21J ✓ Factory-verified

Buick · Regular Production Option

Convertible top color, Malbec

Years 2018–19 Models 1 Factory citations 2

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Documented applications

Cascada — Delta II (2016–2019) →

• 2018–2019 ✓ Factory-verified

  1SP: O; requires 4AA with G0Y, GAZ or GB9 paint, or 4CG with GAZ or GB9 paint (2018) or G0Y paint (2019); the 2018 colour-and-trim matrix shows 21J with 4CG only on G0Y

  ⛭ GM factory document — 2018 buick cascada order guide copy gm authority, p.7, p.13, p.17.

  ⛭ GM factory document — 2019 buick cascada order guide copy gm authority, p.7, p.13, p.17.

Related codes · mentioned in these notes

1SP4AA4CGG0YGAZGB9

This page aggregates every documented appearance of 21J in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.