Used Diesel 12 Speed Trucks with Detroit Engines For Sale

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2019 Freightliner Cascadia 126 Roll Off Truck - Detroit, 450HP, 12 Speed Dt12 Automatic

Newly Listed

$100,000 USD

357548 Miles, Engine: DETROIT DD13, 450 HP, Fuel Type: Diesel, 12 Speed DT12 Automatic Transmission, Drive: 6x4, Tandem Rear Axles

Condition	Used
Usage	357,548 Miles
Duty Class	Heavy Duty Roll Off Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Rear Axle	Tandem Axle
Stock Number	L19329
MLS Number	14450801
Category	Roll Off Trucks
Last Updated	6/25/2026
Location	North Las Vegas, NV, US
Sold By	TCI Transportation

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

Newly Listed

$39,900 USD

656k Miles, DT12 Auto, Detroit DD15, 455 HP, Adaptive Cruise, Lane Departure Warning, Tire Pressure Warning System, Fleet Maintained, Several Available, Clean Units, Super Singles - can...

Condition	Used
Usage	656,416 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Raised Roof Sleeper
Rear Axle	Tandem Axle
Stock Number	KP8053
MLS Number	14450711
Category	Sleeper Semi Trucks
Last Updated	6/25/2026
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 400HP, 12 Speed Dt12 Amt

Newly Listed

$40,000 USD

714,510 Miles, DD15 Detroit, 400 HP, DT12 Automated, 2.16 Ratio, 226" WB, 12500# Fronts, 40,000# Rears, Double Bunk Sleeper, Bluetooth, Inter-Axle Lock, Air Suspension Dump, Air Slide 5th...

Condition	Used
Usage	714,510 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	400 HP
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	2.16 ratio
Stock Number	MA9678
MLS Number	14450710
Category	Sleeper Semi Trucks
Last Updated	6/25/2026
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

2022 Freightliner Cascadia 126 Sleeper Semi Truck - Detroit 455HP, 12 Speed Dt12 Automatic

Recently Updated

$79,995 USD

2022 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 403k MILES, READY TO WORK FINANCING AVAILABLE FOR ALL CREDIT TYPES, ZERO DOWN AVAILABLE ON APPROVED...

Condition	Used
Usage	403 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Rear Axle	Tandem Axle
Stock Number	1875
MLS Number	14432057
Category	Sleeper Semi Trucks
Last Updated	6/25/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

(888) 853-___ SHOW
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2020 Freightliner Cascadia 126 Day Cab Truck - Detroit 435HP, 12 Speed Dt12 Amt

Price Drop $41,900 USD

2020 Freightliner Cascadia 126, Detroit DD13 435 hp, Detroit DT12 12 speed auto overdrive transmission, 178" WB, 3.08 rear axle ratio, fender mirrors, A/S 5th wheel, dual 80 gallon fuel...

Condition	Used
Usage	12,021 Hours
Duty Class	Heavy Duty Day Cab Truck
Horse Power	435 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	813
MLS Number	14397604
Category	Day Cab Semi Trucks
Last Updated	6/25/2026
Location	New Salem, ND, US
Sold By	Pedigree Truck and Trailer Sales, Inc.

(833) 478-___ SHOW
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2021 Freightliner Cascadia 126 Day Cab Truck - Detroit 450HP, 12 Speed Dt12 Automatic

Recently Updated

$50,495 USD

LEASE MAINTAINED TRUCK, ,LOW MILES, DET 450HP, DT 12 AUTOMATIC, SUPER CLEAN, BRAND NEW VIRGIN GOODYEARS, NEW BRAKES AND DRUMS

Condition	Used
Usage	334,407 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.41 ratio
Stock Number	7322
MLS Number	14358547
Category	Day Cab Semi Trucks
Last Updated	6/25/2026
Location	Palmetto, GA, US
Sold By	7E Truck Sales, LLC

(855) 981-___ SHOW
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2020 Freightliner Cascadia 116 Day Cab Truck - Detroit 450HP, 12 Speed Dt12 Amt

Recently Updated

$37,900 USD

2020 Freightliner Cascadia 116 Day Cab **New Virgin Dual Tires or Super Single tires available on all trucks Trucks are currently on wide base tires but can be swapped to new dual Virgin...

Condition	Used
Usage	287,170 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	TNF201028 Web
MLS Number	14269080
Category	Day Cab Semi Trucks
Last Updated	6/25/2026
Location	Ontario, CA, US
Sold By	Nationwide Haul

2019 Freightliner Cascadia 126 Sleeper Semi Truck - Detroit, 12 Speed Dt12 Amt

Recently Updated

$39,900 USD

656k Miles, DT12 Auto, Detroit DD15, 455 HP, Adaptive Cruise, Lane Departure Warning, Tire Pressure Warning System, Fleet Maintained, Several Available, Clean Units, Super Singles - can...

Condition	Used
Usage	656,416 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Raised Roof Sleeper
Rear Axle	Tandem Axle
Stock Number	KP8053
MLS Number	14080364
Category	Sleeper Semi Trucks
Last Updated	6/25/2026
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

(844) 624-___ SHOW
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2018 Freightliner Cascadia 126 Sleeper Semi Truck - 76" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

Newly Listed

$42,950 USD

FOR SALE – 2018 FREIGHTLINER CASCADIA 126 SLEEPER Built for today's freight market, this 2018 Freightliner Cascadia 126 Sleeper is designed to deliver the combination of fuel efficiency,...

Condition	Used
Usage	659,948 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	76"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	STKFRT
MLS Number	14447405
Category	Sleeper Semi Trucks
Last Updated	6/24/2026
Location	Commerce City, CO, US
Sold By	Michelle Sells Trucks

(844) 624-___ SHOW
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2018 Freightliner Cascadia 126 Sleeper Semi Truck - 76" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

Newly Listed

$42,950 USD

FOR SALE – 2018 FREIGHTLINER CASCADIA 126 SLEEPER Built for today's freight market, this 2018 Freightliner Cascadia 126 Sleeper is designed to deliver the combination of fuel efficiency,...

Condition	Used
Usage	659,948 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	76"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	STKFRT
MLS Number	14447401
Category	Sleeper Semi Trucks
Last Updated	6/24/2026
Location	Commerce City, CO, US
Sold By	Michelle Sells Trucks

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2020 Freightliner Cascadia 126 Day Cab Truck - Detroit 450HP, 12 Speed Dt12 Automatic

Price Drop $42,900 USD

Low mile day cabs available, Multiple units, One owner Contact Ed Gibbs,

Condition	Used
Usage	292,000 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
MLS Number	14422345
Category	Day Cab Semi Trucks
Last Updated	6/24/2026
Location	Phoenix, AZ, US
Sold By	TCI Transportation

(855) 910-___ SHOW
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2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Amt

Recently Updated

$57,950 USD

N.A.P. New Style Cascadia, Air Release 5th Wheel, Sliding 5th Wheel, Automatic Transmission, Espar Bunk Heater, 1500-Watt invertor, Refrigerator, TV Mounting Bracket, Opti Idle, Detroit...

Condition	Used
Usage	476,588 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 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 2.41 ratio
Stock Number	3648
MLS Number	14395122
Category	Sleeper Semi Trucks
Last Updated	6/24/2026
Location	GRANGER, IA, US
Sold By	Barr-Nunn Transportation LLC

2018 Freightliner Cascadia 126 Sleeper Semi Truck - Detroit, 12 Speed Dt12 Amt

Recently Updated

$36,000 USD

AUTOMATIC. ELECTRONIC STABILITY CONTROL, BRAKE ASSIST, ADAPTIVE CRUISE CONTROL, LANE DEPARTURE WARNING, TIRE PRESSURE MONITORIING SYSTEM

Condition	Used
Usage	650,536 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Rear Axle	Tandem Axle
Stock Number	KA5243
MLS Number	14080356
Category	Sleeper Semi Trucks
Last Updated	6/24/2026
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

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

Price Drop $42,500 USD

Several Available!, Full 128 Point Inspection, 663,776 Miles, DD15 Detroit, 455 HP, DT12 HD Automated, Double Bunk Condo, Electric APU, Super Singles - can switch out for duals, Fleet...

Condition	Used
Usage	663,776 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 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	40,000 lb 3.08 ratio
Stock Number	LY5973
MLS Number	13916428
Category	Sleeper Semi Trucks
Last Updated	6/24/2026
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

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2022 Freightliner Cascadia 126 Sleeper Semi Truck - 70" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

Recently Updated

$69,900 USD

The 2022 Freightliner Cascadia 126 is a popular Class 8 highway tractor in the used truck market, prized for its powerful Detroit diesel engine options, aerodynamic efficiency, and modern...

Condition	Used
Usage	512,652 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	70"
Suspension	Air Ride
Rear Axle	Tandem Axle
Stock Number	2626
MLS Number	13703252
Category	Sleeper Semi Trucks
Last Updated	6/25/2026
Location	Los Angeles, CA, US
Sold By	TCI Transportation

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

Newly Listed

$58,995 USD

2021 FREIGHTLINER CASCADIA 126, WALMART SPECS, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 579,00K MILES, DIESEL APU, FLEET MAINTAINED, LOADED TRUCKS MULTIPLE WALMART UNITS...

Condition	Used
Usage	579 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Rear Axle	Tandem Axle
Stock Number	8277
MLS Number	14444948
Category	Sleeper Semi Trucks
Last Updated	6/23/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

(855) 807-___ SHOW
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2022 Freightliner Cascadia 116 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 450HP, 12 Speed Dt12 Automatic

Newly Listed

$79,500 USD

FLEET MAINTAINED 2022 FREIGHTLINER CASCADIA 113, DETROIT DD13, 450HP, 12 SPEED DETROIT DT12 TRANSMISSION, 72" SLEEPER, JAKES, LOCKERS, ALUMINUM RIMS, NO CODES OR FAULTS, 200 GAL FUEL TANKS,...

Condition	Used
Usage	315,012 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	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	7319
MLS Number	14444729
Category	Sleeper Semi Trucks
Last Updated	6/23/2026
Location	Houston, TX, US
Sold By	Southern Truck Sales Ltd

(855) 807-___ SHOW
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2022 Freightliner Cascadia 116 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 450HP, 12 Speed Dt12 Automatic

Newly Listed

$54,500 USD

FLEET MAINTAINED 2022 FREIGHTLINER CASCADIA 113, DETROIT DD13, 450HP, 12 SPEED DETROIT DT12 TRANSMISSION, 72" SLEEPER, JAKES, LOCKERS, ALUMINUM RIMS, NO CODES OR FAULTS, 200 GAL FUEL TANKS,...

Condition	Used
Usage	500,141 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	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	7321
MLS Number	14444718
Category	Sleeper Semi Trucks
Last Updated	6/23/2026
Location	Houston, TX, US
Sold By	Southern Truck Sales Ltd

(855) 807-___ SHOW
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2022 Freightliner Cascadia 116 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 450HP, 12 Speed Dt12 Automatic

Newly Listed

$54,500 USD

FLEET MAINTAINED 2022 FREIGHTLINER CASCADIA 113, DETROIT DD13, 450HP, 12 SPEED DETROIT DT12 TRANSMISSION, 72" SLEEPER, JAKES, LOCKERS, ALUMINUM RIMS, NO CODES OR FAULTS, 200 GAL FUEL TANKS,...

Condition	Used
Usage	516,311 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	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	7320
MLS Number	14444716
Category	Sleeper Semi Trucks
Last Updated	6/23/2026
Location	Houston, TX, US
Sold By	Southern Truck Sales Ltd

2019 Freightliner Cascadia 126 Sleeper Semi Truck - Detroit, 12 Speed Dt12 Amt

Recently Updated

$36,000 USD

663k Miles, Detroit DD15, 455 HP, DT12 Automated, Double Bunk Condo, Electronic Stability Control, Adaptive Cruise Lane Departure Warning, Tire Pressure Monitoring System, Super Singles -...

Condition	Used
Usage	663,776 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 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	40,000 lb
Stock Number	KP8083
MLS Number	14080367
Category	Sleeper Semi Trucks
Last Updated	6/23/2026
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

2019 Freightliner Cascadia 126 Sleeper Semi Truck - Detroit, 12 Speed Dt12 Amt

Recently Updated

$35,900 USD

AUTOMATIC. ELECTRONIC STABILITY CONTROL, BRAKE ASSIST, ADAPTIVE CRUISE CONTROL, LANE DEPARTURE WARNING, TIRE PRESSURE MONITORIING SYSTEM

Condition	Used
Usage	655,827 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Rear Axle	Tandem Axle
Stock Number	KP8071
MLS Number	14080366
Category	Sleeper Semi Trucks
Last Updated	6/23/2026
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

(833) 657-___ SHOW
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2024 Western Star 49X Sleeper Semi Truck

Price Drop $122,900 USD

Truck is in like new condition, factory EW4 warranty 5 years or 500000 miles, new tires

Warranty

Condition	Used
Usage	128,527 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Engine Model	Detroit Dd15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	4 Bag Air Ride
Rear Axle	Tandem Axle
MLS Number	14068963
Category	Sleeper Semi Trucks
Last Updated	6/22/2026
Location	Blue Island, IL, US
Sold By	DMC Logistics

2022 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

Recently Updated

$85,995 USD

FINANCING AVAILABLE FOR ALL CREDIT TYPES, ZERO DOWN AVAILABLE ON APPROVED CREDIT, FIRST TIME BUYERS WELCOME, EXTENDED WARRANTIES AVAILABLE, TRADE INS WELCOME, NATIONWIDE DELIVERY AVAILABLE...

Condition	Used
Usage	339,000 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	2016
MLS Number	14422359
Category	Sleeper Semi Trucks
Last Updated	6/21/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

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

Newly Listed

$56,995 USD

2021 FREIGHTLINER CASCADIA 126, WALMART SPECS, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 593,00K MILES, DIESEL APU, FLEET MAINTAINED, LOADED TRUCKS MULTIPLE WALMART UNITS...

Condition	Used
Usage	593 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Rear Axle	Tandem Axle
Stock Number	8232
MLS Number	14442172
Category	Sleeper Semi Trucks
Last Updated	6/20/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet