2021 Peterbilt 579

$44,950

UsedClass 8Sleeper Truck

O'Fallon, MO

Miles

616,663 mi

Year

2021

Engine

Cummins X15

Horsepower

500 HP

Axle Config

6x4

Fuel

Diesel

Specifications

Engine

Make: Cummins
Model: X15
HP: 500
Displacement: 15L
Fuel: Diesel

Drivetrain

Trans. Model: 17F112C

Dealer

TLG Peterbilt

O'Fallon, MO

Visit dealer page

Search trucks

1 / 12

2021 Peterbilt 579

$44,950

UsedClass 8Sleeper Truck

Link copied!

O'Fallon, MO

Chassis

Wheelbase: 250"
GVWR: 52,350 lbs
Susp. Rear: Low Air Leaf

Details

Mileage: 616,663 mi
Body Type: Truck-Tractor

VIN

1XPBD49XXMD756047

NHTSA Verified

Stock #

1XPBD49XXMD756047

Dealer

TLG Peterbilt

Your nameYour email addressYour phone number

By submitting this form you agree to receive SMS and email from this dealer regarding your inquiry. Msg & data rates may apply. Reply STOP to opt out at any time.

Is this your dealership? Claim it

Get notified about trucks like this

We'll email you when similar listings are added or prices drop.

Market Index

2021 Peterbilt 579 X15

View full index →

Median Price

$59,439

This listing

24% below market median

Active listings

265

Specifications

Engine

Make: Cummins
Model: X15
HP: 500
Displacement: 15L
Fuel: Diesel

Drivetrain

Trans. Model: 17F112C
Axle Config: 6x4
Rear Ratio: 3.25

Chassis

Wheelbase: 250"
GVWR: 52,350 lbs
Susp. Rear: Low Air Leaf

Sleeper

Size: 80"

Details

Mileage: 616,663 mi
Body Type: Truck-Tractor

Finance calculator

2021 Peterbilt 579 · 616,663 mi

Est. monthly

$860.13

Vehicle price

Pre-tax purchase price

Term (months)

Down payment (10%)

$4,495

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

$40,955

Total interest

$10,653

Total cost

$56,103

Effective / month

$860.13

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.