1G4Buick passenger cars
Held by General Motors LLC · registered in the United States
WMI 1G4 names 16 models, more than any of the other eight WMIs that decode Buick. It shares most of its model list with two other codes. Its rules place assembly in four countries. The same rules run from model year 1981 to 2019, with nothing after 2019.
Models in the decoding rules, by model year
- Century1981–2005
- Electra1981–1990
- LeSabre1981–2005
- Regal1981–2014
- Riviera1981–1999
- Skyhawk1981–1990
- Skylark1981–1998
- Somerset1985–1987
- Reatta1988–1991
- Coachbuilder1990–1996
- Roadmaster1990–1996
- Park Avenue1991–2005
- Allure2005–2009
- LaCrosse2005–2019
- Lucerne2006–2011
- Verano2012–2017
Where the rules place assembly
Plant countriesUnited States, Canada, Mexico, Australia
Plant locations namedKansas City; Orion; Bowling Green; Lordstown; Lansing - Grand River; Wilmington; Spring Hill; Hamtramck; Oklahoma City; Lansing - North Plant; Flint; Lansing - Craft Center; Detroit Hamtramck; Doraville and 22 more
Bodies and power
Body classesSedan, Coupe, Wagon, Convertible, Hatchback, SUV, Incomplete - Commercial Chassis
Primary fuelsGasoline, Flexible Fuel Vehicle (FFV), Electric, Diesel, Compressed Natural Gas (CNG)
Electrified versionsBattery electric, Hybrid, Mild hybrid, Plug-in hybrid
Codes with largely the same models
These codes have no page of their own: at least half of the models in their rules also appear under 1G4. The last column counts the shared models.
| Code | Holder | Vehicle type | Model years | Shared models |
|---|---|---|---|---|
| 2G4 | General Motors LLC | passenger cars | 1981–2017 | 16 of 16 |
| 3G4 | General Motors LLC | passenger cars | 1985–2010 | 15 of 15 |
Compared with the closest code, W04
W04 is held by Adam Opel AG. Measured by the overlap of the two model lists, it is the code closest to 1G4 apart from those listed above.
Models in both3
Only under 1G4Century, Electra, LeSabre, Riviera, Skyhawk, Skylark, Somerset, Reatta, Coachbuilder, Roadmaster, Park Avenue, Allure, Verano
Only under W04Cascada, Regal TourX
Model years1G4: 1981–2019 · W04: 2011–2020
Plant countries only for 1G4United States, Australia
Plant countries only for W04Germany, Poland, Belgium, South Korea
Body classes only for 1G4Coupe, Hatchback, SUV, Incomplete - Commercial Chassis
Other codes held by General Motors
| Code | Vehicle type | Makes | Model years | Models |
|---|---|---|---|---|
| 1G1 | passenger cars | Chevrolet | 1981–open | 39 |
| 2G1 | passenger cars | Chevrolet | 1981–2020 | 34 |
| 3G1 | passenger cars | Chevrolet | 1985–2024 | 34 |
| 1G2 | passenger cars | Pontiac | 1981–2010 | 30 |
| 1G8 | passenger cars | Saturn | 1981–2010 | 30 |
| 2G2 | passenger cars | Pontiac | 1981–2010 | 30 |
| 3G2 | passenger cars | Pontiac | 1985–2010 | 26 |
| KL2 | passenger cars | Pontiac | 1985–2010 | 26 |
97 more not shown here. All 108 codes of General Motors
Buick under other holders
Models named in each code's rules
Source: NHTSA vPIC, October 2026 release (database updated October 17, 2026). How the figures are counted: How the catalog is read.