Used 12 Speed Sleeper Semi Trucks For Sale

4 0

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

Recently Updated

$49,900 USD

72 Inch Mid-Roof XT Sleeper, 556,000 Approximate Miles, ECM Reads 556,000 Miles, Detroit DD15 Engine, 505 H.P., Engine Brake, DT12 Transmission, (Automatic), 40,000 Lb. Rear Ends, 3.08 Ratio...

Condition	Used
Usage	556,000 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	Mid Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	LJ3610
MLS Number	13712680
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

(833) 986-___ SHOW
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29 0

2023 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP

Recently Updated

$104,900 USD

2023 Freightliner New Cascadia sleeper, Detroit DD15 engine, DT12 transmission, bunk heater, new virgin drive tires, Pm and Dot performed, ready to go to work. Emission systems warranty...

Condition	Used
Usage	296,001 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	263893
MLS Number	13683504
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Tampa, FL, US
Sold By	Southport Truck Group

(833) 986-___ SHOW
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29 0

2023 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP

Recently Updated

$119,900 USD

Super nice Truck!! Detroit DD15 and Detroit transmission, EXT DETROIT EW4 CARB COMPLIANT COVERAGE 60 Months 10/14/Miles,

Condition	Used
Usage	292,564 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	263320
MLS Number	13586876
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Tampa, FL, US
Sold By	Southport Truck Group

23 0

2019 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$41,500 USD

Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing; extended warranties;...

Condition	Used
Usage	653,018 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	206217
MLS Number	13687297
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Parkersburg, WV, US
Sold By	Penske Used Trucks

(855) 591-___ SHOW
NUMBERCall Seller

35 0

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

Newly Listed

$53,900 USD

2021 Freightliner Cascadia 126 – Fleet Maintained New Body Style Cascadia 126!, This is one clean truck—freshly driven back from Texas! , 505 HP Detroit DD15 engine, , Detroit DT12 automatic...

Condition	Used
Usage	523,372 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	Air Ride
Rear Axle	Tandem Axle
Rear End	2.85 ratio
Stock Number	ME7576
MLS Number	13736793
Category	Sleeper Semi Trucks
Last Updated	8/1/2025
Location	Byron Center, MI, US
Sold By	5 Star Truck Sales, Inc

23 0

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$87,250 USD

Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing; extended warranties;...

Condition	Used
Usage	388,097 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.23 ratio
Stock Number	457247
MLS Number	13538052
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Kansas City, MO, US
Sold By	Penske Used Trucks

23 0

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$74,750 USD

SPECIAL PROMOTION - Original Price: $79750.00 Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We...

Condition	Used
Usage	456,836 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	390273
MLS Number	13582250
Category	Sleeper Semi Trucks
Last Updated	8/1/2025
Location	Norcross, GA, US
Sold By	Penske Used Trucks

4 0

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

Recently Updated

$48,900 USD

72 Inch Mid-Roof XT Sleeper, 573,000 Approximate Miles, ECM Reads 573,000 Miles, Detroit DD15 Engine, 505 H.P., Engine Brake, DT12 Transmission, (Automatic), 40,000 Lb. Rear Ends, 3.08 Ratio...

Condition	Used
Usage	573,000 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	Mid Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	LJ3604
MLS Number	13712674
Category	Sleeper Semi Trucks
Last Updated	8/1/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

25 0

2020 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$57,500 USD

Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing; extended warranties;...

Condition	Used
Usage	440,561 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	364141
MLS Number	13677476
Category	Sleeper Semi Trucks
Last Updated	8/3/2025
Location	Brook Park, OH, US
Sold By	Penske Used Trucks

23 0

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$64,250 USD

Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing; extended warranties;...

Condition	Used
Usage	512,903 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	360747
MLS Number	13619391
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Greensboro, NC, US
Sold By	Penske Used Trucks

25 1

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, Automatic

Recently Updated

$58,900 USD

Fleet Maintained, Stock MA9710, Miles 465,201, Detroit DD15, 505 HP, DT 12 Automatic, Refrigerator, New mattress, 2.85 Ratio, 225" WB, Dual Air Ride Seats, Double Bunk, Power Windows/Mirrors...

Condition	Used
Usage	465,201 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 2.85 ratio
Stock Number	MA9710
MLS Number	12701832
Category	Sleeper Semi Trucks
Last Updated	8/1/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

(844) 693-___ SHOW
NUMBERCall Seller

19 0

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

Newly Listed

$54,950 USD

First Class 8 Truck Sales is a full-service dealer offering high quality equipment, premium financing options, and an excellent customer experience. Call, click, or stop by and visit us...

Condition	Used
Usage	626,569 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 2.85 ratio
Stock Number	370
MLS Number	13734411
Category	Sleeper Semi Trucks
Last Updated	7/31/2025
Location	Belvidere, IL, US
Sold By	First Class 8 Truck Sales

(844) 900-___ SHOW
NUMBERCall Seller

45 1

2020 Western Star 5700XE Sleeper Semi Truck - 68" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

Recently Updated

$34,900 USD

*** ASK FOR LOW COST DELIVERY AVAILABLE TO ALL 48 STATES!! *** DT12 SPEED!!! DEF, ENGINE BRAKE, MINI FRIDGE, TRAILER BRAKE, Se Habla Español! NO CREDIT? BAD CREDIT? NO PROBLEM!! OPEN 7 DAYS...

Condition	Used
Usage	763,843 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	68"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.85 ratio
Stock Number	B03674-DELIVERY 2 U
MLS Number	13672535
Category	Sleeper Semi Trucks
Last Updated	7/31/2025
Location	Bakersfield, CA, US
Sold By	Diamond Truck Sales Inc

44 4

2020 Kenworth T680 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 500HP, 12 Speed Automatic

Recently Updated

$59,900 USD

430,353 Miles, Cummins X15 Engine, 500 H.P Engine Brake, Endurant Automatic - 12 Speed, Fleet Maintained, Navigation, Virgin Rubber, Fridge, 76" Condo Sleeper with Workstation Upper Bunk,...

Condition	Used
Usage	430,353 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 2.79 ratio
Stock Number	417831
MLS Number	13603401
Category	Sleeper Semi Trucks
Last Updated	7/31/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

(844) 385-___ SHOW
NUMBERCall Seller

10 0

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 70" Condo Sleeper, 505HP, 12 Speed Automatic

Price Drop

$36,209 USD

*Nothing displayed on this site is an offer to sell approval or commitment to sell or guaranty of availability. Actual vehicle descriptions including mileage and age and offer price are...

Condition	Used
Usage	798,606 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15 GHG'17 505/1625
Transmission	12 Speed Automatic
Sleeper Type	Condo Sleeper
Sleeper Size	70"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.85 ratio
Stock Number	273991
MLS Number	13726003
Category	Sleeper Semi Trucks
Last Updated	7/31/2025
Location	Kansas City, MO, US
Sold By	Ryder

23 0

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$85,750 USD

Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing; extended warranties;...

Condition	Used
Usage	465,859 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	421689
MLS Number	13486829
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Salt Lake City, UT, US
Sold By	Penske Used Trucks

23 0

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$97,500 USD

Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing; extended warranties;...

Condition	Used
Usage	363,409 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	421688
MLS Number	13531644
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Ontario, CA, US
Sold By	Penske Used Trucks

24 0

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Price Drop

$67,250 USD

Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing; extended warranties;...

Condition	Used
Usage	550,323 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	422291
MLS Number	13603835
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	East Chicago, IN, US
Sold By	Penske Used Trucks

24 0

2022 Freightliner T12664ST Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$66,000 USD

Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing; extended warranties;...

Condition	Used
Usage	582,680 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	406818
MLS Number	12786393
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Chattanooga, TN, US
Sold By	Penske Used Trucks

23 0

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$57,000 USD

MANAGERS SPECIAL Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing;...

Condition	Used
Usage	707,505 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	390318
MLS Number	13387339
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Ontario, CA, US
Sold By	Penske Used Trucks

(833) 986-___ SHOW
NUMBERCall Seller

27 0

2024 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP

Newly Listed

$79,900 USD

466874 Miles, Engine: DETROIT DD15, 505 HP, Fuel Type: Diesel, Drive: 6x4, 4 Bag Air Ride Suspension, Sleeper Type: Raised Roof Sleeper, Sleeper Size: 72, Wheels: Aluminum, Wheel Base: 239,...

Condition	Used
Usage	466,874 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	4 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	264339
MLS Number	13730246
Category	Sleeper Semi Trucks
Last Updated	8/2/2025
Location	Tampa, FL, US
Sold By	Southport Truck Group

(833) 932-___ SHOW
NUMBERCall Seller

12 0

2016 Mack Pinnacle CXU613 Sleeper Semi Truck - Mid Roof Sleeper, Detroit 505HP, 12 Speed I Shift Automatic

Newly Listed

Call for price

750458 Miles, Engine: DETROIT DD13, 505 HP, 12 Speed I Shift Automatic Transmission, Air Ride Suspension, Sleeper Type: Mid Roof Sleeper, Wheels: Aluminum, Rear Axle Weight: 40000 lb

Condition	Used
Usage	750,458 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD13
Transmission	12 Speed I Shift Automatic
Sleeper Type	Mid Roof Sleeper
Suspension	Air Ride
Rear End	40,000 lb
Stock Number	83659
MLS Number	13730226
Category	Sleeper Semi Trucks
Last Updated	7/30/2025
Location	Bangor, ME, US
Sold By	Freightliner of Maine

23 0

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$56,750 USD

Purchase your vehicle from the leader in the leasing industry. Penske vehicles have the reputation of quality and being well-maintained. We offer competitive financing; extended warranties;...

Condition	Used
Usage	629,926 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	360740
MLS Number	13148895
Category	Sleeper Semi Trucks
Last Updated	7/30/2025
Location	Grand Prairie, TX, US
Sold By	Penske Used Trucks

(855) 489-___ SHOW
NUMBERCall Seller

43 0

2021 Peterbilt 567 Sleeper Semi Truck - 80" Mid Roof Sleeper, Paccar 510HP, 12 Speed Endurant Automatic

Recently Updated

$59,000 USD

Includes 6 Month/50,000 mile Engine and After Treatment warranty, 510 hp, Endurant Transmission, Disc Brakes, Navigation, Refrigerator, Espar Bunk Heater, Aluminum 5th Wheel, Merritt Tool...

Condition	Used
Usage	567,666 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	510 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Sleeper Type	Mid Roof Sleeper
Sleeper Size	80"
Suspension	Air Ride
Rear Axle	Tandem Axle
Stock Number	2081
MLS Number	13627318
Category	Sleeper Semi Trucks
Last Updated	7/30/2025
Location	Rhome, TX, US
Sold By	Jordan Truck Sales of Texas, LLC