12 Speed Trucks with Cummins Engines For Sale

29 1

2019 Peterbilt 579 Sleeper Semi Truck - 72" Raised Roof Sleeper, Cummins 500HP, 12 Speed Endurant Automatic

Price Drop

$34,900 USD

671,000 Miles, Cummins X15 Engine, 500 H.P., Engine Brake, EEO-18F112C12 Transmission, (Automatic), 72 Inch Unibilt High Roof Sleeper, Upper Bunk, 40,000 Lb. Rear Ends, 2.79 Ratio, Low Air...

Condition	Used
Usage	671,000 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	Mid Roof Sleeper
Sleeper Size	72"
Suspension	Pete Low Air Leaf
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	618272
MLS Number	13603412
Category	Sleeper Semi Trucks
Last Updated	6/28/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

29 1

2020 Kenworth T680 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, 12 Speed Automatic

Recently Updated

$47,900 USD

Se habla español, 540k Miles, Many Available!, X15 – 450HP, 12 Speed Eaton Auto, Double bunk Condo, Aluminum wheels, Battery APU, Nice Rubber, Air Slide 5th Wheel, ParkSmart APU, Workstation...

Condition	Used
Usage	540,870 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	399372
MLS Number	13601260
Category	Sleeper Semi Trucks
Last Updated	6/28/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

(844) 624-___ SHOW
NUMBERCall Seller

19 2

2023 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Cummins 500HP, 12 Speed Automatic

Recently Updated

$124,950 USD

2023 FREIGHTLINER CASCADIA 126 – 500HP CUMMINS + DINETTE + APU, Only 185,637 miles – Located in Commerce City, CO This clean Cascadia is powered by a 500HP Cummins X15 and Eaton 12-speed...

Condition	Used
Usage	5,395 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant 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	CO10375
MLS Number	13601225
Category	Sleeper Semi Trucks
Last Updated	7/1/2025
Location	Commerce City, CO, US
Sold By	Michelle Sells Trucks

37 2

2019 Peterbilt 579 Sleeper Semi Truck - Cummins 450HP, Automatic

Price Drop

$39,900 USD

80 Inch Ultra-Loft Sleeper, Upper Bunk, 591,000 Approximate Miles,, ECM Reads 591,000 Miles, Cummins X15 Engine, 450 H.P Engine Brakes, EEO-18F112C12 Transmission, (Automatic), 40,000 Lb....

Condition	Used
Usage	591,500 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	80"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	38,000 lb 2.79 ratio
Stock Number	633380
MLS Number	13586583
Category	Sleeper Semi Trucks
Last Updated	6/28/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

23 1

2020 Kenworth T680 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, 12 Speed Automatic

Price Drop

$47,900 USD

530,201 Miles, X15 – 450HP, 12 Speed Endurant Automatic, Double bunk, Aluminum wheels, Collision Mitigation System, Battery APU, Jakes, 2.79 Ratio, Disc Brakes, Aluminum Wheels, Air Slide...

Condition	Used
Usage	530,201 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	399376
MLS Number	13586522
Category	Sleeper Semi Trucks
Last Updated	6/28/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

(844) 624-___ SHOW
NUMBERCall Seller

24 1

2021 Kenworth T680 Sleeper Semi Truck - Mid Roof Sleeper, Cummins 450HP, 12 Speed Endurant Amt

Recently Updated

$64,950 USD

Experience the perfect blend of comfort, power, and efficiency with this 2021 Kenworth T680 Mid Roof Sleeper Truck. With 439,906 miles, this stunning maroon truck is ready to tackle long...

Condition	Used
Usage	13,072 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant 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	MO10262
MLS Number	13537360
Category	Sleeper Semi Trucks
Last Updated	6/28/2025
Location	Kansas City, MO, US
Sold By	Michelle Sells Trucks

(855) 489-___ SHOW
NUMBERCall Seller

40 0

2021 Kenworth T880 Day Cab Truck - Cummins 450HP, 12 Speed Endurant Automatic

Price Drop

$62,000 USD

Cummins 450 hp, Endurant 12 speed, 8 bag air ride, Includes 6 MO/50,000 mile Engine and After Treatment Warranty, Fort Worth, TX, Rhome, TX,

Condition	Used
Usage	365,850 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	3.25 ratio
Stock Number	2037
MLS Number	13543522
Category	Day Cab Semi Trucks
Last Updated	6/28/2025
Location	Rhome, TX, US
Sold By	Jordan Truck Sales of Texas, LLC

(844) 955-___ SHOW
NUMBERCall Seller

14 1

2020 Kenworth T880 Tri Axle Flatbed Truck - 485HP, 12 Speed Automatic

Price Drop

$139,750 USD

Only 98,000 Original Miles ~ Cummins X15 ~ 485 HP ~ 12 Speed Automatic ~ 20k Front / 20k Pusher / 46k Rears ~ Full Lockers ~ Triple Frame ~ Disc Brakes ~ 25ft x 102in Flatbed ~ All Aluminum...

Condition	Used
Usage	98,000 Miles
Duty Class	Heavy Duty Flatbed Truck
Horse Power	485 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	46,000 lb 3.91 ratio
Stock Number	397557
MLS Number	13152998
Category	Flatbed Trucks
Last Updated	6/28/2025
Location	Olive Branch, MS, US
Sold By	Truck Market

(844) 900-___ SHOW
NUMBERCall Seller

39 1

2021 International LT Sleeper Semi Truck - 68" Raised Roof Sleeper, Cummins 450HP, Automatic

Recently Updated

$42,900 USD

*** ASK FOR LOW COST DELIVERY AVAILABLE TO ALL 48 STATES!! *** AUTOMATIC!!! DEF, ENGINE BRAKE, SLIDING 5TH WHEEL, DEF, TRAILER BRAKE, SUSPENSION AIR DUMP Se Habla Español! NO CREDIT? BAD...

Condition	Used
Usage	514,310 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	68"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	B03341-DELIVERY 2 U
MLS Number	13352803
Category	Sleeper Semi Trucks
Last Updated	6/28/2025
Location	Bakersfield, CA, US
Sold By	Diamond Truck Sales Inc

18 0

2019 International LT625 Day Cab Truck - Cummins 450HP, 12 Speed Automatic

Recently Updated

$32,500 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	382,529 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	450 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Sleeper Size	0"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	51928
MLS Number	13293732
Category	Day Cab Semi Trucks
Last Updated	6/28/2025
Location	Comstock Park, MI, US
Sold By	Penske Used Trucks

(866) 530-___ SHOW
NUMBERCall Seller

1 0

2020 Kenworth T680 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 450HP, 12 Speed Endurant Automatic

Newly Listed

$53,995 USD

FINANCING AVAILABLE, EXTENDED WARRANTIES AVAILABLE TRADE INS WELCOME, NATIONWIDE DELIVERY AVAILABLE, WE CAN TAKE APPLICATIONS OVER THE PHONE OR ONLINE CALL/TEXT US TODAY FOR MORE...

Condition	Used
Usage	562,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	8537
MLS Number	13672990
Category	Sleeper Semi Trucks
Last Updated	6/27/2025
Location	Fontana, CA, US
Sold By	Fontana Truck Center

(844) 823-___ SHOW
NUMBERCall Seller

33 0

2021 International LT625 Sleeper Semi Truck - 73" Raised Roof Sleeper, Cummins 400HP, 12 Speed

Newly Listed

$60,000 USD

Worry-Free Program AVAILABLE � 1 OR 2-Year Factory-Backed Engine Aftertreatment Warranty + Extended Vehicle Coverage Preventive Maintenance Service AVAILABLE. $0 Deductible. No Claim...

Inspection Report

Condition	Used
Usage	451,618 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	400 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	73"
Suspension	Air Ride
Rear End	20,000 lb 2.85 ratio
Stock Number	503118
MLS Number	13670983
Category	Sleeper Semi Trucks
Last Updated	7/2/2025
Location	Shreveport, LA, US
Sold By	International Motors, LLC

(844) 624-___ SHOW
NUMBERCall Seller

20 0

2023 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Cummins 450HP, 12 Speed Automatic

Price Drop

$89,950 USD

This 2023 Cascadia comes equipped with a Cummins X15 engine delivering 455 HP and paired with a Detroit DT12 12-speed automated transmission. With only 370,537 miles and 6,933 engine hours,...

Condition	Used
Usage	6,933 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
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	CO10374
MLS Number	13599825
Category	Sleeper Semi Trucks
Last Updated	6/28/2025
Location	Oklahoma City, OK, US
Sold By	Michelle Sells Trucks

23 0

2019 International LT625 Sleeper Semi Truck - 73" Integral Sleeper, Cummins 450HP, 12 Speed Automatic

Recently Updated

$58,750 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	378,395 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	73"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	332438
MLS Number	13568194
Category	Sleeper Semi Trucks
Last Updated	7/3/2025
Location	Greeley, CO, US
Sold By	Penske Used Trucks

(855) 717-___ SHOW
NUMBERCall Seller

42 1

2020 Kenworth T680 Sleeper Semi Truck - 60" Mid Roof Sleeper, Cummins 400HP, 12 Speed Automatic

Recently Updated

$52,900 USD

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

Condition	Used
Usage	508,951 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Automatic
Sleeper Type	Mid Roof Sleeper
Sleeper Size	60"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.79 ratio
Stock Number	N14870-DELIVERY 2 U
MLS Number	13425692
Category	Sleeper Semi Trucks
Last Updated	6/27/2025
Location	Turlock, CA, US
Sold By	Diamond Truck Sales Inc

(855) 717-___ SHOW
NUMBERCall Seller

44 1

2021 International LT Sleeper Semi Truck - 72" Raised Roof Sleeper, Cummins 450HP, 12 Speed Automatic

Recently Updated

$44,900 USD

*** ASK FOR LOW COST DELIVERY AVAILABLE TO ALL 48 STATES!! ***, AUTOMATIC 12SPD!!! DEF, DIESEL, VIRGIN TIRES, FULL FAIRINGS, ENGINE BRAKES, 450HP!!! Se Habla Español! NO CREDIT? BAD CREDIT?...

Condition	Used
Usage	521,809 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Stock Number	N14789-DELIVERY 2 U
MLS Number	13327358
Category	Sleeper Semi Trucks
Last Updated	6/27/2025
Location	Turlock, CA, US
Sold By	Diamond Truck Sales Inc

(844) 912-___ SHOW
NUMBERCall Seller

53 1

2020 Kenworth T680 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 400HP, 12 Speed Endurant Automatic

Recently Updated

$47,900 USD

*** ASK FOR LOW COST DELIVERY AVAILABLE TO ALL 48 STATES!! ***, AUTOMATIC!!! SLIDING 5TH WHEEL, LIQUID DEF, TC, X15 CUMMINS ENGINE Se Habla Español! NO CREDIT? BAD CREDIT? NO PROBLEM!! OPEN...

Condition	Used
Usage	518,345 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
Rear Axle	Tandem Axle
Stock Number	H01508-DELIVERY 2 U
MLS Number	13282491
Category	Sleeper Semi Trucks
Last Updated	6/27/2025
Location	Houston, TX, US
Sold By	Diamond Truck Sales Inc

16 0

2020 International LT625 Sleeper Semi Truck - 73" Integral Sleeper, Cummins 450HP, 12 Speed Automatic

Recently Updated

$43,500 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	673,729 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	73"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	337998
MLS Number	12078722
Category	Sleeper Semi Trucks
Last Updated	7/2/2025
Location	Carson, CA, US
Sold By	Penske Used Trucks

20 0

2019 International LT625 Day Cab Truck - Cummins 450HP, 12 Speed Automatic

$39,000 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	266,602 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	450 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Sleeper Size	0"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	51936
MLS Number	13642843
Category	Day Cab Semi Trucks
Last Updated	7/2/2025
Location	Holland, MI, US
Sold By	Penske Used Trucks

23 0

2022 International LT625 Sleeper Semi Truck - 73" Integral Sleeper, Cummins 450HP, 12 Speed Automatic

$62,500 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	477,201 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	73"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.64 ratio
Stock Number	UPS235019
MLS Number	13669035
Category	Sleeper Semi Trucks
Last Updated	6/26/2025
Location	Brooklyn Park, MN, US
Sold By	Penske Used Trucks

23 0

2022 International LT625 Sleeper Semi Truck - 73" Integral Sleeper, Cummins 450HP, 12 Speed Automatic

$55,250 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	567,865 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	73"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.64 ratio
Stock Number	UPS235018
MLS Number	13669030
Category	Sleeper Semi Trucks
Last Updated	6/26/2025
Location	Brooklyn Park, MN, US
Sold By	Penske Used Trucks

25 0

2022 International LT625 Sleeper Semi Truck - 73" Integral Sleeper, Cummins 450HP, 12 Speed Automatic

$66,500 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	516,969 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	73"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.64 ratio
Stock Number	UPP235159
MLS Number	13599994
Category	Sleeper Semi Trucks
Last Updated	6/27/2025
Location	Greeley, CO, US
Sold By	Penske Used Trucks

27 0

2022 International LT625 Sleeper Semi Truck - 73" Integral Sleeper, Cummins 450HP, 12 Speed Automatic

$77,250 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	419,377 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	73"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.64 ratio
Stock Number	UPP235149
MLS Number	13587316
Category	Sleeper Semi Trucks
Last Updated	7/2/2025
Location	Fontana, CA, US
Sold By	Penske Used Trucks