Factory build sheet
2012 GMC Heavy Conventional 116 IN. BBC Heavy Conventional Aluminum
Build 1GTW7FBA-C · 5.7L 8cyl
VIN positions 1 through 8 read 1GTW7FBA and position 10 reads C. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every Heavy Conventional whose VIN starts 1GTW7FBA and carries C in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 48 of them.
- Decoded Jul 7, 2026
- 48 known VINs
- 2 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
- 5.7 L
- Displacement (CI)
- 350
- Cylinders
- 8
- Configuration
- V-Shaped
- Engine manufacturer
- GM
- Fuel type
- Gasoline
Body & chassis
- NHTSA body type
- TRUCK
- Cab type
- MDHD: Conventional
- Series
- 7000 Medium Duty
- Manufacturer
- GENERAL MOTORS LLC
Weight rating
- GVWR class
- Class 8
- GVWR
- 33,001 lb or less
Gross vehicle weight rating is the loaded ceiling set by the manufacturer, not the car's own weight.
The same build, other model years
GMC used the VIN pattern 1GTW7FBA for 4 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.
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 | 1GT | GENERAL MOTORS LLC · World manufacturer identifier |
| 4–8 | W7FBA | Model, body style, engine and restraint system |
| 9 | × | Check digit — computed per vehicle, not part of the build |
| 10 | C | Model year — 2012 |
| 11 | × | Assembly plant |
| 12–17 | ×××××× | Production sequence number, unique to each vehicle |
48 vehicles carry this build
Every VIN we have decoded to 1GTW7FBA-C shares the specification above.
- 48 Known VINs
- 2 Listed for sale now
- 1GTW7FBA 8C1179658
- 1GTW7FBA XC1148816
- 1GTW7FBA 3C1200948
- 1GTW7FBA 7C1154508
- 1GTW7FBA 5C1103797
- 1GTW7FBA 4C1130120
- 1GTW7FBA 5C1114508
- 1GTW7FBA 3C1199686
- 1GTW7FBA 8C1190627
- 1GTW7FBA 9C1155157
- 1GTW7FBA 1C1113517
- 1GTW7FBA 6C1152877
- 1GTW7FBA 3C1112739
- 1GTW7FBA 3C1190762
- 1GTW7FBA 0C1116974
- 1GTW7FBA 9C1175358
- 1GTW7FBA 0C1128722
- 1GTW7FBA 2C1114594
- 1GTW7FBA XC1189981
- 1GTW7FBA 5C1112029
- 1GTW7FBA XC1110423
- 1GTW7FBA 2C1144923
- 1GTW7FBA XC1100393
- 1GTW7FBA 6C1191808
- 1GTW7FBA 6C1178315
- 1GTW7FBA XC1188815
- 1GTW7FBA 5C1108210
- 1GTW7FBA 4C1101202
- 1GTW7FBA 7C1104871
- 1GTW7FBA XC1168340
- 1GTW7FBA 7C1170756
- 1GTW7FBA 6C1150370
- 1GTW7FBA 1C1151572
- 1GTW7FBA 1C1166542
- 1GTW7FBA 6C1150045
- 1GTW7FBA 2C1117589
- 1GTW7FBA 4C1190740
- 1GTW7FBA 2C1105247
- 1GTW7FBA XC1176051
- 1GTW7FBA 3C1120145
- 1GTW7FBA 5C1152403
- 1GTW7FBA 6C1126747
- 1GTW7FBA 2C1148518
- 1GTW7FBA 4C1104262
- 1GTW7FBA 4C1156894
- 1GTW7FBA 0C1168573
- 1GTW7FBA 6C1101251
- 1GTW7FBA 6C1107809
Neighboring configurations
Other factory configurations of the Heavy Conventional, 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.
- 2012 116 IN. BBC Heavy Conventional Aluminum 8.2L 8-cyl 36 vehicles
- 2013 116 IN. BBC Heavy Conventional Aluminum 5.7L 8-cyl 43 vehicles
- 2013 116 IN. BBC Heavy Conventional Aluminum 5.7L 8-cyl 221 vehicles · $12,995 median
- 2014 116 IN. BBC Heavy Conventional Aluminum 5.7L 8-cyl 78 vehicles · $14,578 median
- 2015 92.5 IN. BBC Heavy Conventional Steel 5.7L 8-cyl · 4WD 27 vehicles
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 48 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.