Question about Garmin Nuvi 660 GPS Receiver

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I about to purchase the Garmin Nuvi 660 and I just wanted to make sure that it would be compatible with XM radio? Will the signal or reception from one affect the other? Or are they ok?

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I have both a 660 and problems

Posted on May 04, 2008


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Posted on Jan 02, 2017


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Will a garmin gtm 20 charger work with a garmin nuvi 660 gps

Yes! The GTM-20 is a charger with a built-in traffic receiver. The charger plugs into the cradle for the Nuvi 660 and then the Nuvi 660 snaps into the cradle.

However to receive traffic with the GTM-20, you will need to purchase a subscription, either yearly or lifetime. The traffic receiver receives traffic information from FM radio broadcast stations, which broadcast traffic data.

Feb 23, 2014 | Garmin GPS

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No unlock code for Garmin Nuvi 660

Sorry but that is a security feature. There is a chance you've purchased a stolen unit from ebay. Unfortunately, only Garmin can unlock it and they will require a receipt from a Garmin dealer.

Jan 10, 2009 | Garmin Nuvi 660 GPS Receiver

1 Answer

Gps garmin nuvi 660

Please read the solution that resolved this problem for someone else. Most likely, you have already tried this. However, the antenna of your Nuvi 660 is the same as the 3xx Nuvi series. I know this because I have worked on them.

If the above procedure does not work for you, the entire antenna assembly will need to be replaced.
The other option is to purchase an external antenna for your Nuvi and plug it into the external antenna port (gold connector) on the Nuvi antenna assembly.

Best wishes,
- Jim

Oct 26, 2008 | Garmin Nuvi 660 GPS Receiver

2 Answers

Data card for nuvi 660

No, you do not require an additional SD card for your unit in order for it to operate. Also, you can purchase ANY SD card and it will work with additional maps and POIs. They are upselling you.

It doesn't sound like you're buying from a reputable Garmin dealer. Make sure they're a Garmin dealer in case you have any problems.

Apr 10, 2008 | Garmin Nuvi 660 GPS Receiver

1 Answer

Garmin nuvi 660

You will have to send it back to Garmin showing proof of purchase. Garmin will clear the PIN.

Jan 28, 2008 | Garmin Nuvi 660 GPS Receiver

3 Answers

Audiobooks on a Garmin Nuvi 650 GPS

I just read on the Garmin website that only regular MP3 files will work -- not books or music purchased through iTunes.

Dec 29, 2007 | Garmin Nuvi 660 GPS Receiver

1 Answer

Hard wiring the Nuvi 660

Make sure you use the proper kit for hardwiring. The Garmin DC adapter setp down the voltage from 12vdc to 5vdc. If you don't get the right kit you could fried your unit.

Nov 02, 2007 | Garmin Nuvi 660 GPS Receiver

1 Answer

Map fro Garmin

As far as I know you can only buy maps from Garmin, or a Garmin retailer.  The 660 should have all the maps for North America already loaded in it.

You can purchase Points of Interest (POI) databases from a variety of sources.  Just google POI.  These are not maps but they are adresses for points of interest such as restaurants, special services, and even speed trap cameras.

Oct 13, 2007 | Garmin Nuvi 660 GPS Receiver

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