12 Speed Trucks with Flex Air Suspension For Sale

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Featured Item
2022 Peterbilt 579 Sleeper Semi Truck
27 1

2022 Peterbilt 579 Sleeper Semi Truck

$79,900 USD
2022 Peterbilt 579 – Road Ready and Fleet Friendly! Stock1272928, Looking for late-model trucks that are driver-preferred and ready to roll? Check out our 2022 Peterbilt 579 units, built...
Quantity6
ConditionUsed
Usage424,000 Miles
Duty ClassHeavy Duty Sleeper Semi Truck
Horse Power400 HP
Engine ModelCummins X15
Drivetrain6x4
Transmission12 Speed Endurant Automated
Sleeper TypeUnibilt
Sleeper Size80"
SuspensionFlex Air
Rear AxleTandem Axle
Rear End40,000 lb 2.79 ratio
Stock Number1272928
MLS Number13503970
CategorySleeper Semi Trucks
Last Updated7/19/2025
Location
Atlanta, GA, US
Sold By

Rush Truck Centers Atlanta

Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic
12 0

2020 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic

$99,950 USD
**MAKE AN OFFER!** Used Peterbilt 579 sleeper for sale. Features: Air Ride Cab, Carrier APU, Stainless Mudflap Brackets, Stainless Quarter Fenders, Hood Spot Mirrors, Painted Sun Visor with...
ConditionUsed
Usage6,121 Hours
Duty ClassHeavy Duty Sleeper Semi Truck
Horse Power455 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Endurant Automatic
Sleeper TypeRaised Roof Sleeper
Sleeper Size80"
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 2.64 ratio
Stock Number22P267
MLS Number11611102
CategorySleeper Semi Trucks
Last Updated7/16/2025
Location
Coopersburg, PA, US
Sold By

Coopersburg & Liberty Kenworth

Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic
10 0

2020 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic

$99,950 USD
**MAKE AN OFFER!** Used Peterbilt 579 Sleeper for sale. Features: Air Ride Cab, Espar Heater, Stainless Quarter Fenders, Stainless Mudflap Brackets, Hood Spot Mirrors, Sun Visor with Lights,...
ConditionUsed
Usage6,516 Hours
Duty ClassHeavy Duty Sleeper Semi Truck
Horse Power455 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Endurant Automatic
Sleeper TypeRaised Roof Sleeper
Sleeper Size80"
SuspensionFlex Air
Rear AxleTandem Axle
Rear End40,000 lb 2.64 ratio
Stock Number22P265
MLS Number11603990
CategorySleeper Semi Trucks
Last Updated7/16/2025
Location
Coopersburg, PA, US
Sold By

Coopersburg & Liberty Kenworth

Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic
12 0

2020 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic

$99,950 USD
**MAKE AN OFFER!** Used Peterbilt 579 Sleeper for sale. Features: Air Ride Cab, Carrier APU, Stainless Quarter Fenders, Stainless Mudflap Brackets, Aluminum Storage Box, 2 Hood Spot Mirrors,...
ConditionUsed
Usage7,509 Hours
Duty ClassHeavy Duty Sleeper Semi Truck
Horse Power455 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Endurant Automatic
Sleeper TypeRaised Roof Sleeper
Sleeper Size80"
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 2.64 ratio
Stock Number22P262
MLS Number11603938
CategorySleeper Semi Trucks
Last Updated7/16/2025
Location
Coopersburg, PA, US
Sold By

Coopersburg & Liberty Kenworth

Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic
10 0

2020 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic

$99,950 USD
**MAKE AN OFFER!** Used Peterbilt 579 sleeper for sale. Features: Air Ride Cab, Carrier APU, Stainless Mudflap Brackets, Stainless Quarter Fenders, Hood Spot Mirrors, Painted Sun Visor with...
ConditionUsed
Usage6,865 Hours
Duty ClassHeavy Duty Sleeper Semi Truck
Horse Power455 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Endurant Automatic
Sleeper TypeRaised Roof Sleeper
Sleeper Size80"
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 2.64 ratio
Stock Number22P266
MLS Number11603910
CategorySleeper Semi Trucks
Last Updated7/16/2025
Location
Coopersburg, PA, US
Sold By

Coopersburg & Liberty Kenworth

Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic
12 0

2020 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Automatic

$99,950 USD
**MAKE AN OFFER!** Used Peterbilt 579 High-top Sleeper for sale. Features: Air Ride Cab, Carrier APU, Aluminum Storage Box, Stainless Quarter Fenders, Stainless Mudflap Brackets, Hood Spot...
ConditionUsed
Usage7,649 Hours
Duty ClassHeavy Duty Sleeper Semi Truck
Horse Power455 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Endurant Automatic
Sleeper TypeRaised Roof Sleeper
Sleeper Size80"
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 2.64 ratio
Stock Number22P264
MLS Number11598822
CategorySleeper Semi Trucks
Last Updated7/16/2025
Location
Coopersburg, PA, US
Sold By

Coopersburg & Liberty Kenworth

2022 Peterbilt 579 Sleeper Semi Truck (Multiples Available)
23 1

2022 Peterbilt 579 Sleeper Semi Truck (Multiples Available)

$74,900 USD
2022 Peterbilt 579 – 80" Ultraloft Sleeper, X15 Power, Thermo King APU Stock #1271561 This 2022 Peterbilt 579 is spec’d for comfort and efficiency with a strong focus on uptime and fuel...
Quantity6
ConditionUsed
Usage427,300 Miles
Duty ClassHeavy Duty Sleeper Semi Truck
Horse Power400 HP
Engine ModelCummins ISX
Drivetrain6x4
Transmission12 Speed Endurant Automated
Sleeper TypeUltraLoft
Sleeper Size80"
SuspensionFlex Air
Rear AxleTandem Axle
Rear End2.79 ratio
Stock Number1271561
MLS Number13523900
CategorySleeper Semi Trucks
Last Updated7/9/2025
Location
Atlanta, GA, US
Sold By

Rush Truck Centers Atlanta

Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Cummins 500HP, 12 Speed Amt
43 0

2019 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Cummins 500HP, 12 Speed Amt

$57,900 USD
New Transmission Dec 2023,,
ConditionUsed
Usage449,157 Miles
Duty ClassHeavy Duty Sleeper Semi Truck
Horse Power500 HP
Engine ModelCummins X15
Drivetrain6x4
Transmission12 Speed Automated
Sleeper TypeRaised Roof Sleeper
Sleeper Size80"
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 3.08 ratio
Stock NumberC5299
MLS Number13415829
CategorySleeper Semi Trucks
Last Updated6/26/2025
Location
West Sacramento, CA, US
Sold By

DeWald Equipment

Peterbilt 579 Sleeper Semi Truck - Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Amt
14 0

2021 Peterbilt 579 Sleeper Semi Truck - Raised Roof Sleeper, Paccar 455HP, 12 Speed Endurant Amt

$61,900 USD
HUNTER CERTIFIED,
ConditionUsed
Usage385,437 Miles
Duty ClassHeavy Duty Sleeper Semi Truck
Horse Power455 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Endurant Automated
Sleeper TypeRaised Roof Sleeper
SuspensionFlex Air
Rear AxleTandem Axle
Rear End40,000 lb
Stock Number280674
MLS Number13576644
CategorySleeper Semi Trucks
Last Updated5/14/2025
Location
Millstone Township, NJ, US
Sold By

Hunter Truck

Kenworth T680 Tandem Axle Cab & Chassis Truck - Paccar, 400HP, 12 Speed Ultrashift Automatic
26 0

2019 Kenworth T680 Tandem Axle Cab & Chassis Truck - Paccar, 400HP, 12 Speed Ultrashift Automatic

Call for price
2019 KENWORTH T680 3-AXLE, MX13 (400 HP), Engine Brake, Paccar PO-16F112 Automatic Transmission, Meritor MP40-14X3 38,000# Dual Drive Rear Axles (4.11 Ratio), Paccar Flex Air Suspension w/...
ConditionUsed
Usage11,455 Hours
Duty ClassHeavy Duty Cab & Chassis Truck
Horse Power400 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Ultrashift Automatic
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 4.11 ratio
Floor TypeWood Floor
WinchYes
Stock NumberE18200
MLS Number13279726
CategoryCab & Chassis Trucks
Last Updated3/13/2025
Location
Healdsburg, CA, US
Sold By

Opperman & Son, Inc.

Kenworth T680 4800 Gallon Gasoline / Fuel Truck - Paccar 400HP, 12 Speed Automatic
64 0

2020 Kenworth T680 4800 Gallon Gasoline / Fuel Truck - Paccar 400HP, 12 Speed Automatic

Call for price
2019 KENWORTH T680 3-AXLE, MX13 (400 HP), Engine Brake, Paccar PO-16F112 Automatic Transmission, Meritor MP40-14X3 38,000# Dual Drive Rear Axles (4.11 Ratio), Paccar Flex Air Suspension w/...
ConditionUsed
Usage12,522 Hours
Duty ClassHeavy Duty Gasoline / Fuel Truck
Horse Power400 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Automatic
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 4.11 ratio
Capacity4800 Gallons
Stock NumberE18187
MLS Number13307448
CategoryGasoline / Fuel Trucks
Last Updated1/1/2025
Location
Healdsburg, CA, US
Sold By

Opperman & Son, Inc.

Kenworth T680 4800 Gallon Gasoline / Fuel Truck - Paccar 400HP, 12 Speed Automatic
30 0

2019 Kenworth T680 4800 Gallon Gasoline / Fuel Truck - Paccar 400HP, 12 Speed Automatic

Call for price
2019 KENWORTH T680 3-AXLE, MX13 (400 HP), Engine Brake, Paccar PO-16F112 Automatic Transmission, Meritor MP40-14X3 38,000# Dual Drive Rear Axles (4.11 Ratio), Paccar Flex Air Suspension w/...
ConditionUsed
Usage399,181 Miles
Duty ClassHeavy Duty Gasoline / Fuel Truck
Horse Power400 HP
Drivetrain6x4
Transmission12 Speed Automatic
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 4.11 ratio
Capacity4800 Gallons
Stock NumberE18184
MLS Number13289341
CategoryGasoline / Fuel Trucks
Last Updated12/17/2024
Location
Healdsburg, CA, US
Sold By

Opperman & Son, Inc.

Kenworth T680 Tandem Axle Cab & Chassis Truck - Paccar, 400HP, 12 Speed Ultrashift Automatic
27 0

2019 Kenworth T680 Tandem Axle Cab & Chassis Truck - Paccar, 400HP, 12 Speed Ultrashift Automatic

Call for price
2019 KENWORTH T680 3-AXLE MX13 (400 HP), Engine Brake, Paccar PO-16F112 Automatic Transmission, Meritor MP40-14X3 38,000# Dual Drive Rear Axles (4.11 Ratio), Paccar Flex Air Suspension w/...
ConditionUsed
Usage8,402 Hours
Duty ClassHeavy Duty Cab & Chassis Truck
Horse Power400 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Ultrashift Automatic
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 4.11 ratio
Stock NumberE18202
MLS Number13277941
CategoryCab & Chassis Trucks
Last Updated12/11/2024
Location
Healdsburg, CA, US
Sold By

Opperman & Son, Inc.

Kenworth T680 Day Cab Truck - Paccar 405HP, 12 Speed Automatic
30 0

2020 Kenworth T680 Day Cab Truck - Paccar 405HP, 12 Speed Automatic

Call for price
Paccar MX-13 (485HP), Engine Brake, Paccar PO-16F112 12-Speed Automatic Transmission, Paccar 38,000# Dual Rear Drive Axles (3.25 Ratio), Flex Air Suspension w/ Dash Deflate Switch, 12,350#...
ConditionUsed
Usage9,208 Hours
Duty ClassHeavy Duty Day Cab Truck
Horse Power405 HP
Engine ModelPaccar MX-13
Drivetrain6x4
Transmission12 Speed Automatic
SuspensionFlex Air
Rear AxleTandem Axle
Rear End38,000 lb 3.25 ratio
Stock NumberE-17858
MLS Number12446860
CategoryDay Cab Semi Trucks
Last Updated2/13/2024
Location
Healdsburg, CA, US
Sold By

Opperman & Son, Inc.

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