Factory build sheet
2021 GMC Sierra Fleet/Base
Build 1GD59SE7-M · 6.6L 8cyl · Four-wheel drive · Incomplete - Chassis CAB (Double CAB)
VIN positions 1 through 8 read 1GD59SE7 and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every Sierra whose VIN starts 1GD59SE7 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 36 of them.
- Decoded Jul 7, 2026
- 36 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
- 6.6 L
- Cylinders
- 8
- Engine model
- L8T - SIDI, VVT, CAST IRON
- Fuel type
- Gasoline
Drivetrain
- Drive type
- Four-wheel drive
- Brake system
- Hydraulic
Body & chassis
- Body class
- Incomplete - Chassis Cab (Double Cab)
- NHTSA body type
- INCOMPLETE VEHICLE
- Cab type
- Extra/Super/Quad/Double/King/Extended
- Series
- 3500
- 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 | 1GD | GENERAL MOTORS LLC · World manufacturer identifier |
| 4–8 | 59SE7 | 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 |
36 vehicles carry this build
Every VIN we have decoded to 1GD59SE7-M shares the specification above.
- 36 Known VINs
- 1GD59SE7 2MF249928
- 1GD59SE7 5MF241029
- 1GD59SE7 7MF236995
- 1GD59SE7 3MF251056
- 1GD59SE7 8MF232955
- 1GD59SE7 1MF188541
- 1GD59SE7 6MF217788
- 1GD59SE7 5MF220441
- 1GD59SE7 7MF193503
- 1GD59SE7 7MF246393
- 1GD59SE7 0MF198137
- 1GD59SE7 2MF233552
- 1GD59SE7 1MF251752
- 1GD59SE7 9MF276334
- 1GD59SE7 1MF192556
- 1GD59SE7 0MF232903
- 1GD59SE7 6MF248359
- 1GD59SE7 XMF219723
- 1GD59SE7 6MF217189
- 1GD59SE7 1MF218220
- 1GD59SE7 8MF257936
- 1GD59SE7 7MF193386
- 1GD59SE7 9MF218241
- 1GD59SE7 4MF202979
- 1GD59SE7 5MF257988
- 1GD59SE7 9MF246654
- 1GD59SE7 8MF258066
- 1GD59SE7 5MF200187
- 1GD59SE7 8MF214567
- 1GD59SE7 XMF258053
- 1GD59SE7 7MF246944
- 1GD59SE7 5MF215238
- 1GD59SE7 3MF250554
- 1GD59SE7 4MF108715
- 1GD59SE7 4MF208426
- 1GD59SE7 7MF172814
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 36 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.