Review on ACDelco 23345325 Original Equipment Frequency by Herthoel Yanda

The XM radio in the existing antenna was very weak. Cut your driving time in half, even on open terrain. After installing this antenna base, it picks up in places where my other car usually shuts off. This antenna also works well for XM, FM, AM and GPS signals for navigation. My only hesitation was that they weren't listed in the description either here or on the Chevy website.