LED back lighting, needle color changes.

Cluster Needle colors

LED color chart

Bezels:

Overlays:

Common overlay upgrades 03-05 Chevy Truck

White face with Trans temp

06-07 Chevy Duramax Diesel

Common cluster problems  GM Rebuild List   Ford list    Dodge list

White or blue back lighting bulbs choice not leds

Brighter white bulbs

Blue bulb back lighting