Factory build sheet
2021 GMC Sierra SLE
Build 1GT59TEY-M · 6.6L 8cyl · Four-wheel drive · Pickup
VIN positions 1 through 8 read 1GT59TEY 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 1GT59TEY 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 Sep 9, 2026
- 36 known VINs
- 1 listed for sale now
This configuration is identical to 2021 GMC Sierra SLE 6.6L 8cyl Pickup (89 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
- Configuration
- V-Shaped
- Engine model
- L5P - DI, DURAMAX, GEN 5 VAR. 1
- Turbocharged
- Yes
- Fuel type
- Diesel
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 1GT59TEY 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 | 59TEY | 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 1GT59TEY-M shares the specification above.
- 36 Known VINs
- 1 Listed for sale now
- 1GT59TEY XMF300014
- 1GT59TEY 8MF205743
- 1GT59TEY 7MF282345
- 1GT59TEY 4MF315723
- 1GT59TEY 3MF286196
- 1GT59TEY 9MF237245
- 1GT59TEY 6MF262622
- 1GT59TEY 6MF299444
- 1GT59TEY 8MF170380
- 1GT59TEY 8MF293998
- 1GT59TEY 9MF299261
- 1GT59TEY 3MF256163
- 1GT59TEY 6MF242645
- 1GT59TEY 9MF292441
- 1GT59TEY 9MF300487
- 1GT59TEY 3MF294072
- 1GT59TEY 5MF302267
- 1GT59TEY 4MF313504
- 1GT59TEY 3MF310867
- 1GT59TEY 0MF298306
- 1GT59TEY 5MF275961
- 1GT59TEY 6MF299007
- 1GT59TEY 7MF285942
- 1GT59TEY 3MF304132
- 1GT59TEY 9MF180108
- 1GT59TEY 1MF310043
- 1GT59TEY 1MF286990
- 1GT59TEY 4MF303989
- 1GT59TEY 1MF230225
- 1GT59TEY 5MF252082
- 1GT59TEY 6MF218684
- 1GT59TEY 7MF298691
- 1GT59TEY 0MF302726
- 1GT59TEY 0MF276824
- 1GT59TEY 0MF197444
- 1GT59TEY 3MF259127
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 36 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.