74578 Light Wiring Harness 2022+ Chevy GM Suburban Tahoe Adapter Western Fisher Blizzard SnowEx

This is the new 74578 harness only, this is a new 4 realy harness It comes in kit 74579 for the new 2022 Chevy Tahoe and Suburban. This one has the new sealed relays for better performance. 

Also known as 74577.

Click here to use the Western Power Match to make sure you get the correct light harness.

Here is a link to the Western Wiring Schematics Guide. The installation instructions can be found at this link.