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2021 GMC Sierra SLT specifications
Build 1GT48SE7-M · 6.6L 8cyl · Pickup
Explore the specifications recorded for VIN pattern 1GT48SE7-M. Start here to understand this version, then check the full VIN for an individual car.
NHTSA vPIC decode · Pattern-level specifications
- Decoded Sep 9, 2026
- 1 known VINs
- Engine
- 6.6L 8cyl
- Body
- Pickup, 4-door
- Weight class
- Class 3
The essentials, explained
Engine, transmission & body specifications
As filed by GMC with NHTSA for this VIN pattern. 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
- Pickup
- NHTSA body type
- TRUCK
- Doors
- 4
- Cab type
- Crew/Super Crew/Crew Max
- 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.
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.
VIN positions 1 through 8 read 1GT48SE7 and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 describe the check digit, assembly plant and production sequence; they are not part of this pattern.
| Positions | Characters | What they encode |
|---|---|---|
| 1–3 | 1GT | GENERAL MOTORS LLC · World manufacturer identifier |
| 4–8 | 48SE7 | 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 |
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Manufacturer reference library
Manuals & reference documents
2021 GMC Sierra PDF Brochure
2021 · US · Model-year brochure. Equipment can vary by vehicle.
Open manufacturer document ↗Documents may cover multiple versions. Check applicability to the individual vehicle; documents load only when opened.
Explore actual vehicles
1 known VINs for this pattern
Every VIN we have decoded to 1GT48SE7-M is associated with this pattern in our records. Shared specifications do not mean shared history, condition or installed options.
- 1 Known VINs
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Useful answers, without the guesswork
2021 GMC Sierra: specification questions
What engine code is recorded for 1GT48SE7-M?
The recorded engine model is L8T - SIDI, VVT, CAST IRON. This is pattern-level data; confirm the installed engine on a vehicle that may have been modified.
Is this an original window sticker?
No. This page summarizes decoded VIN-pattern specifications. An original sticker or build record is needed to verify the optional equipment of a particular car.
Are the known VINs a production total?
No. These are VINs observed in our records. The count does not establish total production or rarity.
Does a missing specification mean the feature is absent?
No. Missing fields mean that a value is not recorded in this decode. Check the individual vehicle and its manufacturer documentation.
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 1 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.
About the NHTSA vPIC data source ↗
Pattern decode updated September 9, 2026.