Batteries, 770 CCA and 600 CCA (dual) (SEO)

Years 2001–03, 2005–06 Models 5 Factory citations 12

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Also described as Battery, 600 CCA and 770 CCA, dualBatteries, 600 CCA and 770 CCA, dual (SEO)

Also documented for GMC

Documented applications

Express — GMT600 (1996–2002)

2001–2002 Factory-verified

the 2001–2002 lists print 8BO, a letter O; GM's other lists print 8B0 for the same battery

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

Silverado — GMT800 (1999–2007)

2001, 2005–2006 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.
GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196.
GM Heritage factory kit — 2006 Chevrolet Silverado, p.269.

Silverado HD — GMT800 (2001–2007)

2001, 2003, 2005 Factory-verified

years from Heritage kit pages, not in GM’s service list of that year: 2003 (order guide); 2005 (order guide)

GM factory document — 2001 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Silverado 2500, p.235.
GM Heritage factory kit — 2005 Chevrolet Silverado 2500HD, p.208.

Suburban — GMT800 (2000–2006)

2001 Factory-verified

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

Tahoe — GMT800 (2000–2006)

2001–2002 Factory-verified

2002 comes from the 2003 Tahoe Special Service Vehicle kit change notes (p.177), which list "SEO (8B0) Dual batteries" among the 2003 deletions

GM factory document — 2001 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Tahoe, p.177.

This page aggregates every documented appearance of 8B0 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.