What are the most popular brands of semi trucks in the US?

The most popular semi truck brands in the US, known for their reliability, performance, and widespread use, include: Freightliner: Explore our current Freightliner semi truck listings here. International: Find your next International semi truck here. Peterbilt: Browse all available Peterbilt semi trucks for sale. Kenworth: View our selection of Kenworth semi trucks. Volvo: Discover Volvo semi trucks currently available. Mack: See our inventory of Mack semi trucks.

How many miles is too many on a used semi truck?

A well-maintained semi truck engine is built to run 750,000 to over 1,000,000 miles before a major overhaul. Mileage alone isn't the right filter — service history, engine condition, and whether the truck has had any major powertrain work matter more. A 600,000-mile truck with documented maintenance and recent engine work can be a better buy than a 400,000-mile truck with no service records.

Should I buy a day cab or sleeper semi truck?

It depends on your operation. If your routes are regional or local and drivers return home nightly, a day cab is the more practical and cost-efficient choice — it's lighter, simpler, and less expensive to maintain. If you're running long-haul or OTR freight where drivers spend nights on the road, a sleeper provides the comfort and compliance with hours-of-service regulations that an OTR operation requires.

Can I search semi trucks by location on Comvoy?

Yes. Comvoy lets you filter semi truck listings by location so you can find trucks available near you or in a specific state — reducing transport costs and making it easier to inspect before you buy. You can also filter by make, model year, mileage, and price to narrow results to your exact spec.

How much weight can a semi truck carry?

The legal limit for a loaded semi-truck in the US is 80,000 pounds, though the actual capacity can vary depending on the truck and trailer configuration.

How many gears do semi trucks have?

They can have up to 18 gears, providing the necessary torque and power for hauling heavy loads efficiently.

How much fuel do semi trucks use?

Fuel efficiency varies depending on engine size, load weight, and driving conditions, but expect lower mpg than cars, typically around 5-8 mpg.

Do you need a special license to drive a semi truck?

Yes, a Commercial Driver's License (CDL) with specific endorsements is required to operate a semi-truck legally.

What are the challenges of being a truck driver?

Long hours on the road, loneliness, traffic congestion, and dealing with varying weather conditions are some of the challenges truck drivers face.

What kinds of trailers can semi trucks haul?

Semi trucks can haul many different types of trailers. The most commonly hauled trailers are dry vans, reefers, flatbeds, tankers, and lowboys.

Semi Trucks for Sale near Longmont, Colorado

Used 2019 Freightliner Cascadia - photo 1

Used 2019 Freightliner Cascadia - photo 2

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$45,495

speed 267,828 mi

location_on

Ryder Used Trucks

Taylor, MI (1,140.8 mi)

Used 2021 Freightliner Cascadia - photo 1

Used 2021 Freightliner Cascadia - photo 2

Used 2021 Freightliner Cascadia Cummins X15 Day Cab Truck

$48,495

speed 463,365 mi

location_on

Ryder Used Trucks

Taylor, MI (1,140.8 mi)

Used 2020 Freightliner Cascadia - photo 1

Used 2020 Freightliner Cascadia - photo 2

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$45,000

speed 498,858 mi

location_on

Penske Used Trucks

Allen Park, MI (1,143.9 mi)

Used 2022 Freightliner Cascadia - photo 1

Used 2022 Freightliner Cascadia - photo 2

Used 2022 Freightliner Cascadia Detroit DD15AT Day Cab Truck

$60,750

speed 436,016 mi

location_on

Penske Used Trucks

Allen Park, MI (1,143.9 mi)

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$46,000

speed 486,695 mi

location_on

Penske Used Trucks

Allen Park, MI (1,143.9 mi)

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

$66,250

speed 688,672 mi

sell

Key features

D13
6x4

location_on

Penske Used Trucks

Allen Park, MI (1,143.9 mi)

Used 2020 Freightliner Cascadia Cummins X15 Day Cab Truck

$36,750

speed 582,020 mi

location_on

Penske Used Trucks

Allen Park, MI (1,143.9 mi)

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

$84,500

speed 483,269 mi

sell

Key features

D13
6x4

location_on

Penske Used Trucks

Allen Park, MI (1,143.9 mi)

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$43,250

speed 512,880 mi

location_on

Penske Used Trucks

Allen Park, MI (1,143.9 mi)

New 2025 Ford F-600 Ford Sleeper Truck

$58,888

location_on

56 Auto Sales

London, OH (1,145.1 mi)

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

$44,500

speed 302,343 mi

location_on

Penske Used Trucks

Warren, MI (1,154.9 mi)

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

$84,750

speed 499,756 mi

sell

Key features

D13
6x4

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

$41,500

speed 547,269 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$56,750

speed 675,268 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$69,000

speed 541,433 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Detroit DD13 Semi Trucks / Tractors

$34,750

speed 560,502 mi

sell

Key features

DD13
6x4
Day Cab

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

$43,750

speed 485,271 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

$84,250

speed 511,442 mi

sell

Key features

D13
6x4

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2022 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$73,000

speed 566,829 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$61,750

speed 627,091 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$53,250

speed 354,634 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Cummins X15 Day Cab Truck

$45,250

speed 445,059 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2018 Freightliner Cascadia - photo 1

Used 2018 Freightliner Cascadia - photo 2

Used 2018 Freightliner Cascadia Detroit DD13 Day Cab Truck

$42,750

speed 410,316 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$55,750

speed 327,587 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Detroit DD13 Semi Trucks / Tractors

$41,500

speed 479,212 mi

sell

Key features

DD13
6x4
Day Cab

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

$81,750

speed 528,116 mi

sell

Key features

D13
6x4

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2018 Freightliner Cascadia Detroit DD13 Day Cab Truck

$43,000

speed 404,509 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$71,750

speed 503,411 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

$40,250

speed 529,310 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$63,750

speed 598,816 mi

location_on

Penske Used Trucks

Cleveland, TN (1,156.4 mi)

Semi Trucks for Sale near Longmont, Colorado

Filters

4,840 results

Applied

Location

Condition

Listing Type

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2021 Freightliner Cascadia Cummins X15 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2022 Freightliner Cascadia Detroit DD15AT Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

Used 2020 Freightliner Cascadia Cummins X15 Day Cab Truck

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

New 2025 Ford F-600 Ford Sleeper Truck

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD13 Semi Trucks / Tractors

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

Used 2022 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 Freightliner Cascadia Cummins X15 Day Cab Truck

Used 2018 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD13 Semi Trucks / Tractors

Used 2022 Volvo VNL Volvo D13 Semi Trucks / Tractors

Used 2018 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

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