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Garmin dezl OTR620 Review

A Garmin dezl OTR620 review for truckers: the full dezl feature set on a 6-inch screen, what the smaller display costs you, and when to step up to the OTR720.

Updated August 21, 2026

The verdict: The OTR620 gives you Garmin's complete truck feature set, routing by size and weight, bridge and curve alerts, CAT Scale locations, parking community and services directory, for roughly half the price of the 10-inch flagship. Buy it if you glance at turn prompts and want the cheapest way into a real truck navigator. Skip it if you study the map, where 6 inches makes split-screen and junction views cramped.

Six inches, the same routing engine as the $700 model, and the compromise you actually feel.

Best value truck GPS

Garmin dezl OTR620 6-inch GPS Truck Navigator

~$340

A 6-inch truck navigator with custom routing by truck size and weight, bridge height and curve alerts, BirdsEye arrival imagery, CAT Scale locations and the dezl truck parking community.

Check price on Amazon

Specifications

Screen 6-inch touchscreen
Routing Custom truck routing by size and weight, not available in all areas
Alerts Upcoming bridge heights, sharp curves and more
Arrival planning BirdsEye Direct satellite imagery of the destination
Weight CAT Scale locations across the US and Canada
Parking Truck parking community ratings, requires the dezl app
Weather Wind speed overlay and high wind alerts, requires the dezl app
Weigh stations PrePass notifications, requires an active PrePass account

Specifications above come from Garmin's published product information. Treat pricing as approximate, since Amazon pricing moves.

What it does well

  • The identical feature set to the far more expensive dezl models, which is unusual and genuinely good value.
  • A 6-inch device fits mounting positions a 10-inch one cannot, including cabs where windshield space is tight.
  • Bridge height and curve alerts, the features that earn a truck navigator its place, are all here.
  • Included North America map updates rather than a subscription.
  • Lighter and easier on a suction mount than the larger models, which is a real durability advantage.

Where it falls short

  • Split-screen route and weather views are cramped at 6 inches. If that is a feature you want, buy the 7-inch model.
  • The connected features need the dezl app on a paired phone: traffic, weather, parking ratings, PrePass.
  • PrePass also needs an active PrePass account, separately arranged.
  • No dash cam built in.
  • Garmin states truck routing is not available in all areas and posted signs govern, so the device is an aid, not a compliance tool.

What owners report

The recurring line in published owner reviews of the smaller dezl units is that buyers are surprised how little they gave up. That is a fair reading of the range: Garmin does not withhold routing quality from the cheaper model. What you give up is display area, and whether that matters depends entirely on how you use a navigator. Drivers who mostly want the next turn and a bridge warning are well served. Drivers who like to see the whole route with weather beside it will find 6 inches tight and should spend the extra on the OTR720.

The complaints match the rest of the line. The phone dependency for connected features catches people out. Route choices occasionally puzzle drivers, which is universal and is why Garmin's own notes tell you to defer to posted signs. Mounts get replaced.

For context on how compressed this product range is, our OTR710 versus OTR620 comparison works through two adjacent models and finds most of the difference is display and generation rather than capability. That is the single most useful fact when shopping this line: buy on screen size and price, because the routing is the same. The best trucking GPS roundup ranks the field, and Garmin versus Rand McNally handles the brand question, with our TND 750 review covering the main rival.

Worth repeating because it is the thing drivers get wrong: the CAT Scale finder locates a scale, it does not tell you whether your axles are legal. That is decided at the shipper by how the load sits and where the tandems are. Our payload calculator and the GVWR and payload guide are the tools for that, and how to weigh your truck covers reading the ticket.

Who it suits

  • Drivers buying their first dedicated truck navigator who do not want to spend $700.
  • Cabs where a large device would block a mirror or a chunk of the windshield.
  • Anyone who mostly wants turn prompts, bridge alerts and truck stop information rather than map study.

Who should skip it

  • Drivers who want the split-screen weather and route view usable at a glance.
  • Anyone with tired eyes who will end up leaning toward the screen, which is the case for a bigger unit.
  • Drivers who want navigation and a dash cam in one device.

Alternatives worth considering

Step-Up Alternative

Garmin dezl OTR720 7-inch GPS Truck Navigator

~$450

The same everything on a 7-inch screen, which is where split-screen views and junction detail become comfortable. The upgrade most drivers are happy they made.

Check price on Amazon
Older 7-inch

Garmin dezl OTR710 7-inch GPS Truck Navigator

~$350

The previous-generation 7-inch unit, often close to the OTR620 in price. A bigger screen for similar money if you are comfortable buying the older model.

Check price on Amazon
Other Brand

Rand McNally TND 750 7-inch GPS Truck Navigator

~$380

A 7-inch alternative with fuel-price weighted routing and Rand's truck POI database, for drivers who prefer that approach to route planning.

Check price on Amazon

Keep reading

This review draws on published specifications, manufacturer figures and the consensus of verified owner reviews. We have not tested this product ourselves, and we say so rather than implying otherwise. As an Amazon Associate we earn from qualifying purchases.

Frequently asked

Is the OTR620 missing features compared with more expensive dezl units?
Not meaningfully. Custom truck routing by size and weight, bridge height and curve alerts, BirdsEye arrival imagery, CAT Scale locations, the truck parking community, weather overlays and the services directory are all present. The difference across the range is screen size, and to a lesser degree device generation.
Is a 6-inch screen too small for a truck GPS?
It depends how you use it. For turn prompts, upcoming alerts and truck stop searches, 6 inches is fine and it mounts in places a bigger unit cannot. For studying a whole route with a weather overlay beside it, it is tight, and the 7-inch OTR720 is worth the extra.
Does the OTR620 work without a phone?
Navigation does. Truck routing, alerts and the preloaded North America maps are all on the device. What needs the dezl app on a paired smartphone is the connected layer: live traffic, weather overlays, high wind alerts, parking community ratings and PrePass notifications.
OTR620 vs OTR710: which should I buy?
The OTR710 is a previous-generation 7-inch unit and the OTR620 is a current 6-inch one, and they often sell close in price. If you want the larger screen and do not mind the older generation, take the 710. If you want the newer device and can live with 6 inches, take the 620. Our OTR710 versus OTR620 comparison goes through it.
Will it keep me off low bridges?
It will warn you about bridge heights it knows about on a route built from the dimensions you entered, which is a real help. It is not a guarantee, and Garmin says so: truck routing is not available everywhere, and posted signs govern. Enter your dimensions accurately and keep reading the signs.

TruckingCalc provides free educational information and estimates, not tax, legal, accounting, or safety advice. Rules and rates change; verify anything that affects your taxes, compliance, or safety with a qualified professional and the official source. As an Amazon Associate we earn from qualifying purchases.