Sleeper Trucks For Sale in Colorado

2002 Freightliner CST120 T/A Truck Tractor

At auction Jul. 16

2002 Freightliner Century CST120 T/A Truck Tractor, 5,117 Hrs Showing, 595,733 miles Showing, Title Will Be Marked Miles Exempt, Detroit Series 60 12.7L Turbo Diesel Engine, Engine Brake,...

Condition	Used
Stock Number	LJ3081
MLS Number	14466104
Category	Sleeper Semi Trucks
Last Updated	7/10/2026
Location	Watkins, CO, US 12 mi. away
Listed By	BigIron Auctions

(844) 734-___ SHOW
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1989 Peterbilt 379 Sleeper Semi Truck

$54,000 USD

1989 Peterbilt 379 tandem axle sleeper, Caterpillar 3406B diesel, 317HP, 18 speed transmission. Wheelbase measures 232 inches. The truck has a shaft-mounted water pump to work with the water...

Condition	Used
Stock Number	JLZ0bAsN474384
MLS Number	13963416
Category	Sleeper Semi Trucks
Last Updated	1/15/2026
Location	Arvada, CO, US 12 mi. away
Sold By	Proxy Equipment

(844) 734-___ SHOW
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2007 Peterbilt 386 Sleeper Semi Truck

$45,900 USD

2007, Peterbilt, 386, sleeper cab, 799,378 miles and 27526 hours, Cat C15 acert, 500 hp diesel motor with 600 miles on documented platinum kit overhaul, fuller 13 speed automatic...

Condition	Used
Usage	27,526 Hours
Stock Number	SCY0WjoF824077
MLS Number	12844791
Category	Sleeper Semi Trucks
Last Updated	1/6/2026
Location	Ft Lupton, CO, US 23 mi. away
Sold By	Proxy Equipment

(855) 825-___ SHOW
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2021 Peterbilt 389EXHD Sleeper Semi Truck

$165,000 USD

Cummins X15 Performance Series, 565 HP, 18 speed, 285 WB, air ride, New Toyo 24.5 LP tires, 78" Unibilt High roof sleeper, 3.55 ratio, jake, A/C, P.S., chrome bumper, dual aluminum fuel...

Quantity	2
Condition	Used
Usage	375,000 Miles
Horse Power	565 HP
Engine Model	Cummins X15 Performance Series
Transmission	18 Speed Manual
Sleeper Type	Unibilt
Sleeper Size	78"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.55 ratio
Stock Number	210815
MLS Number	12363659
Category	Sleeper Semi Trucks
Last Updated	5/13/2025
Location	Greeley, CO, US 46 mi. away
Sold By	Western Equipment & Truck, Inc.

(855) 790-___ SHOW
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2016 Peterbilt 579 Semi Truck

At auction Jul. 23

2016 Peterbilt 579 semi truck, Miles: 942,646 on odometer, Hours: 30,887 on meter, VIN: 1XPBDP9X3GD293609, Engine, Paccar MX-13, Displacement: 12.9L, Cylinders: 6, Fuel type: Diesel,...

Condition	Used
Usage	30,887 Hours
Stock Number	ED0174
MLS Number	14445424
Category	Sleeper Semi Trucks
Last Updated	6/24/2026
Location	Pueblo West, CO, US 98 mi. away
Listed By	Purple Wave Auction

2013 Freightliner Cascadia 125 T/A Truck Tractor

At auction Jul. 16

2013 Freightliner Cascadia 125 T/A Truck Tractor, 788,186 miles Showing, Title Will Be Marked Miles Exempt, Detroit DD15 14.8L 6-Cylinder Turbo Diesel Engine, Engine Brake, Block Heater,...

Condition	Used
Stock Number	LM4859
MLS Number	14464208
Category	Sleeper Semi Trucks
Last Updated	7/10/2026
Location	Lamar, CO, US 175 mi. away
Listed By	BigIron Auctions

1999 International 9400 Eagle T/A Truck Tractor

At auction Jul. 22

1999 International 9400 Eagle T/A Truck Tractor, 32,035 Hrs Showing, 475 hp, 122,729 miles Showing, Title Will Be Marked Miles Exempt, CAT 3406E 14.6L Inline 6-Cyl Turbocharged Engine, Eaton...

Condition	Used
Stock Number	HS4021
MLS Number	14473213
Category	Sleeper Semi Trucks
Last Updated	7/17/2026
Location	Grant, NE, US 183 mi. away
Listed By	BigIron Auctions

2005 Peterbilt 379 Sleeper Semi Truck - Caterpillar, 18 Speed Allison Hs Manual

$78,000 USD

232989 Miles, Engine: CATERPILLAR C15 ACERT, 18 Speed Allison HS Manual Transmission, Drive: 6x4, Tandem Rear Axles

Condition	Used
Usage	232,989 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Engine Model	Caterpillar C15 ACERT
Drivetrain	6x4
Transmission	18 Speed Allison HS Manual
Rear Axle	Tandem Axle
MLS Number	13612064
Category	Sleeper Semi Trucks
Last Updated	5/30/2025
Location	Vernal, UT, US 253 mi. away
Sold By	Mideast Equipment Supply

2004 Peterbilt 379 Sleeper Semi Truck - Caterpillar, 18 Speed Allison Hs Manual

$85,000 USD

FOR SALE: 2004 Peterbilt 379 - Classic Power! Features the legendary 6NZ CAT engine (approx. 100k miles on overhaul) have paperwork and warranty on overhaul from Peterbilt, robust 18-speed...

Condition	Used
Usage	294,567 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Engine Model	Caterpillar C15
Drivetrain	6x4
Transmission	18 Speed Allison HS Manual
Suspension	Air Ride
Rear Axle	Tandem Axle
MLS Number	13601734
Category	Sleeper Semi Trucks
Last Updated	5/28/2025
Location	Vernal, UT, US 253 mi. away
Sold By	Mideast Equipment Supply

2003 Kenworth W900 Sleeper Semi Truck - Caterpillar, 18 Speed Allison Hs Manual

$25,000 USD

Engine will need an inframe hence the price. 18 Speed with 40k rears. Has a Gardner Denver blower as well

Condition	Used
Usage	835,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Engine Model	Caterpillar C15 ACERT
Transmission	18 Speed Allison HS Manual
Stock Number	T3020-SL
MLS Number	13451606
Category	Sleeper Semi Trucks
Last Updated	3/25/2025
Location	Vernal, UT, US 253 mi. away
Sold By	Mideast Equipment Supply

2011 Peterbilt 367 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 500HP, 13 Speed I Shift Manual

$39,000 USD

2011 Peterbilt 367, 13 speed Cummins isx Motor, Engine transmission and fuel system all rebuilt or replaced 60k miles ago,

Condition	Used
Usage	1,199,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins ISX
Drivetrain	6x2
Transmission	13 Speed I Shift Manual
Sleeper Type	Raised Roof Sleeper
Suspension	4 Bag Air Ride
Rear Axle	Tandem Axle
Stock Number	T3008-SL
MLS Number	13425532
Category	Sleeper Semi Trucks
Last Updated	3/25/2025
Location	Vernal, UT, US 253 mi. away
Sold By	Mideast Equipment Supply

2015 Kenworth T800 Sleeper Semi Truck - Cummins 550HP, 18 Speed Allison Hs Manual

$70,000 USD

2015 Kenworth T800 for sale. Only 100k miles on overhaul. Cummins ISX. 46k Rear ends. Tag Axle. Good rubber. Call for more information or to schedule a time to look in person

Condition	Used
Usage	100,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	550 HP
Engine Model	Cummins ISX15
Transmission	18 Speed Allison HS Manual
Suspension	AG 460
Stock Number	T3006-SL
MLS Number	13415839
Category	Sleeper Semi Trucks
Last Updated	3/25/2025
Location	Vernal, UT, US 253 mi. away
Sold By	Mideast Equipment Supply

2010 Kenworth W900 Sleeper Semi Truck - Cummins 550HP, 18 Speed Allison Hs Manual

$85,000 USD

2010 Kewnworth W900 For Sale. New overhaul done only 500 miles ago. Cummins ISX 550. 18 Speed. 46k lb Rears. Tag Axle. Good Tread. Truck is ready to work

Condition	Used
Usage	500 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	550 HP
Engine Model	Cummins ISX
Transmission	18 Speed Allison HS Manual
Rear End	46,000 lb
Stock Number	T3009-SL
MLS Number	13412045
Category	Sleeper Semi Trucks
Last Updated	3/25/2025
Location	Vernal, UT, US 253 mi. away
Sold By	Mideast Equipment Supply

2010 Peterbilt 388 T/A Truck Tractor

At auction Jul. 16

2010 Peterbilt 388 T/A Truck Tractor, 904,094 miles Showing, Title Will Be Marked Miles Exempt, 6-Cylinder 485 Dual Overhead Cam Cummins Diesel Engine, 10 Speed Eaton Fuller Transmission,...

Condition	Used
Stock Number	LJ2161
MLS Number	14473177
Category	Sleeper Semi Trucks
Last Updated	7/10/2026
Location	Dolores, CO, US 253 mi. away
Listed By	BigIron Auctions

(307) 358-___ SHOW
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1996 Peterbilt 377 Sleeper Semi Truck

$40,000 USD

For Sale by Owner 1996 Peterbilt 377, Odometer: 633,681 (subject to change), Engine Hours: 9,350 (subject to change), Engine: Cummins ISB 305 (305 H.P.), Transmission: Eaton 10-Speed,...

Condition	Used
Usage	9,350 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	305 HP
Engine Model	Cummins ISB 305
Emission Rating	EPA 2003 3.6
Drivetrain	4x2
Transmission	10 Speed Freedom Line Manual
Sleeper Type	Unibilt
Sleeper Size	60"
Suspension	Low Air
Rear Axle	Single Axle
Rear End	17,000 lb 3.73 ratio
MLS Number	14372593
Category	Sleeper Semi Trucks
Last Updated	5/15/2026
Location	Rock Springs, WY, US 261 mi. away
Sold By	Legend Services Inc.

(844) 708-___ SHOW
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2011 Peterbilt 386 Sleeper Semi Truck - 70" Mid Roof Sleeper, Cummins 485HP, 13 Speed Manual

$21,500 USD

2011 Peterbilt 386 with Cummins ISX 15 485HP deleted, manual 13 Speed Eaton Fuller transmission, 3.36 rear ends, 240" wheelbase, 50,000# GVWR, all aluminum wheels, air ride suspension, 1,330...

Condition	Used
Usage	28,063 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	485 HP
Engine Model	Cummins ISX15 485
Drivetrain	6x4
Transmission	13 Speed Manual
Sleeper Type	Mid Roof Sleeper
Sleeper Size	70"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	3.36 ratio
Stock Number	SBA1109
MLS Number	13764222
Category	Sleeper Semi Trucks
Last Updated	6/5/2026
Location	Roosevelt, UT, US 273 mi. away
Sold By	SellBuyAuction

2020 Peterbilt 579 T/A Truck Tractor

At auction Jul. 16

2020 Peterbilt 579 T/A Truck Tractor, 486 hp, 507,064 miles Showing, Title Will Be Marked Miles Exempt, PACCAR MX-13 12.9L 6-Cyl Turbo Diesel Engine, Eaton Auto Shift Plus 12-Speed...

Condition	Used
Stock Number	LA3412
MLS Number	14458163
Category	Sleeper Semi Trucks
Last Updated	7/11/2026
Location	Lexington, NE, US 279 mi. away
Listed By	BigIron Auctions

(855) 790-___ SHOW
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2020 Freightliner Cascadia Semi Truck

At auction Jul. 23

2020 Freightliner Cascadia semi truck, Miles: 567,131 on odometer, Hours: 22,677 on meter, VIN: 1FUJHHDR6LLLP0370, Unit #: 48112916, Engine, Detroit Diesel DD15, Displacement: 14.8L,...

Condition	Used
Usage	22,677 Hours
Stock Number	YA3021
MLS Number	14438465
Category	Sleeper Semi Trucks
Last Updated	6/19/2026
Location	Albuquerque, NM, US 341 mi. away
Listed By	Purple Wave Auction

1985 Kenworth K100 T/A Truck Tractor

At auction Jul. 16

1985 Kenworth K100 T/A Truck Tractor, 855,394 miles Showing, Title Will Be Marked Miles Exempt, Cummins Big Cam 400 Diesel Engine, Eaton Fuller 13-Speed Transmission, 8 Bag Air Ride...

Condition	Used
Stock Number	KS3605
MLS Number	14455487
Category	Sleeper Semi Trucks
Last Updated	7/11/2026
Location	Doniphan, NE, US 350 mi. away
Listed By	BigIron Auctions

1974 Kenworth K100 T/A Truck Tractor

At auction Jul. 16

1974 Kenworth K100 T/A Truck Tractor, 410 hp, 512,519 miles Showing, Title Will Be Marked Miles Exempt, Cummins NTC-855 Big Cam 3 Diesel Engine, Eaton Fuller RTLO16913A 13-Speed Transmission...

Condition	Used
Stock Number	KS3592
MLS Number	14453770
Category	Sleeper Semi Trucks
Last Updated	7/10/2026
Location	Saint Paul, NE, US 352 mi. away
Listed By	BigIron Auctions

2005 International 9200I T/A Truck Tractor

Newly Listed

At auction Jul. 29

2005 International 9200I T/A Truck Tractor, 41,888 Hrs Showing, 435 hp, 1,087,045 miles Showing, Title Will Be Marked Miles Exempt, Cummins ISX435ST 6-Cyl Turbo Diesel, 10 Speed Eaton Fuller...

Condition	Used
Stock Number	LM9287
MLS Number	14488701
Category	Sleeper Semi Trucks
Last Updated	7/17/2026
Location	Ellsworth, KS, US 363 mi. away
Listed By	BigIron Auctions

(855) 939-___ SHOW
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2012 Peterbilt 388 ARI Big-Bunk Sleeper Semi Truck

$94,500 USD

2012 peterbilt 388 big bunk, Mx13 paccar, One owner one operator since new, New crate motor in 2023, $67,000 with paperwork from dealer still under warranty only 4600hrs on new motor,...

Warranty

Condition	Used
Usage	1,400,000 Miles
Engine Model	Paccar MX13
Transmission	18 Speed
Sleeper Type	ARI - Legacy
Sleeper Size	90"
Suspension	Flex Air
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.55 ratio
Stock Number	ID021726JES
MLS Number	14148074
Category	Sleeper Semi Trucks
Last Updated	2/17/2026
Location	Mountain West, CO, US 641 mi. away
Sold By	Carmody and Associates Inc

(855) 939-___ SHOW
NUMBERCall Seller

2003 Peterbilt 379EXHD Flat-Top Sleeper Semi Truck

$109,500 USD

2003 Peterbilt 379 exhd, 550 cat c15 6nz, Full tilt manifold, Borg Warner s410sx, 400k on platinum kit, 18 speed, American class interior, 63” flat top sleeper, 275” wheel base,...

Condition	Used
Stock Number	ID021726JES
MLS Number	14148072
Category	Sleeper Semi Trucks
Last Updated	2/17/2026
Location	Mountain West, CO, US 641 mi. away
Sold By	Carmody and Associates Inc

(855) 939-___ SHOW
NUMBERCall Seller

2005 Kenworth W900L Sleeper Semi Truck

$60,000 USD

2005 KW w900l, Fantastic condition heavy haul semi. This Kenworth can work., PTO wetkit with hydraulic fluid tank, New tires, Cummins motor (new motor swapped in instead of overhaul),...

Condition	Used
Stock Number	ID081525JES
MLS Number	13763153
Category	Sleeper Semi Trucks
Last Updated	8/15/2025
Location	Mountain West, CO, US 641 mi. away
Sold By	Carmody and Associates Inc