Factory build sheet
1991 Chevrolet GMT-400 C1500
Build 1GCDC14H-M · 5L 8cyl · Pickup
VIN positions 1 through 8 read 1GCDC14H and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every GMT-400 whose VIN starts 1GCDC14H and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 105 of them.
- Decoded Jul 7, 2026
- 105 known VINs
- 2 listed for sale now
Factory specification
As filed by Chevrolet 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
- 5 L
- Cylinders
- 8
- Configuration
- V-Shaped
- Engine manufacturer
- CPC
- Fuel type
- Gasoline
Drivetrain
- Drive type
- 4x2
- Brake system
- Hydraulic
Body & chassis
- Body class
- Pickup
- NHTSA body type
- TRUCK
- Doors
- 2
- Series
- 1/2 Ton Nominal
- Manufacturer
- GENERAL MOTORS LLC
Weight rating
- GVWR class
- Class 1D
- GVWR
- 5,001–6,000 lb
Gross vehicle weight rating is the loaded ceiling set by the manufacturer, not the car's own weight.
The same build, other model years
Chevrolet used the VIN pattern 1GCDC14H for 8 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.
- 1981 5L 8cyl Pickup · 54 vehicles code B
- 1982 5L 8cyl Pickup · 71 vehicles code C
- 1983 5L 8cyl Pickup · 100 vehicles code D $21,000
- 1984 5L 8cyl Pickup · 208 vehicles code E $39,990
- 1985 5L 8cyl Pickup · 245 vehicles code F $33,050
- 1986 5L 8cyl Pickup · 256 vehicles code G $29,850
- 1988 C1500 5L 8cyl Pickup · 172 vehicles code J
-
1991 You are here code M
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 | 1GC | GENERAL MOTORS LLC · World manufacturer identifier |
| 4–8 | DC14H | Model, body style, engine and restraint system |
| 9 | × | Check digit — computed per vehicle, not part of the build |
| 10 | M | Model year — 1991 |
| 11 | × | Assembly plant |
| 12–17 | ×××××× | Production sequence number, unique to each vehicle |
105 vehicles carry this build
Every VIN we have decoded to 1GCDC14H-M shares the specification above.
- 105 Known VINs
- 2 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 GMT-400, 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.
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 105 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.