Factory build sheet
2021 GMC Sierra Fleet/Base
Build 1GD18LE7-M · 6.6L 8cyl · Incomplete - Chassis CAB (Double CAB)
VIN positions 1 through 8 read 1GD18LE7 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 1GD18LE7 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 44 of them.
- Decoded Jul 7, 2026
- 44 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 2H
- GVWR
- 9,001–10,000 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 | 18LE7 | 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 |
44 vehicles carry this build
Every VIN we have decoded to 1GD18LE7-M shares the specification above.
- 44 Known VINs
- 1GD18LE7 8MF106053
- 1GD18LE7 4MF190727
- 1GD18LE7 3MF191111
- 1GD18LE7 2MF193383
- 1GD18LE7 2MF107876
- 1GD18LE7 XMF105387
- 1GD18LE7 2MF221070
- 1GD18LE7 7MF223302
- 1GD18LE7 9MF221566
- 1GD18LE7 8MF149758
- 1GD18LE7 4MF193823
- 1GD18LE7 3MF193165
- 1GD18LE7 1MF195402
- 1GD18LE7 8MF193548
- 1GD18LE7 9MF192411
- 1GD18LE7 9MF193946
- 1GD18LE7 4MF107975
- 1GD18LE7 3MF108177
- 1GD18LE7 0MF194662
- 1GD18LE7 4MF191683
- 1GD18LE7 1MF107108
- 1GD18LE7 2MF106338
- 1GD18LE7 9MF103064
- 1GD18LE7 4MF105224
- 1GD18LE7 5MF105183
- 1GD18LE7 2MF221134
- 1GD18LE7 4MF195572
- 1GD18LE7 9MF106501
- 1GD18LE7 4MF103747
- 1GD18LE7 0MF191857
- 1GD18LE7 5MF108276
- 1GD18LE7 7MF195324
- 1GD18LE7 6MF174416
- 1GD18LE7 XMF107351
- 1GD18LE7 1MF195495
- 1GD18LE7 3MF107613
- 1GD18LE7 8MF108238
- 1GD18LE7 8MF195431
- 1GD18LE7 5MF107774
- 1GD18LE7 7MF174568
- 1GD18LE7 5MF195600
- 1GD18LE7 0MF223772
- 1GD18LE7 4MF175581
- 1GD18LE7 7MF105671
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 44 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.