LPO, wheel locks, black Thatcham, 4 locks and 1 key

Years 2023, 2025–27 Models 2 Factory citations 4

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Also described as LPO, black lug nut and wheel lock kit

Also documented for Cadillac Chevrolet GMC

Documented applications

Enclave — C1XX (2018–2024)

2023 Factory-verified

dealer-installed; 2023: all trims: O; not in the 2022 guide, whose update log removed a Thatcham wheel-lock LPO, SQU, on 7/5/2021; GM Authority's 2023 changes page calls SPZ a 2022 black lug nut and wheel lock kit replaced for 2023, which the guides do not bear out

GM factory document — 2023 buick enclave order guide copy autoevolution wayback, p.13, p.27.

Enclave — VSS-S (2025–2027)

2025–2027 Factory-verified

O on all trims; includes 20 lug nuts, 4 locks and 1 key

GM factory document — 2025 buick all new enclave fleet order guide, p.12.
GM factory document — 2026 buick enclave fleet order guide, p.12.
GM factory document — 2027 buick enclave fleet order guide, p.13.

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