6x4 Sleeper Semi Trucks For Sale in United States

2019 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

$46,995 USD

2019 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 520,676 MILES, FLEET MAINTAINED MULTIPLE UNITS AVAILABLE FINANCING AVAILABLE FOR ALL CREDIT TYPES,...

Condition	Used
Usage	520,676 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	0144
MLS Number	13809611
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2021 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

$76,995 USD

DETROIT DD15 / AUTOMATIC TRANMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2021 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 357,184 MILES, FLEET...

Condition	Used
Usage	357,184 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	6937
MLS Number	13794524
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2020 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 455HP, 10 Speed Manual

$48,995 USD

2020 FREIGHTLINER CASCADIA 126, DETROIT DD15, 455HP, 10 SPEED MANUAL TRANSMISSION, 590,903 MILES, 3.08 RATIO, 227 WB, FLEET MAINTAINED FINANCING AVAILABLE FOR ALL CREDIT TYPES, ZERO...

Condition	Used
Usage	590,903 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	10 Speed Manual
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	3260
MLS Number	13794510
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2020 International LT Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, Automatic

$45,995 USD

CUMMINS X15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2020 INTERNATIONAL LT, CUMMINS X15, AUTOMATIC TRANSMISSION, 404,362 MILES, FLEET MAINTAINED, FINANCING...

Condition	Used
Usage	404,362 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	1723
MLS Number	13794500
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2020 International LT Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, Automatic

$43,995 USD

2020 INTERNATIONAL LT, CUMMINS X15, AUTOMATIC TRANSMISSION, 439,653 MILES, FLEET MAINTAINED MULTIPLE UNITS AVAILABLE FINANCING AVAILABLE FOR ALL CREDIT TYPES, ZERO DOWN AVAILABLE ON...

Condition	Used
Usage	439,653 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	1664
MLS Number	13794496
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

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2019 Peterbilt 579 Sleeper Semi Truck

$42,900 USD

ONLY 437k MILES! Thermoking APU installed! This 2019 Peterbilt 579 is powered by an MX13 510HP Engine and a 12 Speed Automatic Transmission! Dual Exhaust; Rear Cabin Door Access; Heated...

Condition	Used
Usage	437,183 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	510 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	80"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.25 ratio
Stock Number	8680018
MLS Number	13777192
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Indianapolis, IN, US
Sold By	JX Truck Center

2021 International LT Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, Automatic

$50,995 USD

CUMMINS X15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2021 INTERNATIONAL LT, CUMMINS X15, AUTOMATIC TRANSMISSION, 391,774 MILES, FLEET MAINTAINED MULTIPLE...

Condition	Used
Usage	391,774 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	9315
MLS Number	13760853
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

(855) 605-___ SHOW
NUMBERCall Seller

2013 Freightliner Cascadia 125 Sleeper Semi Truck - Flat Top Sleeper, Detroit 475HP, 10 Speed Manual

$8,500 USD

Truck came in on trade. Has a cylinder leaking coolant into engine. Can be bought as is until we have time to fix it

Condition	Used
Usage	520,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	475 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	10 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.55 ratio
Stock Number	BTS5766
MLS Number	13760569
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Great Falls, MT, US
Sold By	Bouma Truck Sales

2021 International LT Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, Automatic

$48,995 USD

CUMMINS X15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2021 INTERNATIONAL LT, CUMMINS X15, AUTOMATIC TRANSMISSION, 407,177 MILES, FLEET MAINTAINED MULTIPLE...

Condition	Used
Usage	407,177 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	7071
MLS Number	13749894
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2020 International LT Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, Automatic

$45,995 USD

2020 INTERNATIONAL LT, CUMMINS X15, AUTOMATIC TRANSMISSION, 428,882 MILES, FLEET MAINTAINED MULTIPLE UNITS AVAILABLE FINANCING AVAILABLE FOR ALL CREDIT TYPES, ZERO DOWN AVAILABLE ON...

Condition	Used
Usage	428,882 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	1575
MLS Number	13749892
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2020 International LT Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, Automatic

$45,995 USD

CUMMINS X15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2020 INTERNATIONAL LT, CUMMINS X15, AUTOMATIC TRANSMISSION, 423,021 MILES, FLEET MAINTAINED MULTIPLE...

Condition	Used
Usage	423,021 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	1749
MLS Number	13749888
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2020 International LT Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, Automatic

$46,995 USD

CUMMINS X15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2020 INTERNATIONAL LT, CUMMINS X15, AUTOMATIC TRANSMISSION, 418,153 MILES, FLEET MAINTAINED WE HAVE...

Condition	Used
Usage	418,153 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	1761
MLS Number	13749885
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2020 International LT Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, Automatic

$47,995 USD

CUMMINS X15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2020 INTERNATIONAL LT, CUMMINS X15, AUTOMATIC TRANSMISSION, 398,573 MILES, FLEET MAINTAINED WE HAVE...

Condition	Used
Usage	398,573 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	1418
MLS Number	13744395
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

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2020 Kenworth T680 Sleeper Semi Truck - Cummins 400HP

$39,900 USD

BEAUTIFUL BLUE! 2020 Kenworth T680 with Cummins X15 Engine at 450hp paired with a 13 Speed MANUAL Transmission; Spacious Single Bunk Sleeper; Rear Climate Control; Stainless Steel Front...

Condition	Used
Usage	595,493 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Manual
Sleeper Type	Raised Roof Sleeper
Sleeper Size	76"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.25 ratio
Stock Number	8680002
MLS Number	13721008
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Bolingbrook, IL, US
Sold By	JX Truck Center

2020 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

$55,995 USD

DETROIT DD15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2020 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 473,442 MILES, FLEET...

Condition	Used
Usage	473,442 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	0881
MLS Number	13712053
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2021 Freightliner Cascadia 126 Sleeper Semi Truck - Mid Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$64,995 USD

DETROIT DD15 / AUTOMATIC TRANSMISSION / APU / PTO / FLEET MAINTAINED / FINANCING AVAILABLE 2021 FREIGHTLINER CASCADIA 126, MID-ROOF XT SLEEPER, 428,111 MILES, DETORIT DD15 ENGINE, DETROIT...

Condition	Used
Usage	428,111 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Mid Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	5778
MLS Number	13688194
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2021 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

$69,995 USD

DETROIT DD15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2021 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 389,395 MILES, FLEET...

Condition	Used
Usage	389,395 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	7138
MLS Number	13688191
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2021 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

$70,995 USD

DETROIT DD15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2021 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 370,584 MILES, FLEET...

Condition	Used
Usage	370,584 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	7098
MLS Number	13688190
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2023 International LT Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, 12 Speed Automatic

$64,995 USD

2023 INTERNATIONAL LT, CUMMINS X15, AUTOMATIC TRANSMISSION, 282,878 MILES, FLEET MAINTAINED, READY TO WORK FINANCING AVAILABLE FOR ALL CREDIT TYPES, ZERO DOWN AVAILABLE ON APPROVED...

Condition	Used
Usage	282,878 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.64 ratio
Stock Number	2827
MLS Number	13683498
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2020 Kenworth T680 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, Automatic

$53,995 USD

CUMMINS X15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2020 KENWORTH T680, CUMMINS X15, AUTOMATIC TRANSMISSION, 486,415 MILES, FLEET MAINTAINED, READY TO WORK ...

Condition	Used
Usage	486,415 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	8538
MLS Number	13680194
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2021 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

$62,995 USD

DETROIT DD15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2021 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 456,101 MILES, FLEET...

Condition	Used
Usage	456,101 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	3250
MLS Number	13633975
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2021 Freightliner Cascadia 126 Sleeper Semi Truck

$64,995 USD

DETROIT DD15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2021 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 440,137 MILES, FLEET...

Condition	Used
Usage	440,137 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	3259
MLS Number	13612314
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2018 Freightliner Cascadia 126 Sleeper Semi Truck

$36,995 USD

DETROIT DD15 / AUTOMATIC TRANSMISSION / FLEET MAINTAINED / FINANCING AVAILABLE 2018 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 678,524 MILES, FLEET...

Condition	Used
Usage	678,524 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	0741
MLS Number	13612308
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2021 Volvo VNL64T760 Sleeper Semi Truck - D13 425HP, 12 Speed I Shift Automatic

$66,995 USD

2021 VOLVO 760, VOLVO D13 ENGINE, AUTOMATIC 12 SPEED, 421,914 MILES, FLEET MAINTAINED, ORIGINAL TIRES, VERY GOOD CONDITION, READY TO WORK FINANCING AVAILABLE FOR ALL CREDIT TYPES, ZERO...

Condition	Used
Usage	421,914 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	425 HP
Engine Model	Volvo D13
Drivetrain	6x4
Transmission	12 Speed I Shift Automatic
Suspension	Air Ride
Rear Axle	Tandem Axle
Stock Number	3432
MLS Number	13587283
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet