what do i need to install my new stereo?
I have a 2004 pontiac grand am. I am getting a Sony CDX-GT420U stereo. I looked on crutchfield.com and it fits. but, the installation details say this:
“Your vehicle is factory-equipped with an upgraded sound system. We strongly recommend that you purchase an adapter that maintains your factory door chimes (required for audible safety warnings) and provides a switched 12-volt power source for your new radio. You should not replace your factory radio without this adapter.
Metra VT-GMOS-04 $99.99″
what does this mean? do i really need this adapter? what are the advantages of the adapter?
is there a cheaper adapter that i can get? and where?
Your factory radio is a part of the vehicle’s data bus system. One of the radio’s functions is to generate the audible warning chimes. Your door chime, seatbelt chime, lights-left-on chime, etc are all generated by the stock radio and play through the driver’s door speaker.
In addition, there’s no key-switched “accessory” power wire in the factory radio harness. The stock deck is switched on and off by digital signals through the vehicle’s data bus system. This makes it a little more difficult to install an after-market head unit, because an after-market deck needs a key-switched power source.
If you buy the adapter, it will link to the vehicle data bus in place of the radio. It will interpret the digital codes and generate the warning chimes. It will also provide an accessory power source for the after-market head unit.
You can install the deck without the module, but you’ll lose all the warning chimes in the vehicle. You’ll also have to find a place to connect the new deck’s accessory power wire.
Metra 40-GM10 GM Antenna Adapter
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AXXESS METRA ASWC ADAPTER FOR OEM STEERING WHEEL CONTROLS $44.80 |
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Axxess Metra ASWC OEM Steering Wheel Control Adapter $49.99 |
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Axxess Metra ASWC OEM Steering Wheel Control Adapter Interface FREE SHIPPING $49.99 |
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Axxess Metra ASWC OEM Steering Wheel Control Adapter $49.90 |
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Metra ASWC OEM Universal Steering Wheel Control Adapter $49.90 |
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METRA STEERING WHEEL ADAPTOR PIONEER SONY ASWI-PS – OPEN BOX SWIPS $36.00 |
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Metra 40-KI30 Kia/Amanti 07-Up Antenna Adaptor $32.29 |
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METRA BT-6502LONG Interface Adapter – Car Hands-free Kit $31.05 |
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METRA 40-LX30 LEXUS ANTENNA ADAPTER FOR FM MOD $34.99 |
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METRA 40-KI30 HYUNDAI KIA 2009-UP ANTENNA ADAPTOR $32.99 |
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Metra 40-NI31 Infinity/Nissan 87-06 Antenna Adaptor $32.89 |
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Metra 40-VW54 Aftermarket VW Antenna Adaptor $28.58 |
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METRA INSTALLATION ANTENNA ADAPTOR VOLVO * 40-VL30 * $22.99 |
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Metra 40-NI31 Infinity/Nissan 87-06 Antenna Adaptor $27.75 |
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METRA FMMOD02 Audio Adapter 88.9MHz-88.5MHz $30.00 |
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METRA 40-HD30 HONDA ANTENNA ADAPTOR FOR FM MOD $29.99 |
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Metra 40-SB30 (met-40sb30) Antenna Adapter Kit for Select Subaru Vehicles $29.99 |
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Metra 99-9008 Radio Kit/Wire Harness/Ant. Adapter Combo $29.95 |
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Metra Electronics 40-NI31 -NISSAN ADAPTERS FOR CD – Kit $29.87 |
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Metra Electronics 40-NI30 -NISSAN ADAPTERS FOR CD – Kit $29.87 |
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Metra 40-VW54 Aftermarket VW Radio Roof Atenna Adaptor $29.47 |
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Metra 99-6503 Radio Kit/Wire Harness/Ant. Adapter Combo $29.00 |
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Metra 40-HD30 (40hd30) Antenna Adapter Kit for Select Honda and Acura Vehicles $28.99 |
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Metra 40-VW54 Aftermarket VW Roof Antenna Adaptor $24.59 |
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Metra 82-5500 Ford Mercury Speaker Adapters 5″ 3 Hole $27.10 |
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Metra 82-3043 Speaker Adapters $15.99 |
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METRA 40-EU55 ANTENNA ADAPTER CABLE FOR SELECT 2002-UP VOLKSWAGEN BMW VEHICLES $26.95 |
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Metra 40-SB30 Subaru Antenna Adaptor $23.52 |
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METRA EU10 BMW EUROPEAN CAR FACTORY ANTENNA TO AFTERMARKET RADIO ADAPTER $26.00 |
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METRA EU10 BMW EUROPEAN CAR FACTORY ANTENNA TO AFTERMARKET RADIO ADAPTER $26.00 |
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METRA EU10 BMW EUROPEAN CAR FACTORY ANTENNA TO AFTERMARKET RADIO ADAPTER $25.95 |
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METRA 40-VW53 1997-1999 AUDI A6 ANTENNA ADAPTER AUDIO RADIO INSTALLATION STEREO $25.95 |
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METRA 1998-1999 AUDI A4 QUATTRO AVANT CAR ANTENNA ADAPTER AUDIO RADIO STEREO $25.95 |
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METRA 2006 VOLKSWAGEN BEETLE TDI ANTENNA ADAPTER AUDIO RADIO INSTALLATION STEREO $25.95 |
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METRA 1997-1999 AUDI A8 QUATTRO ANTENNA ADAPTER AUDIO RADIO INSTALLATION STEREO $25.95 |
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METRA 1998-2002 VOLKSWAGEN JETTA GLX CAR ANTENNA ADAPTER AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1999 VOLKSWAGEN GOLF GL CAR ANTENNA ADAPTER AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1999 VOLKSWAGEN GOLF GLS ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1998-2005 VOLKSWAGEN BEETLE ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 2002-2004 VOLKSWAGEN BEETLE TURBO S ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1999 AUDI A6 QUATTRO AVANT ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1997-2002 BMW Z3 ROADSTER ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 2001 VOLKSWAGEN BEETLE SPORT ANTENNA ADAPTER AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1997-1999 AUDI A8 ANTENNA ADAPTER AUDIO RADIO INSTALLATION STEREO $25.95 |
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METRA 40-VW53 1999 VOLKSWAGEN GOLF TDI CAR ANTENNA ADAPTER AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1998 VOLKSWAGEN JETTA K2 ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 1998-2002 VOLKSWAGEN JETTA TDI CAR ANTENNA ADAPTER AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1997-1998 AUDI CABRIOLET CAR ANTENNA ADAPTER AUDIO RADIO STEREO $25.95 |
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METRA 2003-2006 DODGE SPRINTER 3500 ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1997-1999 AUDI A6 QUATTRO ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 2003-2006 DODGE SPRINTER 2500 ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1999-2001 VOLKSWAGEN PASSAT ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 1999-2002 VOLKSWAGEN GOLF GTI ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 2005 VOLKSWAGEN BEETLE GLS TDI ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 2006-2007 VOLKSWAGEN BEETLE 2.5 ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 2008 VOLKSWAGEN BEETLE S CAR ANTENNA ADAPTER AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1999-2002 BMW Z3 M COUPE CAR ANTENNA ADAPTER AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1998-2002 BMW Z3 M ROADSTER ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 2000-2006 AUDI TT ANTENNA ADAPTER AUDIO RADIO INSTALLATION STEREO $25.95 |
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METRA 40-VW53 2008 VOLKSWAGEN BEETLE SE ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1999-2002 BMW Z3 COUPE ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 1998-2002 VOLKSWAGEN JETTA GL ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1998 VOLKSWAGEN PASSAT GLS ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1998 VOLKSWAGEN JETTA GT ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 1998 VOLKSWAGEN PASSAT GLX ANTENNA ADAPTER AUDIO RADIO INSTALLATION STEREO $25.95 |
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METRA 1998-2002 VOLKSWAGEN JETTA GLS ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 2000-2006 AUDI TT QUATTRO ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 2002 VOLKSWAGEN JETTA ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 2000-2002 VOLKSWAGEN GOLF ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1998-2001 VOLKSWAGEN JETTA ANTENNA ADAPTER CAR AUDIO RADIO STEREO $25.95 |
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METRA 40-VW53 1998 AUDI A4 AVANT ANTENNA ADAPTER AUDIO RADIO INSTALLATION STEREO $25.95 |
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Metra 40-EU30 (met-40eu30) 2002-up BMW/Volkswagen Vehicle Antenna Adapter Kit $24.99 |
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FORD FM MOD MODULATOR ANTENNA ADAPTER KIT METRA 40-CR30 $24.95 |
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GMC FM MOD MODULATOR ANTENNA ADAPTER KIT METRA 40-CR30 $24.95 |