Which map do you need ASR for?
I have a nüvi 3580LMT with North American map. Difference with nüvi 3590LMT being:
nüvi 3580LMT = relabeled nüvi 3590LMT for Walmart and Costco
nüvi 3580LMT ships with GTM36 (non digital 3D traffic)
nüvi 3590LMT ships with GTM60 (digital 3D traffic)
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