Factory build sheet
2021 GMC Sierra Fleet/Base
Build 1GD48LE7-M · 6.6L 8cyl · Incomplete - Chassis CAB (Double CAB)
VIN positions 1 through 8 read 1GD48LE7 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 1GD48LE7 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 16 of them.
- Decoded Sep 9, 2026
- 16 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
- 4x2
- Brake system
- Hydraulic
Body & chassis
- Body class
- Incomplete - Chassis Cab (Double Cab)
- NHTSA body type
- INCOMPLETE VEHICLE
- Doors
- 4
- Cab type
- Crew/Super Crew/Crew Max
- Series
- 2500
- 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 | 48LE7 | 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 |
16 vehicles carry this build
Every VIN we have decoded to 1GD48LE7-M shares the specification above.
- 16 Known VINs
- 1GD48LE7 XMF176313
- 1GD48LE7 9MF108875
- 1GD48LE7 9MF176030
- 1GD48LE7 5MF108498
- 1GD48LE7 5MF105083
- 1GD48LE7 6MF185624
- 1GD48LE7 7MF108776
- 1GD48LE7 1MF161473
- 1GD48LE7 XMF165182
- 1GD48LE7 5MF176106
- 1GD48LE7 XMF176229
- 1GD48LE7 6MF176762
- 1GD48LE7 XMF176635
- 1GD48LE7 3MF175682
- 1GD48LE7 8MF176052
- 1GD48LE7 5MF176736
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 16 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.