12 Speed 6x4 Sleeper Semi Trucks with 500-549 HP For Sale

Featured Item

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2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$78,999 USD

Brand New Virgin Drive Tires. Great condition and well maintained fleet truck. Ready to make $$$$$. OK Credit, Bad Credit, No Credit, WE WILL GET YOU FINANCED. Please call Adam at ( or...

Condition	Used
Usage	386,281 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
MLS Number	12297146
Category	Sleeper Semi Trucks
Last Updated	8/14/2024
Location	Selma, CA, US
Sold By	Selma Truck Sales

Featured Item

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2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$74,999 USD

8 Brand New Drive Tires. Fleet Maintained Clean Truck Great condition and well maintained fleet truck. DPF cleaned. 8 Brand New Tires. Ready to make $$$$$. OK Credit, Bad Credit, No Credit,...

Condition	Used
Usage	407,195 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
MLS Number	11967292
Category	Sleeper Semi Trucks
Last Updated	8/14/2024
Location	Selma, CA, US
Sold By	Selma Truck Sales

Featured Item

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2018 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$58,999 USD

Brand New Virgin Drive Tires. Great condition and well maintained fleet truck. Ready to make $$$$$. OK Credit, Bad Credit, No Credit, WE WILL GET YOU FINANCED. Please call Adam at ( or...

Condition	Used
Usage	404,625 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	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
MLS Number	10070531
Category	Sleeper Semi Trucks
Last Updated	8/14/2024
Location	Selma, CA, US
Sold By	Selma Truck Sales

Featured Item

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2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$81,999 USD

Brand New Virgin Drive Tires. Great condition and well maintained fleet truck. Ready to make $$$$$. OK Credit, Bad Credit, No Credit, WE WILL GET YOU FINANCED. Please call Adam at ( or...

Condition	Used
Usage	341,149 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
MLS Number	12348483
Category	Sleeper Semi Trucks
Last Updated	8/14/2024
Location	Selma, CA, US
Sold By	Selma Truck Sales

Featured Item

9 0

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$79,999 USD

Brand New Virgin Drive Tires. Great condition and well maintained fleet truck. Ready to make $$$$$. OK Credit, Bad Credit, No Credit, WE WILL GET YOU FINANCED. Please call Adam at ( or...

Condition	Used
Usage	367,050 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
MLS Number	12123253
Category	Sleeper Semi Trucks
Last Updated	8/14/2024
Location	Selma, CA, US
Sold By	Selma Truck Sales

Featured Item

9 0

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$79,999 USD

Brand New Virgin Drive Tires. Great condition and well maintained fleet truck. Ready to make $$$$$. OK Credit, Bad Credit, No Credit, WE WILL GET YOU FINANCED. Please call Adam at ( or...

Condition	Used
Usage	354,319 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
MLS Number	11909383
Category	Sleeper Semi Trucks
Last Updated	8/14/2024
Location	Selma, CA, US
Sold By	Selma Truck Sales

(844) 407-___ SHOW
NUMBERCall Seller

Featured Item

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2016 Freightliner Cascadia 125 Evolution Sleeper Semi Truck - 71" Mid Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$24,900 USD

2016 FREIGHTLINER CASCADIA 125 SLEEPER, DETROIT DD15 505HP, DETROIT DT12 12 SPEED AUTOMATIC, DEF DELETED, DOUBLE BUNK, Ready to work Call for more info,

Condition	Used
Usage	749,085 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
Sleeper Size	71"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	2106
MLS Number	12541554
Category	Sleeper Semi Trucks
Last Updated	8/14/2024
Location	LATHROP, CA, US
Sold By	DOT TRUCK SALES

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2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Amt

Recently Updated

$69,900 USD

LOW MILES FOR THE YEAR, 2020 FREIGHTLINER CASCADIA 126, ONLY 371,049 MILES, RAISED ROOF SLEEPER, THERMO KING DIESEL APU, POWER INVERTER, REFRIGERATOR, SUPER SINGLE TIRES, 505 HP DD15 DETROIT...

Condition	Used
Usage	371,049 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	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	LLKZ2481U-
MLS Number	13025986
Category	Sleeper Semi Trucks
Last Updated	8/17/2024
Location	Richmond, VA, US
Sold By	Truck Enterprises Inc.

34 1

2023 Kenworth T680 Sleeper Semi Truck - 76" Raised Roof Sleeper, Cummins 500HP, 12 Speed Autoshift Amt

Recently Updated

$145,900 USD

2023 KENWORTH T680 NEXT GEN, ONLY 127,068 MILES, STILL LIKE NEW, CUMMINS X15 500 HP MOTOR, EATON FULLER AUTOMATED TRANSMISSION, 2909 ENGINE HOURS, RAISED ROOF DOUBLE BUNK SLEEPER, ALL...

Condition	Used
Usage	127,068 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Autoshift Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	76"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.75 ratio
Stock Number	PJ235464U/MANA
MLS Number	12944111
Category	Sleeper Semi Trucks
Last Updated	8/17/2024
Location	Manassas, VA, US
Sold By	Truck Enterprises Inc.

(855) 300-___ SHOW
NUMBERCall Seller

17 0

2019 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Amt

Price Reduced

$52,300 USD

Selling a 2019 Freightliner Cascadia with 262,468 miles on it. This truck has a 505 HP Detroit DD15, Detroit DT12 transmission, 12,350 lb steer axle, and 40,000 lb drive axles with 2.28...

Condition	Used
Usage	262,468 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
Suspension	AirLiner
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	73685
MLS Number	12941286
Category	Sleeper Semi Trucks
Last Updated	8/17/2024
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

19 1

2023 Kenworth T680 Sleeper Semi Truck - 80" Raised Roof Sleeper, Cummins 500HP, 12 Speed Amt

Recently Updated

$135,000 USD

**FACTORY WARRANTY REMAINING!!! Exclusive opportunity on a gently used 2023 KW T680. CB Ready, AM/FM/BT/SAT Radio, Inverter, Webasto Heater are just a few of the amenities this truck has to...

Condition	Used
Usage	149,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	80"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	PJ263298U/MANA
MLS Number	12885946
Category	Sleeper Semi Trucks
Last Updated	8/17/2024
Location	Manassas, VA, US
Sold By	Truck Enterprises Inc.

(833) 368-___ SHOW
NUMBERCall Seller

15 1

2020 Peterbilt 579 Sleeper Semi Truck - 72" Mid Roof Sleeper, Cummins 500HP, 12 Speed Endurant Amt

Newly Listed

$59,999 USD

Condition	Used
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Mid Roof Sleeper
Sleeper Size	72"
Suspension	Leaf Springs
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	ULD656699
MLS Number	13055929
Category	Sleeper Semi Trucks
Last Updated	8/16/2024
Location	Fargo, ND, US
Sold By	Wallwork Truck Center

(844) 693-___ SHOW
NUMBERCall Seller

19 0

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

Newly Listed

$54,900 USD

Ready to hit the road and go to work! First Class 8 Truck Sales is a full-service dealer offering high quality equipment, premium financing options, and an excellent customer experience....

Condition	Used
Usage	483,113 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	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	229
MLS Number	13055703
Category	Sleeper Semi Trucks
Last Updated	8/16/2024
Location	Belvidere, IL, US
Sold By	First Class 8 Truck Sales

(877) 705-___ SHOW
NUMBERCall Seller

15 0

2022 Kenworth T680 Sleeper Semi Truck - 52" Mid Roof Sleeper, Cummins 500HP, 12 Speed Endurant Amt

Newly Listed

$69,900 USD

Qualifies for Fed Ex Service. Certified!! Certified!! KWS Certified Pre-Owned / 114-point Inspection / 1 year or 125,000 miles warranty included. Call for Details

Condition	Used
Usage	489,951 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15E
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Mid Roof Sleeper
Sleeper Size	52"
Suspension	AG 400L
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	NJ124321
MLS Number	13055553
Category	Sleeper Semi Trucks
Last Updated	8/17/2024
Location	Hagerstown, MD, US
Sold By	Truck Enterprises Inc.

(833) 970-___ SHOW
NUMBERCall Seller

15 0

2022 Kenworth T680 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 500HP, 12 Speed Autoshift Amt

Recently Updated

$69,900 USD

Clean sleeper. ready to work. Cummins power. Please look at pics and call Clearfield today to schedule a test drive

Condition	Used
Usage	10,483 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Autoshift Automated
Sleeper Type	Raised Roof Sleeper
Suspension	Air Glide
Rear Axle	Tandem Axle
Stock Number	272035
MLS Number	12726615
Category	Sleeper Semi Trucks
Last Updated	8/16/2024
Location	Millstone Township, NJ, US
Sold By	Hunter Truck

(844) 435-___ SHOW
NUMBERCall Seller

9 0

2024 International LT Sleeper Semi Truck

Price Reduced

$144,900 USD

Engine: CUMMINS, 500 HP, Fuel Type: Diesel, Drive: 6x4, Air Ride Suspension, Wheel Base: 230, Tandem Rear Axles, Front Axle Weight: 12350 lb, Rear Axle Weight: 40000 lb

Condition	New
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Drivetrain	6x4
Transmission	12 Speed
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.25 ratio
Stock Number	268774
MLS Number	12433377
Category	Sleeper Semi Trucks
Last Updated	8/16/2024
Location	Hartford, CT, US
Sold By	Allegiance Trucks

(833) 300-___ SHOW
NUMBERCall Seller

36 1

2023 Peterbilt 567 Sleeper Semi Truck - Paccar 510HP, 12 Speed Automatic

Newly Listed

Call for price

315898 Miles, Engine: PACCAR MX-13, 510 HP, Fuel Type: Diesel, 12 Speed Automatic Transmission, Drive: 6x4, Air Ride Suspension, Wheels: All Aluminum, Wheel Base: 228, Tandem Rear Axles,...

Condition	Used
Usage	315,898 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	510 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Automatic
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.58 ratio
Stock Number	C-35786
MLS Number	13051608
Category	Sleeper Semi Trucks
Last Updated	8/16/2024
Location	Champlain, NY, US
Sold By	Gamache Truck Center

28 0

2024 Kenworth T680 Sleeper Semi Truck - 76" Raised Roof Sleeper, Cummins 500HP, 12 Speed Endurant Amt

Recently Updated

$169,995 USD

Available now for immediate delivery! New Kenworth T680 with Cummins X15 Efficiency Series, 500 hp, 1,650 lb.ft., Eaton Endurant (EEO16F112C) 12-speed automated transmission, 12,350# front,...

Condition	New
Usage	250 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	76"
Suspension	AG 400L
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	KF347922
MLS Number	12885910
Category	Sleeper Semi Trucks
Last Updated	8/13/2024
Location	Fort Pierce, FL, US
Sold By	All Roads Trucks

29 0

2024 Kenworth T680 Sleeper Semi Truck - 76" Raised Roof Sleeper, Cummins 500HP, 12 Speed Endurant Amt

Recently Updated

$169,995 USD

Available now for immediate delivery. New 2024 Kenworth T680 with 76" raised roof sleeper, Cummins X15 Efficiency Series engine rated at 500 horsepower, Eaton Endurant 12-Speed automated...

Condition	New
Usage	250 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	Raised Roof Sleeper
Sleeper Size	76"
Suspension	AG 400
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	KF369772
MLS Number	12768701
Category	Sleeper Semi Trucks
Last Updated	8/13/2024
Location	Fort Lauderdale, FL, US
Sold By	All Roads Trucks

28 0

2024 Kenworth T680 Sleeper Semi Truck - 76" Raised Roof Sleeper, Cummins 500HP, 12 Speed Endurant Amt

$169,995 USD

Available now for immediate delivery! New Kenworth T680 with Cummins X15 Efficiency Series, 500 hp, 1,650 lb.ft., Eaton Endurant (EEO16F112C) 12-speed automated transmission, 12,350# front,...

Condition	New
Usage	250 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	76"
Suspension	AG 400L
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	KFJ347923
MLS Number	12885914
Category	Sleeper Semi Trucks
Last Updated	8/12/2024
Location	Fort Pierce, FL, US
Sold By	All Roads Trucks

24 0

2024 Kenworth T680 Sleeper Semi Truck - 76" Raised Roof Sleeper, Cummins 500HP, 12 Speed Endurant Amt

$169,995 USD

Available now for immediate delivery. New 2024 Kenworth T680 with 76" raised roof sleeper, Cummins X15 Efficiency Series engine rated at 500 horsepower, Eaton EEO16F112C Endurant 12-Speed...

Condition	New
Usage	250 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	Raised Roof Sleeper
Sleeper Size	76"
Suspension	AG 400
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.64 ratio
Stock Number	KF360365
MLS Number	12768696
Category	Sleeper Semi Trucks
Last Updated	8/12/2024
Location	Fort Lauderdale, FL, US
Sold By	All Roads Trucks

(877) 841-___ SHOW
NUMBERCall Seller

1 0

2020 Freightliner Cascadia 125 Sleeper Semi Truck - Detroit 505HP, 12 Speed Automatic

$52,800 USD

NAP $7,120.00 Total Due - 30 DAYS NO PAYMENT - EASY APPROVAL! FreedomWay Trucks offers a program that bypasses traditional requirements to truck ownership with NO CREDIT CHECK. We call it...

Condition	Used
Usage	438,349 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Automatic
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	3.08 ratio
Stock Number	5609
MLS Number	13042987
Category	Sleeper Semi Trucks
Last Updated	8/10/2024
Location	Gulfport, MS, US
Sold By	FreedomWay Trucks

34 1

2023 Kenworth T680 Sleeper Semi Truck - 76" Raised Roof Sleeper, Cummins 500HP, 12 Speed Endurant Amt

$145,900 USD

SAVE THOUSANDS OVER NEW!! 2023 KENWORTH T680 NEXT GEN, ONLY 127,068 MILES, STILL LIKE NEW, CUMMINS X15 500 HP MOTOR, EATON FULLER AUTOMATED TRANSMISSION, 2909 ENGINE HOURS, RAISED ROOF...

Condition	Used
Usage	127,068 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	Raised Roof Sleeper
Sleeper Size	76"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.75 ratio
Stock Number	PJ235464U-
MLS Number	12945915
Category	Sleeper Semi Trucks
Last Updated	8/17/2024
Location	Richmond, VA, US
Sold By	Truck Enterprises Inc.

19 1

2023 Kenworth T680 Sleeper Semi Truck - 80" Raised Roof Sleeper, Cummins 500HP, 12 Speed Amt

$129,900 USD

**SAVE THOUSANDS OVER NEW** LOTS OF FACTORY WARRANTY REMAINING!! Exclusive opportunity on a gently used 2023 KW T680. CB Ready, AM/FM/BT/SAT Radio, Inverter, Webasto Heater are just a few...

Condition	Used
Usage	149,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	80"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	PJ263298U-
MLS Number	12873820
Category	Sleeper Semi Trucks
Last Updated	8/17/2024
Location	Richmond, VA, US
Sold By	Truck Enterprises Inc.