Equipment unit · VIN-decoded · NHTSA vPIC

2024 Kenworth W990

1NK1L40XXRJ381720 · Truck · INCOMPLETE VEHICLE
Carriers run under2
19 mo
Inspections5
all-time
OOS inspections0
of 5
First seenAug 12, 2024
CA
Last seenMar 4, 2026
CA
Inspected under 2 different carriers in 19 months
A unit that bounces between many operators can indicate slip-seating, heavy sub-haul, or double-brokering. Review the carrier timeline below for load integrity — context for human judgment, not a verdict.
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1NK1L40XXRJ381720
Make
Kenworth
Model
W990
Model year
2024
Body class
Truck
Vehicle type
INCOMPLETE VEHICLE
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 28, 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
1NK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
1L40X

Deterministic · VIN positions 4–8.

Check digit
X · valid

Deterministic · position 9; calculated value X.

Model year candidates
1994 or 2024

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

North American serial sequence
381720

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.

Not established

No supported platform claim is established for this prefix

The resolver answered successfully but returned no row above the evidence floor. This does not mean the vehicle has no platform or that no data exists; it means this store cannot make the claim.

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
2024

Observed directly for this VIN via NHTSA vPIC.

Observed make
KENWORTH

Observed directly for this VIN via NHTSA vPIC.

Observed model
W990

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
INCOMPLETE VEHICLE

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

  • platform make
  • platform model
  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Aug 12, 2024 – Mar 4, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Mar 4, 2026CAI · Full0GREWALZ CO INC 277451915836H4/CA
Oct 1, 2025CAI · Full0GREWALZ CO INC 2774519EP11201/CA
Oct 1, 2025CAI · Full0GREWALZ CO INC 2774519EP11201/CA
Feb 11, 2025CAI · Full0GREWALZ CO INC 2774519EP11201/CA
Aug 12, 2024CAI · Full3PACIFICROCK TRANSPORTATION INC 2804920CP86738/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
GREWALZ CO INC2774519Feb 11, 2025Mar 4, 20264CA
PACIFICROCK TRANSPORTATION INC2804920Aug 12, 2024Aug 12, 20241CA
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.
15836H4CAGREWALZ CO INCMar 4, 2026Mar 4, 20261
EP11201CAGREWALZ CO INCFeb 11, 2025Oct 1, 20253
CP86738CAPACIFICROCK TRANSPORTATION INCAug 12, 2024Aug 12, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 28, 2026