Factory build sheet
2016 GMC Sierra Fleet/Base
Build 1GD21VEG-G · 6L 8cyl · Rear-wheel drive · Incomplete - Chassis CAB (Double CAB)
VIN positions 1 through 8 read 1GD21VEG and position 10 reads G. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every Sierra whose VIN starts 1GD21VEG and carries G in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 2 of them.
- Decoded Jul 7, 2026
- 2 known VINs
Factory specification
As filed by GMC 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 L
- Cylinders
- 8
- Engine model
- L96 - Flexible Fuel (Gas/Ethanol), SFI IRON
- Engine manufacturer
- GM
- Fuel type
- Gasoline
Drivetrain
- Drive type
- Rear-wheel drive
- Brake system
- Hydraulic
Body & chassis
- Body class
- Incomplete - Chassis Cab (Double Cab)
- NHTSA body type
- INCOMPLETE VEHICLE
- Doors
- 4
- Cab type
- Extra/Super/Quad/Double/King/Extended
- Series
- 3500
- Manufacturer
- GENERAL MOTORS LLC
Weight rating
- GVWR class
- Class 2H
- GVWR
- 9,001–10,000 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 | 1GD | GENERAL MOTORS LLC · World manufacturer identifier |
| 4–8 | 21VEG | Model, body style, engine and restraint system |
| 9 | × | Check digit — computed per vehicle, not part of the build |
| 10 | G | Model year — 2016 |
| 11 | × | Assembly plant |
| 12–17 | ×××××× | Production sequence number, unique to each vehicle |
2 vehicles carry this build
Every VIN we have decoded to 1GD21VEG-G shares the specification above.
- 2 Known VINs
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 2 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.