Quick verdict
The Garmin dēzl OTR820 is our recommended choice for drivers who want a smaller and lighter truck GPS. The Garmin dēzl OTR1020 is better for drivers who prefer a larger navigation screen.
Both devices have the same verified truck navigation and connected features. They support custom truck routing, satellite arrival imagery, PrePass, CAT Scale locations, and truck parking information. Both also include map updates and live traffic, weather, and fuel prices.
The main differences are screen size, physical dimensions, and weight.
The OTR820 has an 8-inch screen and weighs 14.3 oz. The OTR1020 has a larger 10.1-inch screen and weighs 19.5 oz. Both screens have a resolution of 1280 × 800 pixels.
For most drivers, the choice depends on preferred screen size and available mounting space, not navigation features.
Why choose Garmin dēzl™ OTR820?
Choose the Garmin dēzl OTR820 if you want a truck GPS that takes up less space in your cab.
The OTR820 has an 8-inch screen with a resolution of 1280 × 800 pixels. It measures 7.87 × 4.92 × 0.79 inches and weighs 14.3 oz.
It is smaller and 5.2 oz lighter than the OTR1020. This can be useful if you have limited dashboard or windshield space. The lower weight can also make the device easier to handle when you move it between trucks.
The OTR820 has the same screen resolution as the larger model. Because its screen is smaller, it has a higher pixel density. This can make text and map details look sharper at the same viewing distance.
You do not lose any of the verified truck navigation features when you choose the smaller model.
The OTR820 supports truck-specific routing based on vehicle dimensions and weight. It also provides hazmat support, bridge height warnings, weight limit warnings, and steep grade alerts.
Additional features include satellite arrival imagery, community loading dock information, PrePass support, CAT Scale locations, and truck parking information.
Both models have a stated battery life of 2 hours. Live traffic, weather, and fuel prices are available through a compatible smartphone and the Garmin dēzl app.
Choose the OTR820 if compact size, lower weight, and higher pixel density are your priorities.
Why choose Garmin dēzl OTR1020?
Choose the Garmin dēzl OTR1020 if you want a larger display for truck navigation.
The OTR1020 has a 10.1-inch screen with a resolution of 1280 × 800 pixels. The larger screen gives you more display area for maps, route information, and navigation menus.
This can be useful when the GPS is mounted farther from the driver. The larger display can make text and route details easier to view without moving closer to the device.
The OTR1020 measures 9.65 × 6.06 × 0.83 inches and weighs 19.5 oz. It is larger and heavier than the OTR820. Check that you have sufficient mounting space and a suitable mount before you buy.
Despite its larger screen, the OTR1020 has the same resolution as the OTR820. It does not display more pixels, but it shows them on a larger surface.
The OTR1020 includes the same verified truck navigation and connected features as the OTR820. These include custom truck routing, hazmat support, satellite arrival imagery, community loading dock information, PrePass, and CAT Scale locations.
Its stated battery life is 2 hours, which is the same as the OTR820.
There is no verified difference in routing functions, map updates, or live services.
Choose the OTR1020 if a larger navigation display is more important than device size and weight.
Garmin dēzl™ OTR820
An 8-inch dedicated truck GPS with custom truck routing, BirdsEye satellite arrival imagery, community truck-parking insights and Garmin’s connected trucking features.
Garmin dēzl OTR1020
An extra-large 10.1-inch dedicated truck GPS with custom truck routing, BirdsEye satellite arrival imagery, community truck-parking insights and Garmin’s connected trucking features.
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Key differences
Weight
Screen size
Full comparison
Rows with different values are highlighted. “Not verified” means TruckerDude has not confirmed that feature from a reliable source; it does not mean the feature is absent.
| Feature | Garmin dēzl™ OTR820 | Garmin dēzl OTR1020 |
|---|---|---|
| Key specifications | ||
| Brand | Garmin | Garmin |
| Device type | Dedicated GPS | Dedicated GPS |
| Built-in dash cam | No | No |
| Release year | 2024 | 2024 |
| Screen size | 8 in | 10.1 in |
| Screen resolution | 1280 x 800 | 1280 x 800 |
| Dimensions | 7.87 × 4.92 × 0.79 in | 9.65 × 6.06 × 0.83 in |
| Weight | 14.3 oz | 19.5 oz |
| Battery life | 2 hours | 2 hours |
| Wi-Fi | Yes | Yes |
| Bluetooth | Yes | Yes |
| Connectivity | ||
| Live services connection | Smartphone app | Smartphone app |
| Smartphone app required | Yes | Yes |
| Map updates included | Yes | Yes |
| Truck navigation | ||
| Truck-specific routing | Yes | Yes |
| Truck height input | Yes | Yes |
| Truck weight input | Yes | Yes |
| Truck length input | Yes | Yes |
| Truck width input | Yes | Yes |
| Hazmat support | Yes | Yes |
| Bridge height warnings | Yes | Yes |
| Weight limit warnings | Yes | Yes |
| Steep grade warnings | Yes | Yes |
| Weigh station alerts | Yes | Yes |
| Connected & trucker features | ||
| PrePass support | Yes | Yes |
| CAT Scale | Yes | Yes |
| Truck parking | Yes | Yes |
| Satellite arrival imagery | Yes | Yes |
| Community loading docks | Yes | Yes |
| Live traffic | Yes | Yes |
| Live weather | Yes | Yes |
| Live fuel prices | Yes | Yes |
Final recommendation
We recommend the Garmin dēzl OTR820 for drivers who want a smaller and lighter truck GPS. It provides the same verified navigation and connected features as the OTR1020 in a more compact device.
Choose the Garmin dēzl OTR1020 if you want the largest display of these two models. Its 10.1-inch screen provides more space to view maps and navigation information. This can be useful when the GPS is mounted at a greater distance from the driver.
Both models have the same verified screen resolution, battery life, truck routing functions, and connected services. Neither has a verified advantage in navigation accuracy or software performance.
Compare current prices, check the available mounting space, and select the screen size that best meets your needs.
Both GPS units can calculate routes based on truck dimensions and restrictions. However, map information can be incomplete or out of date. Always follow road signs and check bridge clearances, weight limits, and local restrictions.