2021 Kenworth T680

$41,900

UsedClass 8Day Cab

Grand Rapids, MI, FL

Year

2021

Engine

Cummins ISX / X15

Horsepower

400 HP

Transmission

Automated Manual

Axle Config

6x4

Fuel

Diesel

Description

2021 Kenworth T680 UMJ434884A

Specifications

Engine

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

Drivetrain

Transmission: Automated Manual
Axle Config

Dealer

Michigan Kenworth

Grand Rapids, MI, FL

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2021 Kenworth T680

$41,900

UsedClass 8Day Cab

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Grand Rapids, MI, FL

Chassis

Wheelbase: 228"
GVWR: 33,001 lbs

Details

Body Type: Truck-Tractor

VIN

1XKYD49X3MJ434884

NHTSA Verified

Stock #

csm-Truck

Dealer

Michigan Kenworth

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Market Index

2021 Kenworth T680 ISX / X15

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Median Price

$46,900

This listing

11% below market median

Active listings

Specifications

Engine

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

Drivetrain

Transmission: Automated Manual
Axle Config: 6x4

Chassis

Wheelbase: 228"
GVWR: 33,001 lbs

Details

Body Type: Truck-Tractor

Description

2021 Kenworth T680 UMJ434884A

Finance calculator

2021 Kenworth T680

Est. monthly

$802.48

Vehicle price

Pre-tax purchase price

Term (months)

Down payment (10%)

$4,190

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

$38,210

Total interest

$9,939

Total cost

$52,339

Effective / month

$802.48

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.