2004 GMC Sierra Antenna Adapters
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Metra® 40-GM20 - Barbed Aftermarket Antenna to OEM Radio Adapter$28.89 + Free Shipping with iD FastTrack -
Metra® - Aftermarket Radio to OEM Antenna Adapter$23.32 + Free Shipping with iD FastTrack -
- Metra® - Replacement Style Antenna Mast$41.51 - $50.52
- Metra® 44-STUB - Rubber Mast$38.87 + Free Shipping with iD FastTrack
- Metra® - Antenna Adapter$14.40 - $31.53
- Metra® - OE Satellite Radio Antenna Adapter$40.05 + Free Shipping with iD FastTrack
