Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
As you can see in on page 11 ( actual page 7 of this manual) http://static.garmincdn.com/pumac/nuvi_55-65_OM_EN.pdf
You have to use the supplied vehicle power cable that has the traffic receiver built into it. Then, to use the lifetime traffic start navigating to a desitination, then tap the three bars / menu option, and tap traffic.
If you have further questions let me know.
I strive to provide great service, and greatly appreciate a 5 star rating clicked and submitted when you are satisfied.. I always answer follow up questions.Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.
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With that being said, in the future if you request tech support please be willing to stick with the process till the issue is resolved.