Factory build sheet
2021 GMC Sierra Fleet/Base
Build 1GD39SE7-M · 6.6L 8cyl · Four-wheel drive · Incomplete - Chassis CAB (Single CAB)
VIN positions 1 through 8 read 1GD39SE7 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 1GD39SE7 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 68 of them.
- Decoded Jul 7, 2026
- 68 known VINs
- 2 listed for sale now
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 (Single Cab)
- NHTSA body type
- INCOMPLETE VEHICLE
- Doors
- 2
- 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 | 39SE7 | 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 |
68 vehicles carry this build
Every VIN we have decoded to 1GD39SE7-M shares the specification above.
- 68 Known VINs
- 2 Listed for sale now
- 1GD39SE7 3MF269225
- 1GD39SE7 0MF251197
- 1GD39SE7 8MF156032
- 1GD39SE7 2MF264081
- 1GD39SE7 6MF137639
- 1GD39SE7 5MF251700
- 1GD39SE7 8MF249746
- 1GD39SE7 7MF244974
- 1GD39SE7 3MF255647
- 1GD39SE7 9MF281508
- 1GD39SE7 1MF262774
- 1GD39SE7 8MF263694
- 1GD39SE7 8MF262626
- 1GD39SE7 1MF151030
- 1GD39SE7 6MF279991
- 1GD39SE7 7MF188549
- 1GD39SE7 2MF244641
- 1GD39SE7 0MF137829
- 1GD39SE7 7MF251245
- 1GD39SE7 4MF263983
- 1GD39SE7 8MF263775
- 1GD39SE7 9MF186348
- 1GD39SE7 9MF126439
- 1GD39SE7 3MF243417
- 1GD39SE7 7MF171900
- 1GD39SE7 XMF296096
- 1GD39SE7 XMF187573
- 1GD39SE7 9MF129177
- 1GD39SE7 6MF251219
- 1GD39SE7 8MF241078
- 1GD39SE7 1MF186568
- 1GD39SE7 1MF188496
- 1GD39SE7 4MF280685
- 1GD39SE7 1MF131005
- 1GD39SE7 4MF257598
- 1GD39SE7 3MF249122
- 1GD39SE7 1MF248874
- 1GD39SE7 5MF262387
- 1GD39SE7 1MF281728
- 1GD39SE7 5MF264253
- 1GD39SE7 1MF315490
- 1GD39SE7 6MF257845
- 1GD39SE7 5MF251924
- 1GD39SE7 2MF171738
- 1GD39SE7 0MF258120
- 1GD39SE7 0MF262720
- 1GD39SE7 7MF243226
- 1GD39SE7 4MF262641
- 1GD39SE7 4MF281741
- 1GD39SE7 0MF281249
- 1GD39SE7 3MF230974
- 1GD39SE7 2MF302456
- 1GD39SE7 5MF295468
- 1GD39SE7 6MF315310
- 1GD39SE7 7MF173730
- 1GD39SE7 6MF183956
- 1GD39SE7 9MF297546
- 1GD39SE7 0MF264161
- 1GD39SE7 5MF184256
- 1GD39SE7 0MF276925
- 1GD39SE7 4MF249226
- 1GD39SE7 7MF217774
- 1GD39SE7 2MF190225
- 1GD39SE7 0MF171933
- 1GD39SE7 6MF258106
- 1GD39SE7 2MF257650
- 1GD39SE7 1MF243092
- 1GD39SE7 4MF190324
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 68 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.