Geotab GO9

The GO9's main selling point isn't a feature on a spec sheet, it's how little disruption installing it causes. For most light and medium-duty vehicles with a standard OBD-II or 9-pin diagnostic port, the device plugs directly in with no antennas to mount and no wiring to run, which means a technician can typically install an entire fleet's worth of devices in a single visit rather than scheduling extended downtime per vehicle.

That plug-and-play design also matters for fleets that rotate or lease vehicles. A device that doesn't require permanent modification to install is just as easy to remove and reinstall in a replacement vehicle, which keeps tracking continuity intact through normal fleet turnover instead of treating every vehicle swap as a new installation project.

Not every vehicle in a mixed fleet has a standard OBD-II port. Older vehicles, and many heavy-duty trucks and off-road equipment, either lack one entirely or use a different diagnostic standard the GO9's default harness isn't built for. The 3-wire tracking option exists specifically for that gap, delivering the same location and trip data through a hardwired connection instead of a diagnostic port.

Choosing between the two isn't really a preference decision, it's determined by what the vehicle actually has available. High Point GPS checks port compatibility against your specific fleet mix before shipping hardware, so a fleet with a handful of older vehicles alongside newer ones typically ends up running both installation types side by side rather than forcing one approach across everything.