2003 GMC Sierra 3500 Antenna Extension Cables
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American International® - Antenna Extension Cable$8.73 - $12.28 -
Metra® - Antenna Extension Cable with Capacitor$25.64 - $33.70 + Free Shipping with iD FastTrack -
Wilson Electronics® - Co-Phase Cable$40.96 + Save an extra $2.00 with iD FastTrack