HRN-HRR-GM4 So Handy?

Think of this harness as the translator between your new aftermarket receiver and your vehicle’s brain. It lets your new radio talk to your GM’s internal systems, without losing the factory perks you love.

This isn’t just a wiring shortcut—it’s the VIP pass to a clean, modern install that keeps your ride’s tech intact.

Keep Your Favorite Features Intact

Swapping out your factory radio doesn’t mean you have to give up convenience. With the iDatalink Maestro HRN-HRR-GM4, you still get to keep the good stuff:

• Steering wheel audio controls stay fully functional—no awkward reach for volume.
• OnStar and Bluetooth hands-free calling? Still there, still working.
• Your engine performance data shows up right on the touchscreen—kind of like having a mini dashboard race display.

It’s like upgrading your sound system without downgrading everything else.

What's Included in the Box?

This harness comes ready to roll with everything you need for a smooth install:

• A 15" vehicle harness specifically built for the iDatalink Maestro system
• An external chime module with a 38" attached harness—because nobody likes losing those factory alerts
• A 48" OBDII harness to make sure your new system is connected to your car’s brain
• A simple 3" jumper harness to tie it all together

Basically, it's plug, play, and enjoy.

Works with Major Aftermarket Head Units

Already got your eye on a new stereo from one of the big brands? No problem. This harness is compatible with optional head unit adapters for most major radio brands. That means less time fussing with adapters and more time enjoying crystal-clear sound.

Just make sure to check the vehicle fit guide to confirm your GM model is covered and see exactly what features will work with your setup.

When you’re ready to level up your ride’s audio game without losing all the factory features that make driving easy and enjoyable, the iDatalink Maestro HRN-HRR-GM4 is the way to go. It’s clean, easy, and designed with your car—and your sanity—in mind.

FAQs

1. Does this harness work with both Maestro RR and RR2 modules? Yes, it’s fully compatible with either the Maestro RR or RR2 module, depending on what your setup calls for.
2. Will I still be able to use OnStar after upgrading my radio? Absolutely—this harness is designed to retain OnStar functionality.
3. Can I still use my steering wheel controls with this harness? Yes, your steering wheel audio controls will continue to work like they always have.
4. Does it support Bluetooth hands-free features from the factory system? Yep, Bluetooth hands-free operation is retained, so you can keep taking calls without distractions.
5. Is my vehicle compatible with this harness? You’ll need to check the vehicle fit guide to confirm compatibility and feature coverage for your specific GM model.