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; special equipment option (SEO); allows an aftermarket back-up alarm; needs a fleet or government order type; WT: O; LT, Trail Boss, Z71, ZR2: not offered
SFW Factory-verified
Also documented for GMC
Documented applications
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lets an aftermarket back-up alarm be installed by disabling rear perimeter lighting; the 2026 guide marks it no longer available to order; 2025: A in 2WT, 5WT, 8WT; not offered in 3LT, 2SP, 3SP; 2026: A in 4WT, 5WT, 8WT; not offered in 2LT, 3LT, 4LT, 2TR, 3TR, 2SP, 3SP
This page aggregates every documented appearance of SFW in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.