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VIN 1XPBD49XXMD739085 · Stock #petestore-u739085

2021 Peterbilt 579

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UsedClass 8Day Cab

2021 Peterbilt 579

$49,400

UsedClass 8Day Cab

Fort Myers, FL

Miles

516,595 mi

Year

2021

Engine

Cummins X15

Horsepower

400 HP

Transmission

Automated Manual

Axle Config

6x4

Specifications

Full model specs

Engine

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

Drivetrain

Transmission: Automated Manual
Trans. Model: Eaton Automated
Axle Config: 6x4
Rear Ratio: 2.79

Chassis

Wheelbase: 185"
Cab Type: Conventional
GVWR: 33,001 lbs
Front Axle: 12,500 lbs
Rear Axle: 40,000 lbs
Suspension: Air Ride

Details

Mileage: 516,595 mi
Body Type: Truck-Tractor

Dealer

The Peterbilt Store - Fort Myers

Fort Myers, FL

Visit dealer page

Specifications

View 2021 Peterbilt 579 specs

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

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2021 Peterbilt 579 — get instant answers about specs, inspection tips, or comparisons.

Finance calculator

2021 Peterbilt 579 · 516,595 mi

Est. monthly

$944.24

Vehicle price

Pre-tax purchase price

Term (months)

Down payment (10%)

$4,940

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

$44,960

Total interest

$11,695

Total cost

$61,595

Effective / month

$944.24

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.

Market Index

2021 Peterbilt 579 X15

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Median Price

$55,499

This listing

−11% vs. comp median

Active listings

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