Thread: Using TMC in Garmin nuvi for free

Originally Posted by OneBadTexican

I have tried to follow your instructions for obtaining an unlock code to obtain traffic capability. I have a Nuvi 760 and a GTM 20 traffic receiver. When I go to ADD in the traffic menu I do NOT get a traffic receiver ID. All I get is my unit number. Am I supposed to get an ID number from the GTM 20 itself? Even if I were to obtain a traffic receiver ID number, where do I input it in the Jetmouse Keygen? There is only a Unit ID entry. Is that supposed to be used to input the ID's for both the Nuvi and the GTM 20? I am confused.

I assume you are doing all of this with both the GTM and 760 powered up (you must be to have gotten an ID).

That ID you got in the ADD Subscription dialog IS the 10 digit unit ID from the GTM 20 (and the ONLY one you need for the kegen). It is NOT the unit ID for your 760.
If you want the UnitID for the 760 look at
Tools > Settings > System > About
and your 760 ID will be in the upper left hand corner. You will see that the 2 UnitID's are different.

FYI - The GTM 20 UnitID and any subscription Keys you enter are stored in the GTM, none of that data is saved in the GPS which is why A "Traffic Enabled" GTM-20 will then work on any 7xx GPS or any model that is compatable with a GTM-20. The Traffic interface on the 760 is just a mechanism for you (the user) to communicate with the GTM for the purpose of adding or renewing expired subscriptions.