Review on 📡 GM Genuine Parts 84346807 Antenna with High Frequency Capability by John Clarey

For reference, my truck has worked fine without this antenna. However, the factory navigation and compass did not work. The navigation showed me in the middle of a field in a different state. I finally tracked down the likely culprit (that antenna) and replaced it. Immediately my GPS and compass worked again! Frame. Typically this is not a difficult or even moderately difficult installation/replacement. You only have to remove a few parts to access the antenna mounting nut.