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 2020 Freightliner Cascadia - photo 1

Used 2020 Freightliner Cascadia - photo 2

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$34,950

speed 547,471 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2016 Mack TD713 Day Cab Truck

$84,950

speed 444,390 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2014 Western Star 4900 Detroit DD15 TC Day Cab Truck

$17,950

speed 146,476 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2020 Volvo VNR Volvo D11 Semi Trucks / Tractors

$44,950

speed 274,064 mi

sell

Key features

D13
4x2

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

$69,950

speed 550,700 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2019 International HX Cummins X15, Signature Day Cab Truck

$29,950

speed 446,769 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$37,950

speed 272,067 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2017 International TranStar 8600 - photo 1

Used 2017 International TranStar 8600 - photo 2

Used 2017 International TranStar 8600 Navistar N13 Day Cab Truck

$19,950

speed 211,702 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

$87,950

speed 383,784 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2020 Kenworth W990 Paccar MX/MX-13 Day Cab Truck

$74,950

speed 276,000 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$87,950

speed 388,520 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Freightliner Cascadia - photo 1

Used 2023 Freightliner Cascadia - photo 2

Used 2023 Freightliner Cascadia Detroit DD15 Sleeper Truck

$74,950

speed 472,921 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$87,950

speed 387,747 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$34,950

speed 534,163 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2024 Volvo VNR 300 Volvo D13 Day Cab Truck

$69,950

speed 115,186 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

$79,950

speed 416,892 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2005 Freightliner Columbia - photo 1

Used 2005 Freightliner Columbia - photo 2

Used 2005 Freightliner Columbia Detroit Series 60 Day Cab Truck

$27,950

speed 469,494 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

$79,950

speed 407,402 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 International LT Cummins X15, Signature Sleeper Truck

$64,950

speed 433,322 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$87,950

speed 374,727 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$92,950

speed 330,145 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$32,950

speed 448,876 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$44,950

speed 437,432 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$92,950

speed 324,062 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

$69,950

speed 522,775 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2024 Volvo VNR 300 Volvo D13 Semi Trucks / Tractors

$75,000

speed 96,203 mi

sell

Key features

D13

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2024 Volvo VNR 300 Volvo D13 Semi Trucks / Tractors

$72,500

speed 124,492 mi

sell

Key features

D13

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2020 Kenworth T800 Cummins ISX / X15 Semi Trucks / Tractors

$74,950

speed 460,183 mi

sell

Key features

X15
6x4

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$84,950

speed 408,400 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Used 2022 Kenworth T680 Paccar MX/MX-13 Sleeper Truck

$64,950

speed 484,555 mi

location_on

American Motors

Commerce City, CO (26.9 mi)

(720) 389-2582

Semi Trucks for Sale near Longmont, Colorado

Filters

4,853 results

Applied

Location

Condition

Listing Type

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2016 Mack TD713 Day Cab Truck

Used 2014 Western Star 4900 Detroit DD15 TC Day Cab Truck

Used 2020 Volvo VNR Volvo D11 Semi Trucks / Tractors

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

Used 2019 International HX Cummins X15, Signature Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2017 International TranStar 8600 Navistar N13 Day Cab Truck

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

Used 2020 Kenworth W990 Paccar MX/MX-13 Day Cab Truck

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2023 Freightliner Cascadia Detroit DD15 Sleeper Truck

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2024 Volvo VNR 300 Volvo D13 Day Cab Truck

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

Used 2005 Freightliner Columbia Detroit Series 60 Day Cab Truck

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

Used 2023 International LT Cummins X15, Signature Sleeper Truck

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

Used 2024 Volvo VNR 300 Volvo D13 Semi Trucks / Tractors

Used 2024 Volvo VNR 300 Volvo D13 Semi Trucks / Tractors

Used 2020 Kenworth T800 Cummins ISX / X15 Semi Trucks / Tractors

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2022 Kenworth T680 Paccar MX/MX-13 Sleeper Truck

Frequently Asked Questions about Semi Trucks / Tractors

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