Two ranges under one badge
In North America Buick has narrowed to crossovers — Encore, Envision, Enclave — after decades of sedans including LaCrosse, Regal and Verano. In China, where Buick sells in far greater volume, the range is broader and includes models with no North American equivalent at all.
A nameplate shared across both markets does not guarantee a shared vehicle. The VIN carries the build market, which is what resolves the question before a diagram opens.
Platform sharing across GM
Buick models sit on platforms shared with Chevrolet and Opel: the Encore has shared architecture with the Chevrolet Trax, and the Regal of the last generation was closely related to the Opel Insignia. On shared components the part number is the same across the badges.
That is the practical reason the GM brands share one catalog rather than four — the parts genuinely are shared, and duplicating the data by badge would only hide that.
GM numbering and older models
GM part numbers are eight flat digits with no readable group structure, so the diagram carries the identification. Buick's long history means many parts have been through several numbering generations; the catalog maps them forward, and following the chain to its end is what produces the current number.
Common Buick nameplates
These nameplates help you find the right vehicle family. Confirm the exact model, market and production period against the active catalog before quoting a part:
| Model | Production years |
|---|---|
| Buick Encore | — |
| Buick Enclave | — |
| Buick Envision | — |
Frequently asked questions
Does the catalog cover Chinese-market Buicks?
The VIN resolves the build market, so vehicles built for markets outside North America are identified by their own build record rather than by a shared nameplate.
Does Buick share parts with Chevrolet and Opel?
On shared platforms, yes — the Encore with the Chevrolet Trax, the last-generation Regal with the Opel Insignia. Shared components carry one number.
How far back does coverage go?
Historic model data is retained, with supersession chains mapping older numbering generations forward to current numbers.