Upgrade your Buick Grand National with ease using this Plug-and-Play Installation Harness, designed specifically for use with DD-EFI Digital Dash systems. It allows seamless integration using the vehicle’s factory wiring, making installation clean and straightforward.

Key Features

• Plug-and-play design eliminates wiring guesswork

• Compatible only with DD-EFI Digital Dash systems

• Engineered for Grand National platforms

• Streamlined connections ensure a professional-grade install

Compatibility

• Main Connector Types (Verify Before Ordering):

  • V2/V3 8-Pin Connector

  • V1 12-Pin Connector

Note: This harness is only compatible with DD-EFI Dash units and is designed to connect directly to factory Grand National wiring harnesses.

Installation Instructions

1. Disconnect the vehicle battery

2. Remove the factory instrument cluster

3. Connect the DD-EFI harness to factory connectors

4. Attach the other end to the DD-EFI Digital Dash

5. Reconnect the batter