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Garmin GTM20 Lifetime Traffic Receiver

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Garmin GTM20 Lifetime Traffic Receiver

The GTM 20 is an integrated FM TMC (Traffic Message Channel) traffic receiver, antenna and cigarette lighter adapter. Designed exclusively for the American version of the StreetPilot c5-series and zmo, it receives digital information (where available) on traffic and road construction tie-ups that your compatible Garmin unit uses to offer an alternate route. TMC data, available in a fast-growing number of cities throughout North America and Europe, gives prompt, accurate notification of accidents, road construction, police, or emergency action, etc. so you can visually monitor traffic flow and, if necessary, avoid traffic tie-ups.

In most areas, depending on the service provider, TMC traffic broadcasts ar e continuous there's no waiting for scheduled traffic news updates or random alerts. With the GTM 20, you see traffic developments in real-time, as they happen, so you can make the right decision sooner. The system alerts you when a traffic problem is on your route and proposes an alternate route to avoid the incident. Because traffic broadcasts are received via a "silent" FM data channel, you can still listen to music or news programming on your car radio without interference from incoming FM traffic data transmissions.




  • Sends real-time traffic information to your compatible Garmin navigator
  • Warns of traffic jams, accidents, emergency activity, and construction
  • Lifetime free subscription to traffic-information service
  • Self-contained antenna and 12-volt cigarette lighter adapter
  • See below for compatible Garmin models

Shipping Cost: Free!

Return Policy: Within 30 in the original packaging

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Review Snapshot

  • 4 of 5 stars
45% (20)
16% (7)
12% (5)
7% (3)
23% (10)
  • Excellent Garmin GTM 20 with Lifetime Traffic   »   Most Recent Review “Works as described. Used it for a 2200 mile road trip and there is coverage available in all major cities in US and Canada.”
  • Well worth the purchase   »   Most Helpful Reviews “I have to deal with a daily work commute in excess of an hour each way, across LA county. I've generally tried to check traffic conditions on the web before I take off, but…”
  • Useless   »   Most Helpful Critical Reviews “There are a complicated series of steps required to activate the subscription, but there are no instructions included that explain how to go through all the steps (including…”