Equipment unit · VIN-decoded · NHTSA vPIC

1987 Kenworth T600

1XKAD49X5HJ170557 · Truck-Tractor · TRUCK
T600
Carriers run under1
16 mo
Inspections4
all-time
OOS inspections1
of 4
First seenSep 14, 2023
NV
Last seenJan 13, 2025
CA
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1XKAD49X5HJ170557
Make
Kenworth
Model
T600
Model year
1987
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 10, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
Decode evidence & sources

Deterministic structure

These fields come directly from VIN positions and the published checksum calculation, with zero store IO.

World manufacturer identifier
1XK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
AD49X

Deterministic · VIN positions 4–8.

Check digit
5 · valid

Deterministic · position 9; calculated value 5.

Model year candidates
1987 or 2017

Position 10 repeats every 30 years; both candidates are retained and neither is silently selected.

North American serial sequence
170557

Deterministic · positions 12–17 for a North American WMI.

Sourced platform inference

The prefix store publishes only at support ≥ 3 and purity ≥ 90%. Prefix confidence is shown beside every established platform claim.

Make
KENWORTH

Prefix basis · 5,142 decoded VINs at 90.1% prefix purity.

Model
T6 Series

Prefix basis · 5,142 decoded VINs at 90.1% prefix purity.

Model line
T600

Sourced label · prefix basis 5,142 decoded VINs at 90.1% prefix purity.

Generation
Not established

No sourced generation label is established.

No source established for this field.

Cab type
Not established

No sourced cab label is established.

No source established for this field.

Federal observation (NHTSA vPIC)

What the federal corpus observed directly for this exact VIN — independent of, and sometimes more specific than, the prefix-level inference above.

Observed model year
1987

Observed directly for this VIN via NHTSA vPIC.

Observed make
KENWORTH

Observed directly for this VIN via NHTSA vPIC.

Observed model
T600

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck-Tractor

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRUCK

Observed directly for this VIN via NHTSA vPIC.

GVWR
Class 8: 33,001 lb and above (14,969 kg and above)

Observed directly for this VIN via NHTSA vPIC.

Not established

  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Sep 14, 2023 – Jan 13, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Jan 13, 2025CAIII · Driver-only0P SILVA & SONS INC 3091396YP33772/CA
Apr 23, 2024CAI · Full0P SILVA & SONS INC 3091396YP33772/CA
Jan 11, 2024COIII · Driver-only4P SILVA & SONS INC 3091396YP33772/CA
Sep 14, 2023NVII · Walk-around2OOSP SILVA & SONS INC 3091396YP33772/CA
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
P SILVA & SONS INC3091396Sep 14, 2023Jan 13, 20254CA
Names are left-joined from the FMCSA census; a DOT with no census match falls back to its number.
04

Plate & unit-number history

The same truck under different plate registrations across carriers

PlateState / prov.Unit no.CarrierDate rangeInsp.
YP33772CAP SILVA & SONS INCSep 14, 2023Jan 13, 20254
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 10, 2026