Gray 6x4 Sleeper Semi Trucks For Sale

(844) 321-___ SHOW
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2020 Kenworth T680 Sleeper Semi Truck - 76" Raised Roof Sleeper, Cummins 400HP, 12 Speed Endurant Automatic

Recently Updated

$59,900 USD

Automatic 12SPD Endurant, X15 Efficiency Series Engine, 400 H.P, SPECIAL!!! - WAS $75,900 NOW $ 59,900 MUST GO,

Condition	Used
Usage	386,230 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	400 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	76"
Suspension	4 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	1600
MLS Number	14043560
Category	Sleeper Semi Trucks
Last Updated	1/24/2026
Location	Fontana, CA, US
Sold By	Yerevan Truck & Equipment Sales

2022 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, Automatic

Price Drop $62,900 USD

455 HP DD15 Engine with a DT12 Automatic Transmission on this 2022 Freightliner Cascadia! Equipped with Virgin Tires; APU; a Spacious 72in Double Bunk Sleeper; Deer Guard; Heated Mirrors;...

Condition	Used
Usage	502,960 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	8680212
MLS Number	13998214
Category	Sleeper Semi Trucks
Last Updated	1/22/2026
Location	Bolingbrook, IL, US
Sold By	JX Truck Center

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, Automatic

Price Drop $64,900 USD

ONLY 463K Miles! 455 HP DD15 Engine with a DT12 Automatic Transmission on this 2022 Freightliner Cascadia! Equipped with Virgin Tires; APU; a Spacious 72in Double Bunk Sleeper; Deer Guard;...

Condition	Used
Usage	463,974 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	8680210
MLS Number	13998209
Category	Sleeper Semi Trucks
Last Updated	1/22/2026
Location	Wyoming, MI, US
Sold By	JX Truck Center

2022 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, Automatic

Price Drop $64,900 USD

2022 Freightliner Cascadia with a STRONG 455 HP DD15 Engine with a DT12 Automatic Transmission! Equipped with Virgin Tires; APU; a Spacious 72in Double Bunk Sleeper; Deer Guard; Heated...

Condition	Used
Usage	469,915 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	8680209
MLS Number	13998207
Category	Sleeper Semi Trucks
Last Updated	1/22/2026
Location	Bolingbrook, IL, US
Sold By	JX Truck Center

2021 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Cummins 450HP, Automatic

Price Drop $56,900 USD

LOADED! This 2021 Peterbilt 579 is powered by a 450HP Cummins X15 Engine and paired with a smooth shifting 12 Speed Automatic Transmission. Truck has heated mirrors; air slide 5th wheel;...

Condition	Used
Usage	422,456 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
Sleeper Size	80"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	8680029
MLS Number	13798299
Category	Sleeper Semi Trucks
Last Updated	1/22/2026
Location	Wyoming, MI, US
Sold By	JX Truck Center

2021 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Cummins 450HP, Automatic

Price Drop $56,900 USD

LOADED! This 2021 Peterbilt 579 has a ton of features for you! This unit is powered by a 450HP Cummins X15 Engine and paired with an Automatic Transmission. Built with Adaptive Cruise...

Condition	Used
Usage	420,297 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
Sleeper Size	80"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	8680028
MLS Number	13767141
Category	Sleeper Semi Trucks
Last Updated	1/22/2026
Location	Indianapolis, IN, US
Sold By	JX Truck Center

2022 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, Automatic

Price Drop $62,900 USD

455 HP DD15 Engine with a DT12 Automatic Transmission on this 2022 Freightliner Cascadia! Equipped with Virgin Tires; APU; a Spacious 72in Double Bunk Sleeper; Deer Guard; Heated Mirrors;...

Condition	Used
Usage	474,667 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	8680211
MLS Number	13998212
Category	Sleeper Semi Trucks
Last Updated	1/22/2026
Location	Indianapolis, IN, US
Sold By	JX Truck Center

2020 Peterbilt 389 Sleeper Semi Truck - 70" Mid Roof Sleeper, Cummins 605HP, Manual

Recently Updated

$104,900 USD

BIG HP! 605hp on this 2020 Peterbilt 389 with a 78in Single Bunk Sleeper! Powered by a Cummins X15 and paired with an 18 Speed MANUAL Transmission and 46k Rears. Unit has full disc brakes;...

Condition	Used
Usage	426,098 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	605 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Manual
Sleeper Type	Mid Roof Sleeper
Sleeper Size	70"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	46,000 lb 3.58 ratio
Stock Number	8680123
MLS Number	13963666
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Elmhurst, IL, US
Sold By	JX Truck Center

2020 Peterbilt 389 Sleeper Semi Truck - 70" Mid Roof Sleeper, Cummins 605HP, Manual

Recently Updated

$104,900 USD

SHARP! 2020 Peterbilt 389 with all the right stuff and only 406k miles!! 605hp Cummins X15 Engine; 18 Speed Manual Transmission; Dual Exhaust; Stainless Steel Sun Visor; Meaty Tires; all...

Condition	Used
Usage	406,141 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	605 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Manual
Sleeper Type	Mid Roof Sleeper
Sleeper Size	70"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	46,000 lb 3.58 ratio
Stock Number	8680124
MLS Number	13963649
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Bolingbrook, IL, US
Sold By	JX Truck Center

2020 Peterbilt 389 Sleeper Semi Truck - 70" Mid Roof Sleeper, Cummins 605HP, Manual

Recently Updated

$94,900 USD

605HP Cummins X15 Engine with an 18 Speed MANUAL Transmission! This workhorse has 46k rears a wheelbase of 270in and a ratio of 3.58. Dual Stacks; Tons of Chrome including visor; air slide...

Condition	Used
Usage	572,228 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	605 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Manual
Sleeper Type	Mid Roof Sleeper
Sleeper Size	70"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	46 lb 3.58 ratio
Stock Number	8680127
MLS Number	13963633
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	Indianapolis, IN, US
Sold By	JX Truck Center

2020 Peterbilt 389 Sleeper Semi Truck - 70" Mid Roof Sleeper, Cummins 605HP, Manual

Recently Updated

$97,900 USD

APU Installed! This 2019 Peterbilt 389 is powered by a 605HP Cummins X15 Engine; an 18 Speed Manual Transmission; 46k Rears; Dual Exhaust Breathers; Heated Mirrors; LOTS of Chrome including...

Condition	Used
Usage	503,521 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	605 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Manual
Sleeper Type	Mid Roof Sleeper
Sleeper Size	70"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	46,000 lb 3.58 ratio
Stock Number	8680125
MLS Number	13963618
Category	Sleeper Semi Trucks
Last Updated	1/20/2026
Location	De Pere, WI, US
Sold By	JX Truck Center

(716) 218-___ SHOW
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2025 Peterbilt 567 Sleeper Semi Truck - 44" Flat Top Sleeper, Cummins 500HP, 13 Speed Manual

$187,000 USD

CHOICE OF 2 CUMMINS X15 500 HP,13 SPD MANUAL TRANS,460K RR,132 K FRT,3.73 RATIO,44" FLAT SLEEPER,11R22.5 TIRES RELATED STK TRK 276526.price includes FET and also 5/350 emission warranty and...

Condition	New
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	13 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	44"
Suspension	Air Trac
Rear Axle	Tandem Axle
Rear End	46,000 lb
Stock Number	276505
MLS Number	13459183
Category	Sleeper Semi Trucks
Last Updated	1/17/2026
Location	Buffalo, NY, US
Sold By	Hunter Truck

(833) 982-___ SHOW
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2025 Western Star 49X Sleeper Semi Truck - Flat Top Sleeper, Detroit 600HP, 18 Speed Manual

Contact for price

1266 Miles, Engine: DETROIT DD16, 600 HP, Fuel Type: Diesel, 18 Speed Manual Transmission, Drive: 6x4, Spring Suspension, Sleeper Type: Flat Top Sleeper, Sleeper Size: 36, Tires: 11R24.5,...

Condition	New
Usage	1,266 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	600 HP
Engine Model	Detroit DD16
Drivetrain	6x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	36"
Suspension	Spring
Rear Axle	Tandem Axle
Rear End	46,000 lb 4.30 ratio
Stock Number	WS4898
MLS Number	13218645
Category	Sleeper Semi Trucks
Last Updated	1/14/2026
Location	Houlton, ME, US
Sold By	Freightliner of Maine

2021 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Cummins 450HP, Automatic

$56,900 USD

LOADED ULTRALOFT! 2021 Peterbilt 579 with a Cummins X15 450HP Engine; 12 Speed Automatic Transmission; Adaptive Cruise Control; Lane Departure; Collision Avoidance; Heated Mirrors; Air Slide...

Condition	Used
Usage	424,609 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
Sleeper Size	80"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	8680027
MLS Number	13777203
Category	Sleeper Semi Trucks
Last Updated	1/10/2026
Location	De Pere, WI, US
Sold By	JX Truck Center

(855) 647-___ SHOW
NUMBERCall Seller

2022 Freightliner Cascadia Sleeper Semi Truck New Virgin Tires Free Warranty!

$54,999 USD

2022 Freightliner Cascadia. New Tires. Warranty!

Warranty

Condition	Used
Usage	520,013 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit Detroit Diesel DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Hi Rise Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.64 ratio
MLS Number	14080588
Category	Sleeper Semi Trucks
Last Updated	1/9/2026
Location	Bolingbrook, IL, US
Sold By	Arrow Truck Sales - Chicago, IL

(844) 882-___ SHOW
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2013 Freightliner Cascadia 125 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 475HP, 10 Speed Manual

$6,750 USD

Mechanic Special Opportunity, * This truck has been discovered to have fuel in the water. The most likely cause is the need for new injector cups. It runs and drive good otherwise. 2013...

Condition	Used
Usage	1,214,130 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	475 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	3.55 ratio
MLS Number	13486711
Category	Sleeper Semi Trucks
Last Updated	1/8/2026
Location	Phoenix, AZ, US
Sold By	American Truck Sales & Salvage

(855) 807-___ SHOW
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2023 Peterbilt 567 Sleeper Semi Truck - 32" Mid Roof Sleeper, Cummins 450HP, 18 Speed Manual

$124,500 USD

FLEET MAINTAINED, CLEAN 2023 PETE 579 WITH SMALL SLEEPER, CUMMINS POWER AND LOW MILES.WET-KIT, DIGITAL DASH, FULL LOCKERS, GOOD RUBBER, NO RUST, 200 GALL TANKS, AIR TRAC SUSPENSION, THICK...

Condition	Used
Usage	128,909 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	13 Speed Manual
Sleeper Type	Mid Roof Sleeper
Sleeper Size	36"
Suspension	Air Trac
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.55 ratio
Stock Number	7156
MLS Number	14036036
Category	Sleeper Semi Trucks
Last Updated	12/31/2025
Location	Houston, TX, US
Sold By	Southern Truck Sales Ltd

(833) 986-___ SHOW
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2024 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP

$137,900 USD

LOADED WITH WARRANTY EXTENDED DETROIT AND EXTENDED FREIGHTLINER WARRANTIES, CALL NOW, NICEST USED TRUCK IN THE MARKET

Warranty

Condition	Used
Usage	225,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	4 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	266348
MLS Number	14004794
Category	Sleeper Semi Trucks
Last Updated	12/14/2025
Location	Tampa, FL, US
Sold By	Southport Truck Group

(833) 300-___ SHOW
NUMBERCall Seller

2023 Kenworth T880 Sleeper Semi Truck - 42" Mid Roof Sleeper, Cummins 500HP, 18 Speed Manual

Contact for price

WEBASTO, BEACONS LIGHT,

Condition	Used
Usage	2,744 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15E
Drivetrain	6x4
Transmission	18 Speed Manual
Sleeper Type	Mid Roof Sleeper
Sleeper Size	42"
Suspension	8 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	46,000 lb 3.91 ratio
Stock Number	C-37176
MLS Number	14025329
Category	Sleeper Semi Trucks
Last Updated	1/21/2026
Location	Montreal/ Ile-aux-noix/Toronto/NY, QC, Canada
Sold By	Gamache Truck Center

(855) 980-___ SHOW
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2016 Kenworth W900L Sleeper Semi Truck - Raised Roof Sleeper, Cummins 550HP, 18 Speed Manual

$66,500 USD

2016 KENWORTH W900L, SLEEPER TRUCK, CUMMINS ISX 550HP, 18 SPEED TRANSMISSION, DSP40 3.36 REARENDS, AIR RIDE SUSPENSION, AIR RIDE CAB, 22.5 ALUMINUM WHEELS, NEW STEER TIRES, HEADACHE RACK,,

Condition	Used
Usage	621,746 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	550 HP
Engine Model	Cummins ISX15
Drivetrain	6x4
Transmission	18 Speed Manual
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	3.36 ratio
Stock Number	497884-KWC
MLS Number	13381179
Category	Sleeper Semi Trucks
Last Updated	12/5/2025
Location	OGDEN, UT, US
Sold By	Rocky Mountain Truck Parts

2022 Kenworth T680 Sleeper Semi Truck - 76" Raised Roof Sleeper, Paccar 455HP, Automatic

$54,900 USD

ONLY 419k miles on this 2022 Kenworth T680 with a 455hp MX13 Engine and 12 Speed Automatic Transmission; Deer Guard; Hood Mirrors; Heated Mirrors; 12 Speed Automatic Transmission with Hill...

Condition	Used
Usage	419,624 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	76"
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	8680157
MLS Number	13985943
Category	Sleeper Semi Trucks
Last Updated	12/4/2025
Location	Pewaukee, WI, US
Sold By	JX Truck Center

(844) 216-___ SHOW
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2019 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Mid Roof Sleeper, Detroit 450HP, 12 Speed Dt12 Amt

Contact for price

60 Inch Mid-Roof XT Sleeper, Detroit DD13 Engine, 450 H.P., Engine Brake, DT12 Transmission, (Automatic), 40,000 Lb. Rear Ends, 3.23 Ratio, Air Ride Suspension, Hydraulic Power Steering, Air...

Condition	Used
Usage	540,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Mid Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.23 ratio
Stock Number	KR5038
MLS Number	13712688
Category	Sleeper Semi Trucks
Last Updated	11/20/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

(844) 988-___ SHOW
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2015 Freightliner Cascadia 125 Sleeper Semi Truck - Mid Roof Sleeper, Detroit 470HP, Automatic

$29,900 USD

2015 FREIGHTLINER CASCADIA. Mid-Roof Sleeper. Detroit DD15 Engine. DT12 Automatic Transmission. Front Axle Air Ride. Air Ride Suspension. All Aluminum Wheels. Truck Will Come DOT Ready,...

Condition	Used
Usage	774,596 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	470 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Mid Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.23 ratio
Stock Number	GF9179
MLS Number	11866464
Category	Sleeper Semi Trucks
Last Updated	11/16/2025
Location	Roseville, MN, US
Sold By	Universal Truck Sales

(833) 300-___ SHOW
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2023 Volvo VNL64T400 Sleeper Semi Truck - 36" Mid Roof Sleeper, Cummins 605HP, 18 Speed Manual

Contact for price

BEACONS LIGHT, WEBASTO,

Condition	Used
Usage	6,004 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	605 HP
Engine Model	Cummins X15P
Drivetrain	6x4
Transmission	18 Speed Manual
Sleeper Type	Mid Roof Sleeper
Sleeper Size	36"
Suspension	Neway
Rear Axle	Tandem Axle
Rear End	46,000 lb 3.91 ratio
Stock Number	C-37084
MLS Number	13985991
Category	Sleeper Semi Trucks
Last Updated	1/21/2026
Location	Montreal/ Ile-aux-noix/Toronto/NY, QC, Canada
Sold By	Gamache Truck Center