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.

Used Semi Trucks / Trucks for Sale in Colorado

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

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$87,950

speed 387,747 mi

location_on

American Motors

Commerce City, CO

Used 2024 Volvo VNR 300 Volvo D13 Day Cab Truck

$69,950

speed 115,186 mi

location_on

American Motors

Commerce City, CO

Used 2020 Freightliner Cascadia - photo 1

Used 2020 Freightliner Cascadia - photo 2

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$48,500

speed 414,777 mi

location_on

Penske Used Trucks

Denver, CO

Used 2022 Freightliner Cascadia - photo 1

Used 2022 Freightliner Cascadia - photo 2

Used 2022 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$72,250

speed 535,581 mi

location_on

Penske Used Trucks

Aurora, CO

Used 2021 Freightliner Cascadia - photo 1

Used 2021 Freightliner Cascadia - photo 2

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$82,750

speed 401,538 mi

location_on

Penske Used Trucks

Aurora, CO

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$55,829

speed 679,673 mi

location_on

Ryder Used Trucks

Commerce City, CO

Used 2019 Freightliner Cascadia - photo 1

Used 2019 Freightliner Cascadia - photo 2

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$40,106

speed 687,714 mi

location_on

Ryder Used Trucks

Commerce City, CO

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

$79,950

speed 416,892 mi

location_on

American Motors

Commerce City, CO

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

Used 2023 Peterbilt 579 Cummins ISX Sleeper Truck

$79,950

speed 407,402 mi

location_on

American Motors

Commerce City, CO

Used 2023 International LT Cummins X15, Signature Sleeper Truck

$64,950

speed 433,322 mi

location_on

American Motors

Commerce City, CO

Used 2023 International LT Cummins X15, Signature Day Cab Truck

$44,950

speed 244,606 mi

location_on

MHC Internet Truck Sales

Denver, CO

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$72,250

speed 376,104 mi

location_on

Penske Used Trucks

Aurora, CO

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$73,750

speed 488,964 mi

location_on

Penske Used Trucks

Aurora, CO

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

$35,000

speed 619,999 mi

location_on

Penske Used Trucks

Aurora, CO

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$57,250

speed 782,313 mi

location_on

Penske Used Trucks

Aurora, CO

Used 2021 Volvo VNL Volvo D13 TC Semi Trucks / Tractors

$69,750

speed 209,238 mi

sell

Key features

D13 TC
6x4

location_on

Penske Used Trucks

Aurora, CO

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$49,140

speed 565,111 mi

location_on

Ryder Used Trucks

Commerce City, CO

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$87,950

speed 374,727 mi

location_on

American Motors

Commerce City, CO

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$92,950

speed 330,145 mi

location_on

American Motors

Commerce City, CO

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$75,950

speed 422,994 mi

location_on

MHC Internet Truck Sales

Denver, CO

Used 2020 Kenworth T880 Paccar MX/MX-13 Day Cab Truck

$64,950 List Price

$59,950

speed 531,116 mi

location_on

MHC Internet Truck Sales

Denver, CO

Used 2023 International LT Cummins X15, Signature Day Cab Truck

$39,950

speed 345,372 mi

location_on

MHC Internet Truck Sales

Denver, CO

Used 2020 Kenworth T880 Paccar MX/MX-13 Semi Trucks / Tractors

$59,950

speed 549,214 mi

sell

Key features

MX13 EPA17
6x4

location_on

MHC Internet Truck Sales

Denver, CO

Used 2019 International LT Cummins X15, Signature Sleeper Truck

$39,950

speed 524,390 mi

location_on

MHC Internet Truck Sales

Denver, CO

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$84,250

speed 414,273 mi

location_on

Penske Used Trucks

Aurora, CO

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

$62,000

speed 745,221 mi

location_on

Penske Used Trucks

Denver, CO

Used 2021 International LT Cummins X15, Signature Sleeper Truck

$48,334

speed 597,942 mi

location_on

Ryder Used Trucks

Commerce City, CO

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$34,120

speed 620,886 mi

location_on

Ryder Used Trucks

Commerce City, CO

Used Semi Trucks / Trucks for Sale in Colorado

Filters

147 results

Applied

Location

Condition

Listing Type

Used 2023 Freightliner Cascadia Detroit DD15 Sleeper Truck

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2024 Volvo VNR 300 Volvo D13 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2022 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Sleeper 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 International LT Cummins X15, Signature Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Volvo VNL Volvo D13 TC Semi Trucks / Tractors

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2023 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2020 Kenworth T880 Paccar MX/MX-13 Day Cab Truck

Used 2023 International LT Cummins X15, Signature Day Cab Truck

Used 2020 Kenworth T880 Paccar MX/MX-13 Semi Trucks / Tractors

Used 2019 International LT Cummins X15, Signature Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

Used 2021 International LT Cummins X15, Signature Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Frequently Asked Questions about Semi Trucks / Tractors

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