Factory build sheet
2021 GMC Terrain Denali
Build 3GKALSEV-M · 1.5L 4cyl · Front-wheel drive · Sport Utility Vehicle (SUV)
VIN positions 1 through 8 read 3GKALSEV and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every Terrain whose VIN starts 3GKALSEV and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 165 of them.
- Decoded Jul 7, 2026
- 165 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
- 1.5 L
- Cylinders
- 4
- Configuration
- In-Line
- Engine model
- LYX
- Valve train
- Dual Overhead Cam (DOHC)
- Turbocharged
- Yes
- Fuel type
- Gasoline
Drivetrain
- Drive type
- Front-wheel drive
- Transmission
- Automatic
- Forward speeds
- 9
- Brake system
- Hydraulic
Body & chassis
- Body class
- Sport Utility Vehicle (SUV)/Multi-Purpose Vehicle (MPV)
- NHTSA body type
- MULTIPURPOSE PASSENGER VEHICLE (MPV)
- Doors
- 4
- Seats
- 5
- Seat rows
- 2
- Manufacturer
- GENERAL MOTORS LLC
Weight rating
- GVWR class
- Class 1C
- GVWR
- 4,001–5,000 lb
Gross vehicle weight rating is the loaded ceiling set by the manufacturer, not the car's own weight.
Driver assistance, as built
- Forward collision warning Standard
- Crash imminent braking Standard
- Lane departure warning Standard
- Lane keeping assistance Standard
- Adaptive cruise control Optional
- Blind spot warning Standard
Systems the filing does not record are not listed above. Check the window sticker of the exact car before you rely on any single feature.
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 | 3GK | GENERAL MOTORS LLC · World manufacturer identifier |
| 4–8 | ALSEV | 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 |
NHTSA safety ratings
Crash-test results are published per model year and body style, so they cover the 2021 GMC Terrain as a whole rather than this build alone.
Overall
★★★★★ 5 / 5
Frontal crash
★★★★★ 5 / 5
Side crash
★★★★★ 5 / 5
Rollover
★★★★ ★ 4 / 5
2 recall campaigns are recorded for the 2021 Terrain. Recalls are issued per VIN range — check the VIN of the car you are looking at, not the model.
165 vehicles carry this build
Every VIN we have decoded to 3GKALSEV-M shares the specification above.
- 165 Known VINs
- 1 Listed for sale now
Cars are filed by a fixed rule based on the VIN, so a car never moves between groups.
Neighboring configurations
Other factory configurations of the Terrain, 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.
- 2021 SLE 1.5L 4-cyl · Sport utility vehicle suv mult · AWD 7,311 vehicles · $19,183 median
- 2021 SLT 1.5L 4-cyl · Sport utility vehicle suv mult · AWD 9,895 vehicles · $18,995 median
- 2022 SLE 1.5L 4-cyl · Sport utility vehicle suv mult · FWD 14,708 vehicles · $20,069 median
- 2022 SLE 1.5L 4-cyl · Sport utility vehicle suv mult · AWD 14,879 vehicles · $21,356 median
- 2022 AT4 1.5L 4-cyl · Sport utility vehicle suv mult · AWD 5,629 vehicles · $24,437 median
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 165 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.