You will need to remove the red inserts on your factory 2007+ GMC truck grill emblem to install the replacement LED grill emblem letters. This can be done by drilling out the plastic pins in the inserts on the rear of the factory emblem.
After removing the OEM Letters, drill a hole for the multicolor GMC emblem wiring for each letter.
Run wires through and drill holes as needed. The LED emblem will only fit inside GMC grill emblems with chrome surroundings and recessed red inserts inside them. Each Letter features 3M adhesive backing to ensure a secure fit!
Check out this Video Example of removing your OEM Red GMC letter inserts pieces.
Actual Install Video of the GMC Multicolor Letters