Factory build sheet

2021 Chevrolet Express 3500 Cutaway SB

Build 1GB3GRF7-M · 6.6L 8cyl · Rear-wheel drive · Incomplete - Cutaway

VIN positions 1 through 8 read 1GB3GRF7 and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.

Every Express whose VIN starts 1GB3GRF7 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 20 of them.

  • Decoded Sep 9, 2026
  • 20 known VINs
  • 1 listed for sale now

Factory specification

As filed by Chevrolet with NHTSA for this build. Fields the filing does not record are left out entirely — a missing row means no recorded value, not a missing feature.

Engine

Displacement
6.6 L
Cylinders
8
Engine model
L8T
Fuel type
Gasoline

Drivetrain

Drive type
Rear-wheel drive
Brake system
Hydraulic

Body & chassis

Body class
Incomplete - Cutaway
NHTSA body type
INCOMPLETE VEHICLE
Doors
2
Series
3500 Cutaway
Manufacturer
GENERAL MOTORS LLC

Weight rating

GVWR class
Class 3
GVWR
10,001–14,000 lb

Gross vehicle weight rating is the loaded ceiling set by the manufacturer, not the car's own weight.

How this VIN pattern is read

A 17-character VIN carries two kinds of information: what was built, and which one it is. This page is the first kind — the nine highlighted positions.

Positions Characters What they encode
1–3 1GB GENERAL MOTORS LLC · World manufacturer identifier
4–8 3GRF7 Model, body style, engine and restraint system
9 × Check digit — computed per vehicle, not part of the build
10 M Model year — 2021
11 × Assembly plant
12–17 ×××××× Production sequence number, unique to each vehicle

20 vehicles carry this build

Every VIN we have decoded to 1GB3GRF7-M shares the specification above.

  • 20 Known VINs
  • 1 Listed for sale now

Keep going

Where this data comes from

Specification fields are decoded from the manufacturer's filings in the NHTSA vPIC database, keyed on VIN positions 1–8 and 10. We publish the filed values as they stand and leave out anything the filing does not record.

Vehicle counts come from the 20 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.