Floor mats, color-keyed and carpeted rear

Years 1987, 2004–07, 2014, 2018–19, 2025–27 Models 4 Factory citations 8

Also described as Floor mats, carpeted, color-keyed, rearCovering, rear floor mats, auxiliaryFloor mats, rear, carpet savers

Also documented for Cadillac Chevrolet GMC Hummer Oldsmobile

Documented applications

Encore — Gamma II (2013–2022)

2014, 2018–2019 Factory-verified

2014: all trims: S; 2018–2019: all trims but Encore 1SV: S

GM factory document — 2014 buick encore fleet order guide wayback, p.2.
GM factory document — 2018 buick encore order guide copy gm authority, p.2, p.16.
GM factory document — 2019 buick encore order guide copy gm authority, p.2, p.14.

Encore GX — VSS-F (2020–2027)

2025–2027 Factory-verified

Preferred, Sport Touring, Avenir: S

GM factory document — 2025 buick encore gx fleet order guide, p.2.
GM factory document — 2026 buick encore gx fleet order guide, p.2.
GM factory document — 2027 buick encore gx fleet order guide, p.2.

Rainier — GMT360 (2004–2007)

2004–2007 Factory-verified

GM factory document — 2004 buick rainier 2wd rpo code list, p.1.
GM factory document — 2007 buick rainier rpo code list, p.1.

Regal — G-body (1983–1987)

1987 Confirmed

gnttype.org's 1987 option sheet

This page aggregates every documented appearance of B33 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.