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Easy Ford Super Duty 4″ to 8″ Sync 3 Upgrade Wiring Harness

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NaviUpgrade’s Ford F250/F350 Super Duty Sync 3 Upgrade Harness is designed to make upgrading your base model F350 Super Duty to have Sync 3 an absolute breeze. Plug & Play, your install can be finished in as little as 45 minutes!


1 × 4" to 8" Sync to Sync 2/3 Base Upgrade Harness

In stock (can be backordered)

1 × CGEA Pigtail

In stock (can be backordered)

In stock (can be backordered)

The NaviUpgrade 2017-2019 Ford Super Duty 4″ to Sync 3 Upgrade harness is perfect for the DIY-er who is looking to add Sync 3 to his or her truck!

We also offer FREE programming files with your purchase, something no other online store does. This allows you to get up and running quickly using an OBDII dongle, without messing around with a bunch of settings or hex codes in FORScan.

Please feel free to check out our Guides tab for more information on what other hardware you’ll need to complete your upgrade.

We pride ourselves in providing the most value out of any online store when it comes to Sync 3 Upgrades. NaviUpgrade is constantly working on building out resources for our customers and fans to use on their own vehicles. Our goal is to empower all vehicle owners to feel comfortable upgrading their own vehicles.


Weight9 oz
Works on

This harness will work for a 4" to 8" Sync 3 Upgrade for any 2017-2019 Ford F350 Super Duty, both in the United States and abroad.

Does NOT work on

This harness will not work on vehicles other than a 2017-2019 Ford F/250/F350 Super Duty.

Model Year



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