Factory build sheet
2021 Chevrolet Express 3500 Cutaway SB
Build 1GB3GRB7-M · 6.6L 8cyl · Rear-wheel drive · Incomplete - Cutaway
VIN positions 1 through 8 read 1GB3GRB7 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 1GB3GRB7 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 31 of them.
- Decoded Jul 7, 2026
- 31 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 | 3GRB7 | 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 |
31 vehicles carry this build
Every VIN we have decoded to 1GB3GRB7-M shares the specification above.
- 31 Known VINs
- 1 Listed for sale now
- 1GB3GRB7 0M1265738
- 1GB3GRB7 8M1265406
- 1GB3GRB7 2M1228206
- 1GB3GRB7 2M1309058
- 1GB3GRB7 5M1301875
- 1GB3GRB7 3M1308873
- 1GB3GRB7 1M1264940
- 1GB3GRB7 7M1238777
- 1GB3GRB7 4M1229065
- 1GB3GRB7 1M1265912
- 1GB3GRB7 1M1301873
- 1GB3GRB7 5M1300693
- 1GB3GRB7 8M1308674
- 1GB3GRB7 3M1242308
- 1GB3GRB7 0M1227295
- 1GB3GRB7 XM1238434
- 1GB3GRB7 0M1301847
- 1GB3GRB7 3M1301776
- 1GB3GRB7 9M1265639
- 1GB3GRB7 XM1265472
- 1GB3GRB7 7M1227729
- 1GB3GRB7 8M1225908
- 1GB3GRB7 1M1301839
- 1GB3GRB7 3M1213391
- 1GB3GRB7 5M1301813
- 1GB3GRB7 7M1192125
- 1GB3GRB7 6M1227088
- 1GB3GRB7 5M1308177
- 1GB3GRB7 9M1308733
- 1GB3GRB7 2M1301459
- 1GB3GRB7 8M1301871
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 31 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.