Used 6x4 Flat Top Sleeper Semi Trucks For Sale

(844) 985-___ SHOW
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2021 Kenworth T880 Sleeper Semi Truck - 40" Flat Top Sleeper, Cummins 500HP, Manual

Newly Listed

$76,900 USD

WET KIT! SMALL BUNK SLEEPER! This 2021 Kenworth T880 with 14600 Fronts and 46k Rears is coming with Dual Exhaust Stacks; 40in Single Bunk Sleeper; Hood Mirrors; a Cummins X15 500HP Engine...

Condition	Used
Usage	414,365 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	40"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	46,000 lb 3.58 ratio
Stock Number	8680273
MLS Number	14157365
Category	Sleeper Semi Trucks
Last Updated	2/25/2026
Location	Pewaukee, WI, US
Sold By	JX Truck Center

(844) 985-___ SHOW
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2021 Kenworth T880 Sleeper Semi Truck - 40" Flat Top Sleeper, Cummins 500HP, Manual

Newly Listed

$79,900 USD

374036 Miles, Engine: CUMMINS X15, 500 HP, Fuel Type: Diesel, Manual Transmission, Drive: 6x4, Air Ride Suspension, Sleeper Type: Flat Top Sleeper, Sleeper Size: 40, Wheel Base: 224, Tandem...

Condition	Used
Usage	374,036 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	40"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	46,000 lb 3.58 ratio
Stock Number	8680274
MLS Number	14157364
Category	Sleeper Semi Trucks
Last Updated	2/21/2026
Location	Pewaukee, WI, US
Sold By	JX Truck Center

(833) 904-___ SHOW
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2014 Peterbilt 389 Sleeper Semi Truck - 48" Flat Top Sleeper, Paccar 455HP, 18 Speed Manual

Newly Listed

$59,000 USD

2014 Peterbilt 389 flat top, MX13, 18 speed manual, 46k rears with full lockers, 787k miles, Nationwide delivery available,

Condition	Used
Usage	787,591 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	48"
Suspension	Air Trac
Rear Axle	Tandem Axle
Rear End	46,000 lb 4.30 ratio
Stock Number	7565
MLS Number	14156103
Category	Sleeper Semi Trucks
Last Updated	2/20/2026
Location	Sawyer, KS, US
Sold By	The Wrays, LLC

(855) 605-___ SHOW
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2023 Kenworth T680 Sleeper Semi Truck - Flat Top Sleeper, Paccar 405HP, Automatic

1987 White 7400 Sleeper Semi Truck - Flat Top Sleeper, Caterpillar 350HP, 9 Speed Manual

Price Drop $15,500 USD

1987 White 7400, CAT 3406, 350 H.P., 9 Speed Manual Transmission, Jake brake, Flattop Sleeper, This Truck Runs Great and would make a great Farm/Ranch Truck, or Extra Truck for your Fleet

Condition	Used
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	350 HP
Engine Model	Caterpillar 3406
Drivetrain	6x4
Transmission	9 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Spring
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	BTS5682
MLS Number	14045894
Category	Sleeper Semi Trucks
Last Updated	2/18/2026
Location	Great Falls, MT, US
Sold By	Bouma Truck Sales

(844) 481-___ SHOW
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2019 Peterbilt 389 Sleeper Semi Truck - Flat Top Sleeper, Paccar 485HP, 13 Speed Manual

$79,500 USD

2019 PETERBILT 389 FLATTOP, SOLID WHITE, PACCAR MX-13 485 HP, DUAL STACK, DUAL BREATHER, 40K REARS, 13PD MANUAL TRANSMISSION, AIR RIDE SUSPENSION, 11R24.5, ALUMINUM WHEELS, SLIDING FIFTH...

Condition	Used
Usage	636,538 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	485 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	13 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
MLS Number	14025410
Category	Sleeper Semi Trucks
Last Updated	2/20/2026
Location	Jackson, TN, US
Sold By	Snider Equipment

(844) 956-___ SHOW
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2020 Kenworth T680 Sleeper Semi Truck - 40" Flat Top Sleeper, Paccar 455HP, 12 Speed Endurant Amt

$69,500 USD

Paccar MX-13 6 Cylinder 12.9 L Ultra Low Sulfur Diesel 455 hp Engine, 2018 US EPA Label, Requires Diesel Exhaust Fluid, Engine Coolant Heater, 100 gal Left Fuel Tank 100 gal Right Fuel Tank,...

Condition	Used
Usage	480,424 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	40"
Suspension	AG 400L
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	C5370
MLS Number	14097582
Category	Sleeper Semi Trucks
Last Updated	2/20/2026
Location	West Sacramento, CA, US
Sold By	DeWald Equipment

(844) 956-___ SHOW
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2022 Peterbilt 389 Sleeper Semi Truck - 63" Flat Top Sleeper, Cummins 565HP, 18 Speed Manual

$149,900 USD

X15 565HP, Eaton Fuller RTLO18918B 18 Speed Transmission, Air Ride Front Axle, Dana Spicer DSP40 Rear Axles 3.42 Ratio, 63" Flat Top Sleeper w/ Platinum Interior Leather Seats, 20" Boxed End...

Condition	Used
Usage	605,097 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	565 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	63"
Suspension	Low Air
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.42 ratio
Stock Number	C5371
MLS Number	14052313
Category	Sleeper Semi Trucks
Last Updated	2/17/2026
Location	West Sacramento, CA, US
Sold By	DeWald Equipment

(855) 807-___ SHOW
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2016 Peterbilt 389 Sleeper Semi Truck - 48" Flat Top Sleeper, Cummins 485HP, 10 Speed Manual

$64,500 USD

PETERBILT 389 FLATTOP, 176K ON OVERHAUL WITH PAPERWORK, CUMMINS ISX15, 485HP, 10 SPEED MANUAL TRANSMISSION, 8 BRAND NEW DRIVE TIRES, 48" SLEEPER, DUAL STACKS AND BREATHERS, JAKES,...

Condition	Used
Usage	819,040 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	485 HP
Engine Model	Cummins ISX15
Drivetrain	6x4
Transmission	10 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	48"
Suspension	Air Trac
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.55 ratio
Stock Number	7132
MLS Number	13916588
Category	Sleeper Semi Trucks
Last Updated	2/17/2026
Location	Houston, TX, US
Sold By	Southern Truck Sales Ltd

(833) 478-___ SHOW
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2020 Freightliner Cascadia 116 Sleeper Semi Truck - 42" Flat Top Sleeper, Detroit 450HP, 12 Speed Dt12 Automatic

Contact for price

2020 Freightliner Cascadia 116 – Fleet Maintained Ready to Roll Stock #6830 Super Light Super clean fleet-maintained Cascadia with great miles and all the right specs for a starter truck...

Condition	Used
Usage	513,791 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Flat Top Sleeper
Sleeper Size	42"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	6830
MLS Number	13879664
Category	Sleeper Semi Trucks
Last Updated	2/18/2026
Location	Palmetto, GA, US
Sold By	7E Truck Sales, LLC

(855) 980-___ SHOW
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2015 Peterbilt 389 Sleeper Semi Truck - Flat Top Sleeper, Cummins, Manual

Contact for price

407414 Miles, 17001 Hours, Engine: CUMMINS ISX, Fuel Type: Diesel, Manual Transmission, Drive: 6x4, Sleeper Type: Flat Top Sleeper, Tandem Rear Axles

Condition	Used
Usage	17,001 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Engine Model	Cummins ISX
Drivetrain	6x4
Transmission	Manual
Sleeper Type	Flat Top Sleeper
Rear Axle	Tandem Axle
MLS Number	14142766
Category	Sleeper Semi Trucks
Last Updated	2/13/2026
Location	OGDEN, UT, US
Sold By	Rocky Mountain Truck Parts

(833) 904-___ SHOW
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2008 Peterbilt 389 Sleeper Semi Truck - Flat Top Sleeper, Cummins 500HP, 18 Speed Manual

$59,500 USD

2008 Peterbilt 389 Flattop Sleeper, 500hp Cummins ISX 15, 18spd Manual Transmission, 928k Mi, Air ride suspension, 270in Wheelbase, Nationwide Delivery Available

Condition	Used
Usage	928,489 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins ISX15
Drivetrain	6x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	38,000 lb
Stock Number	6728
MLS Number	14142730
Category	Sleeper Semi Trucks
Last Updated	2/13/2026
Location	Sawyer, KS, US
Sold By	The Wrays, LLC

2012 Peterbilt 365 Sleeper Semi Truck - 36" Flat Top Sleeper, Cummins 410HP, 8Ll Manual

$30,000 USD

GOOD TRUCK, RUNS EXCELLENT! *LOW MILES* POWER RIGHT WINDOW, AIR SEAT, DIFFERENTIAL LOCK, DUMP VALVE, HEAVY DUTY TRUCK!,

Condition	Used
Usage	254,434 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	410 HP
Engine Model	Cummins ISX15
Drivetrain	6x4
Transmission	8LL Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	36"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.90 ratio
Stock Number	12PETE254FLAT365
MLS Number	14006487
Category	Sleeper Semi Trucks
Last Updated	2/13/2026
Location	Covington, TN, US
Sold By	Don Baskin Truck Sales

(866) 530-___ SHOW
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2020 Kenworth W900 Sleeper Semi Truck - Flat Top Sleeper, Cummins 565HP, 18 Speed Manual

$119,995 USD

2020 KENWORTH W900, Cummins X15 565 hp, 18 Speed Transmission, 3.55 Ratio, Air ride suspensions, 270" Wheelbase FINANCING AVAILABLE FOR ALL CREDIT TYPES, ZERO DOWN AVAILABLE ON APPROVED...

Condition	Used
Usage	497,147 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	565 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.55 ratio
Stock Number	0724
MLS Number	13436827
Category	Sleeper Semi Trucks
Last Updated	2/18/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

(855) 489-___ SHOW
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2020 Peterbilt 579 Sleeper Semi Truck - 44" Flat Top Sleeper, Paccar 455HP, 12 Speed Endurant Amt

$36,000 USD

Includes 6 month/50k Mile Premium 2000 Warranty (Engine, Turbo, Injectors, Aftertreatment), 455hp with Endurant 12 Speed Transmission, 44" Flat Top Sleeper,

Condition	Used
Usage	618,718 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	44"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.64 ratio
Stock Number	2188
MLS Number	13987056
Category	Sleeper Semi Trucks
Last Updated	2/7/2026
Location	Rhome, TX, US
Sold By	Jordan Truck Sales of Texas, LLC

(855) 489-___ SHOW
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2020 Peterbilt 579 Sleeper Semi Truck - 44" Flat Top Sleeper, Paccar 455HP, 12 Speed Endurant Amt

$36,000 USD

Price Includes 6 month/50k Mile Premium 2000 Warranty (Engine, Turbo, Injectors, Aftertreatment), 455hp with Endurant 12 Speed Transmission, 44" Flat Top Sleeper,

Condition	Used
Usage	589,489 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	44"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.64 ratio
Stock Number	2144
MLS Number	13862637
Category	Sleeper Semi Trucks
Last Updated	2/7/2026
Location	Rhome, TX, US
Sold By	Jordan Truck Sales of Texas, LLC

(609) 318-___ SHOW
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2023 Peterbilt 567 Sleeper Semi Truck

$119,900 USD

Balance of FACTORY WARRANTY / Financing Available Balance of 5yr/400,000 mile Engine, Aftertreatment, Base Vehicle transfers to new owner!!! 2023 PETERBILT 567 58" SLEEPER, PLEASE CALL...

Condition	Used
Usage	280,097 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	58"
Suspension	Low Air
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	259222
MLS Number	13568455
Category	Sleeper Semi Trucks
Last Updated	2/12/2026
Location	Millstone Township, NJ, US
Sold By	Hunter Truck

(844) 216-___ SHOW
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1997 Freightliner FLD120 Sleeper Semi Truck - Cummins 389HP, 10 Speed Manual

$10,500 USD

Manual 10 Speed, N14 Red Top, Rated to 500 HP, 3.73 Rears, 215” WB, 12,000 Fronts, 40,000 Rears,

Condition	Used
Usage	1,131,880 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	460 HP
Engine Model	Cummins N14 CELECT PLUS
Drivetrain	6x4
Transmission	10 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	3.73 ratio
Stock Number	691178
MLS Number	13502025
Category	Sleeper Semi Trucks
Last Updated	1/31/2026
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

(844) 435-___ SHOW
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2024 Kenworth W900 Sleeper Semi Truck - 54" Flat Top Sleeper, Cummins 400HP, 18 Speed Manual

$199,900 USD

Remaining Factory warranty on engine and aftertreatment

Condition	Used
Usage	52,023 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	605 HP
Drivetrain	6x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	54"
Rear Axle	Tandem Axle
Rear End	46,000 lb 4.30 ratio
Stock Number	330481
MLS Number	13481377
Category	Sleeper Semi Trucks
Last Updated	1/31/2026
Location	Saco, ME, US
Sold By	Allegiance Trucks

2015 Freightliner Coronado 122 SD Sleeper Semi Truck - 42" Flat Top Sleeper, Detroit 450HP, 10 Speed Manual

$28,000 USD

NICE TRUCK, RUNS EXCELLENT, WET KIT, DUAL EXHAUST, FULL LOCKING REARS, DUMP VALVE, SLIDING 5TH, POWER WINDOWS, POWER MIRRORS, HEATED MIRRORS, SUPER NICE TRUCK! *SOUTHERN TRUCK/ NOT RUSTY!,

Condition	Used
Usage	813,601 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	10 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	42"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.42 ratio
Stock Number	15DET813FLATCOR
MLS Number	14053841
Category	Sleeper Semi Trucks
Last Updated	1/30/2026
Location	Covington, TN, US
Sold By	Don Baskin Truck Sales

2008 Peterbilt 365 Sleeper Semi Truck - 30" Flat Top Sleeper, Caterpillar 445HP, 8Ll Manual

$24,000 USD

NICE TRUCK, WELL MAINTAINED, RUNS EXCELLENT, DUMP VALVE, DIFFERENTIAL LOCK, SLIDING 5TH, POWER RIGHT WINDOW, POWER MIRRORS, HEATED MIRRORS, TILT/TELE!,

Condition	Used
Usage	403,079 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	445 HP
Engine Model	Caterpillar C13
Drivetrain	6x4
Transmission	8LL Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	30"
Suspension	Air Trac
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.90 ratio
Stock Number	08C13403FLAT365
MLS Number	13957940
Category	Sleeper Semi Trucks
Last Updated	1/30/2026
Location	Covington, TN, US
Sold By	Don Baskin Truck Sales

2013 Peterbilt 388 Sleeper Semi Truck - Flat Top Sleeper, Paccar 490HP, 13 Speed Manual

$45,000 USD

GOOD TRUCK, RUNS GREAT, FULL GAUGE PACKAGE, FULL LOCKING REARS, DUAL EXHAUST, DUAL BREATHERS, DUAL AIR RIDE SEATS, TILT/TELE, POWER WINDOWS, POWER MIRRORS, HEATED MIRRORS,,

Condition	Used
Usage	589,133 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	490 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	13 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	13MX589FLAT388
MLS Number	13755641
Category	Sleeper Semi Trucks
Last Updated	1/30/2026
Location	Covington, TN, US
Sold By	Don Baskin Truck Sales

(609) 318-___ SHOW
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2020 Kenworth T880 Sleeper Semi Truck - 40" Flat Top Sleeper, Paccar 455HP, 12 Speed Amt

$52,900 USD

READY FOR WORK!,

Condition	Used
Usage	354,836 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	40"
Suspension	8 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	285286
MLS Number	14081928
Category	Sleeper Semi Trucks
Last Updated	1/21/2026
Location	Millstone Township, NJ, US
Sold By	Hunter Truck

(855) 605-___ SHOW
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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