I bought a Garmin c330 as a back up system to the laptop with streets & Trips.
It only seems to pick up the satellites if I mount it on the left side of the drivers windshield.
If I mount it near or under the rear view mirror or on right side of the windshield it doesn't work very well.
I think the electronics in the rear view mirror must interfere with the GPS in the Garmin.
The wiring from the mirror run to the right side of the truck.
It doesn't seem to bother the receiver for streets & Trips.
J&D
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