Factory build sheet
2021 Chevrolet Express 3500 Cutaway
Build 1GB3GSB7-M · 6.6L 8cyl · Rear-wheel drive · Incomplete - Cutaway
VIN positions 1 through 8 read 1GB3GSB7 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 1GB3GSB7 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 35 of them.
- Decoded Jul 7, 2026
- 35 known VINs
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 | 3GSB7 | 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 |
35 vehicles carry this build
Every VIN we have decoded to 1GB3GSB7-M shares the specification above.
- 35 Known VINs
- 1GB3GSB7 XM1306948
- 1GB3GSB7 5M1301866
- 1GB3GSB7 3M1301817
- 1GB3GSB7 3M1306242
- 1GB3GSB7 8M1306365
- 1GB3GSB7 1M1306675
- 1GB3GSB7 4M1307464
- 1GB3GSB7 6M1247672
- 1GB3GSB7 2M1307284
- 1GB3GSB7 XM1306674
- 1GB3GSB7 1M1305946
- 1GB3GSB7 1M1306837
- 1GB3GSB7 2M1306524
- 1GB3GSB7 0M1306070
- 1GB3GSB7 8M1301845
- 1GB3GSB7 0M1305842
- 1GB3GSB7 9M1301854
- 1GB3GSB7 3M1301865
- 1GB3GSB7 9M1305841
- 1GB3GSB7 3M1305947
- 1GB3GSB7 8M1163806
- 1GB3GSB7 XM1301846
- 1GB3GSB7 2M1307138
- 1GB3GSB7 4M1306069
- 1GB3GSB7 1M1306949
- 1GB3GSB7 XM1306366
- 1GB3GSB7 1M1306241
- 1GB3GSB7 3M1306838
- 1GB3GSB7 0M1305677
- 1GB3GSB7 0M1307283
- 1GB3GSB7 0M1301855
- 1GB3GSB7 4M1306525
- 1GB3GSB7 6M1247266
- 1GB3GSB7 9M1305676
- 1GB3GSB7 6M1307465
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 35 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.