Factory build sheet
2021 GMC Sierra Fleet/Base
Build 1GT59SE7-M · 6.6L 8cyl · Four-wheel drive · Pickup
VIN positions 1 through 8 read 1GT59SE7 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 1GT59SE7 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 55 of them.
- Decoded Jul 7, 2026
- 55 known VINs
This configuration is identical to 2021 GMC Sierra Fleet/Base 6.6L 8cyl Pickup (422 vehicles). That page carries the full record.
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
- Pickup
- NHTSA body type
- TRUCK
- 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.
The same build, other model years
GMC used the VIN pattern 1GT59SE7 for 4 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.
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 | 1GT | 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 |
55 vehicles carry this build
Every VIN we have decoded to 1GT59SE7-M shares the specification above.
- 55 Known VINs
- 1GT59SE7 7MF284825
- 1GT59SE7 6MF241738
- 1GT59SE7 XMF267033
- 1GT59SE7 6MF252352
- 1GT59SE7 6MF271287
- 1GT59SE7 0MF241850
- 1GT59SE7 7MF263795
- 1GT59SE7 XMF151542
- 1GT59SE7 7MF257284
- 1GT59SE7 7MF200521
- 1GT59SE7 2MF156783
- 1GT59SE7 8MF284560
- 1GT59SE7 8MF242261
- 1GT59SE7 9MF267878
- 1GT59SE7 7MF272576
- 1GT59SE7 9MF115017
- 1GT59SE7 0MF257434
- 1GT59SE7 8MF151300
- 1GT59SE7 7MF257012
- 1GT59SE7 6MF241724
- 1GT59SE7 0MF241640
- 1GT59SE7 0MF266229
- 1GT59SE7 5MF284256
- 1GT59SE7 2MF280195
- 1GT59SE7 9MF273454
- 1GT59SE7 6MF272665
- 1GT59SE7 XMF202053
- 1GT59SE7 XMF220178
- 1GT59SE7 XMF250779
- 1GT59SE7 0MF242478
- 1GT59SE7 XMF289615
- 1GT59SE7 9MF255729
- 1GT59SE7 2MF267933
- 1GT59SE7 1MF285436
- 1GT59SE7 4MF273541
- 1GT59SE7 6MF272004
- 1GT59SE7 0MF279112
- 1GT59SE7 8MF262574
- 1GT59SE7 7MF257155
- 1GT59SE7 7MF267913
- 1GT59SE7 2MF241686
- 1GT59SE7 1MF243008
- 1GT59SE7 6MF270107
- 1GT59SE7 1MF217380
- 1GT59SE7 1MF228136
- 1GT59SE7 0MF296010
- 1GT59SE7 8MF183776
- 1GT59SE7 8MF102890
- 1GT59SE7 2MF200605
- 1GT59SE7 3MF270131
- 1GT59SE7 7MF272030
- 1GT59SE7 4MF267982
- 1GT59SE7 XMF286780
- 1GT59SE7 3MF272560
- 1GT59SE7 XMF241077
Neighboring configurations
Other factory configurations of the Sierra, each with its own build sheet. The set is fixed by the VIN patterns themselves, so it does not shuffle as prices or inventory move.
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 55 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.