Wiring provisions, odometer security (SEO)

Years 1998–02, 2023 Models 6 Factory citations 12

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Also described as Wiring provisions, odometer security

Also documented for GMC

Documented applications

Express — GMT600 (1996–2002)

1998–2002 Factory-verified

GM factory document — 1998 chevrolet express rpo code list, p.1.
GM factory document — 1999 chevrolet express rpo code list, p.1.
GM factory document — 2000 chevrolet express rpo code list, p.1.
GM factory document — 2001 chevrolet express rpo code list, p.1.
GM factory document — 2002 chevrolet express rpo code list, p.1.

Express — GMT610 (2003–2027)

2023 Factory-verified

GM factory document — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.12.

Silverado — GMT800 (1999–2007)

2001 Factory-verified

GM factory document — 2001 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM Heritage factory kit — 2001 Chevrolet Silverado, p.60.

Silverado HD — GMT800 (2001–2007)

2001, 2002 Factory-verified

years from Heritage kit pages, not in GM’s service list of that year: 2002 (kit list)

GM factory document — 2001 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM Heritage factory kit — 2002 Chevrolet Silverado HD, p.45.

Suburban — GMT800 (2000–2006)

2001 Factory-verified

GM factory document — 2001 chevrolet chevy suburban 2wd rpo code list, p.1.

Tahoe — GMT800 (2000–2006)

2001 Factory-verified

GM factory document — 2001 chevrolet tahoe 2wd rpo code list, p.1.

This page aggregates every documented appearance of 8S8 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.