2021 Peterbilt 579

$54,900

UsedClass 8Day Cab

Jacksonville, FL

Miles

426,664 mi

Year

2021

Engine

Cummins X15

Horsepower

400 HP

Transmission

Automated Manual

Axle Config

6x4

Description

This 2021 Peterbilt 579 Day Cab is clean, serviced, and ready for work. Powered by a reliable Cummins engine and paired with a 12-speed automated Endurant transmission, it delivers dependable performance and efficiency. Built with a 185" wheelbase and Peterbilt Low Air Leaf suspension, it offers stability and a smooth ride. Recently fully serviced with an 86-point inspection and DOT certification, this truck is road-ready and equipped with all new tires for added value. With just 426,278 miles, it’s a low-mileage, well-maintained unit. Multiple trucks are available—perfect for fleets or owner-operators looking to expand.

Specifications

Engine

Make: Cummins
Model: X15
HP: 400
Displacement: 15L
Fuel: Diesel

Drivetrain

Transmission: Automated Manual

Dealer

Rush Truck Centers

Jacksonville, FL

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2021 Peterbilt 579

$54,900

UsedClass 8Day Cab

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Jacksonville, FL

Chassis

Wheelbase: 185"
Cab Type: Conventional
GVWR: 53,200 lbs
Front Axle: 13,200 lbs
5th Wheel Type: Jost JSK36

Equipment

Wheels: Aluminum

Details

Mileage: 426,664 mi
Body Type: Truck-Tractor

VIN

1XPBD49X2MD738545

NHTSA Verified

Stock #

rush-591694

Dealer

Rush Truck Centers

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Market Index

2021 Peterbilt 579 X15

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Median Price

$59,439

This listing

8% below market median

Active listings

265

Specifications

Engine

Make: Cummins
Model: X15
HP: 400
Displacement: 15L
Fuel: Diesel

Drivetrain

Transmission: Automated Manual
Trans. Make: Eaton
Speeds: 12
Axle Config: 6x4
Rear Ratio: 2.79

Chassis

Wheelbase: 185"
Cab Type: Conventional
GVWR: 53,200 lbs
Front Axle: 13,200 lbs
5th Wheel Type: Jost JSK36

Equipment

Wheels: Aluminum

Details

Mileage: 426,664 mi
Body Type: Truck-Tractor

Description

Finance calculator

2021 Peterbilt 579 · 426,664 mi

Est. monthly

$1,048.20

Vehicle price

Pre-tax purchase price

Term (months)

Down payment (10%)

$5,490

Owner-ops: 10–20% typical

APR (9.50%)

Prime 7–9% · Median 9–12% · Subprime 14%+

Trade-in value

Deducted from financed amount

Condition

Drives Federal Excise Tax (FET)

Federal Excise Tax (FET)

FET applies$0

Skip if straight truck under 33k GVWR or trailer under 26k GVWR.

Off — used vehicles are exempt

Sales tax (0.00%)

Often 0% for interstate commercial use

Doc fee

Some states cap (CA $85, NY $75)

Title + registration

State title + lien fee

Balloon payment at end

Lowers monthly; paid as lump at term

Apply Section 179 first-year deduction

Heavy trucks (GVWR > 14,000 lbs) qualify for full deduction up to $1,220,000 in 2026. Assumes purchase in service this tax year. Consult a CPA.

Amount financed

$49,910

Total interest

$12,982

Total cost

$68,382

Effective / month

$1,048.20

Estimate only. Actual financing depends on credit, dealer program, and lender terms. Heavy-truck APRs typically range 7–18% depending on credit tier, vehicle age, and LTV. Interstate commercial-use purchases are often exempt from state sales tax. TruckRadar is not a lender. Consult a commercial-vehicle lender for binding quotes.