Battery, 770 CCA, single (SEO)

Years 1998–03, 2005–07, 2025–26 Models 6 Factory citations 20

Also described as Battery, 770 CCA, singleBattery, single 770 CCA (SEO)Batteries, heavy-duty, triple, 2250 cold-cranking amps

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.

Silverado — GMT800 (1999–2007)

2001, 2005, 2007 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 — 2007 Chevrolet Silverado, p.276.

Silverado HD — GMT800 (2001–2007)

2001–2003, 2005 Factory-verified

years from Heritage kit pages, not in GM’s service list of that year: 2002 (kit list); 2003 (order guide); 2005 (order guide)

GM factory document — 2001 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM Heritage factory kit — 2002 Chevrolet Silverado HD, p.45.
GM Heritage factory kit — 2003 Chevrolet Silverado 2500, p.235.
GM Heritage factory kit — 2005 Chevrolet Silverado 2500HD, p.208.

Silverado Medium Duty (GM515, 2019–2026)

2025–2026 Factory-verified

GM factory document — 2025 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.

Suburban — GMT800 (2000–2006)

2001 Factory-verified

the list prints Batter

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

Tahoe — GMT800 (2000–2006)

2001, 2003, 2005, 2006 Factory-verified

the list prints Batter

GM factory document — 2001 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Tahoe, p.140.
GM Heritage factory kit — 2005 Chevrolet Tahoe, p.141.
GM Heritage factory kit — 2006 Chevrolet Tahoe, p.138.

This page aggregates every documented appearance of 7Y9 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.