This listing is for a good used PAC RP3-GM11 RADIO REPLACEMENT INTERFACE & HARNESS as listed in the item description, as titled and pictured. Connector is chipped as shown.

Radio Replacement Interface for GM Vehicles with Class II databus and 24-pin harness.

High current 10A accessory output

Data-controlled outputs for connection to your navigation radio; speed, reverse, and E-brake status output wires.

Retains factory-installed amplifier (standard & premium)

Data controlled RAP accessory output

Keeps vehicle data bus intact for service

Plug-in-connection for steering wheel control module (SWI-RC, SWI-RC-1, or SWI-CP2)

In package updatable using the PAC-UP

Adjustable chime volume: 4 levels, and off

Be sure before purchasing that you are familiar installing/operating these units. If you aren't knowledgeable on how to install, hire a shop to do it for you. There is plenty of online material to figure out settings, etc once your radio is installed.