Factory build sheet
2021 GMC Sierra Fleet/Base
Build 1GD49LE7-M · 6.6L 8cyl · Four-wheel drive · Incomplete - Chassis CAB (Double CAB)
VIN positions 1 through 8 read 1GD49LE7 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 1GD49LE7 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 38 of them.
- Decoded Jul 7, 2026
- 38 known VINs
- 1 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 (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 | 49LE7 | 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 |
38 vehicles carry this build
Every VIN we have decoded to 1GD49LE7-M shares the specification above.
- 38 Known VINs
- 1 Listed for sale now
- 1GD49LE7 0MF194770
- 1GD49LE7 4MF191175
- 1GD49LE7 XMF185073
- 1GD49LE7 9MF198154
- 1GD49LE7 6MF197415
- 1GD49LE7 1MF159123
- 1GD49LE7 2MF178831
- 1GD49LE7 9MF194430
- 1GD49LE7 5MF191430
- 1GD49LE7 9MF176817
- 1GD49LE7 XMF199197
- 1GD49LE7 4MF222327
- 1GD49LE7 XMF178480
- 1GD49LE7 6MF194773
- 1GD49LE7 1MF178836
- 1GD49LE7 3MF194505
- 1GD49LE7 6MF178606
- 1GD49LE7 1MF198617
- 1GD49LE7 5MF153485
- 1GD49LE7 1MF178741
- 1GD49LE7 7MF151706
- 1GD49LE7 4MF176983
- 1GD49LE7 0MF178732
- 1GD49LE7 XMF184893
- 1GD49LE7 8MF197707
- 1GD49LE7 8MF176808
- 1GD49LE7 3MF223548
- 1GD49LE7 3MF196352
- 1GD49LE7 7MF221818
- 1GD49LE7 4MF151677
- 1GD49LE7 XMF178818
- 1GD49LE7 2MF178179
- 1GD49LE7 3MF196609
- 1GD49LE7 3MF178806
- 1GD49LE7 2MF223573
- 1GD49LE7 XMF176941
- 1GD49LE7 0MF127439
- 1GD49LE7 1MF185284
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 38 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.