Convenience package, decor level #3

Years 1963–79, 1982–89, 1991–92, 1994–09 Models 7 Factory citations 49

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Also described as Differential carrierTrim package, SportConvenience package, decor level 3

Also documented for Buick GMC Hummer Oldsmobile

Documented applications

Impala / Full-Size

1963–70s (varies) Single-source

3.55 posi

S-10 Blazer — First generation (1983–1994)

1983–1989, 1991–1992 Factory-verified

the kits print it as Sport/Gypsy equipment, with ZY7 sport two-tone paint; not in the 1994 trim levels; the merged second-generation doc reads YC3 from GM lists as decor level 3; the joint S-10 Blazer and S-15 Jimmy pages print Sport/Gypsy; the Chevrolet-only order guides (1984 p.21, 1985 p.30) print Sport

GM Heritage factory kit — 1983 Chevrolet S 10 Blazer, p.17.
GM Heritage factory kit — 1984 Chevrolet S 10 Blazer, p.5.
GM Heritage factory kit — 1984 Chevrolet S 10 Blazer, p.21.
GM Heritage factory kit — 1985 Chevrolet S 10 Blazer, p.30.
GM Heritage factory kit — 1986 Chevrolet S 10 Blazer, p.5.
GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.41.
GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.5.
GM Heritage factory kit — 1989 Chevrolet Blazer, p.18.
GM Heritage factory kit — 1991 Chevrolet S 10 Blazer, p.18.
GM Heritage factory kit — 1992 Chevrolet S 10 Blazer, p.20.

Blazer — S-10 second generation (1995–2005)

1995–2004 Factory-verified

GM factory document — 1998 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2003 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet blazer 4wd rpo code list, p.1.
GM Heritage factory kit — 1995 Chevrolet S 10 Blazer, p.5.
GM Heritage factory kit — 1996 Chevrolet S 10 Blazer, p.4.
GM Heritage factory kit — 1997 Chevrolet S 10 Blazer, p.8.
GM Heritage factory kit — 1998 Chevrolet S 10 Blazer, p.7.
GM Heritage factory kit — 1999 Chevrolet S 10 Blazer, p.31.

Colorado — GMT355 (2004–2012)

2004–2009 Factory-verified

the 2005 and 2006 lists print decor level #2.

GM factory document — 2004 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2007 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet colorado pickup 2wd rpo code list, p.1.

S-10 pickup — First generation (1982–1993)

1982–1988 Factory-verified

the kits print it as Sport equipment; the 1982 page offers it only with ZY7 sport two-tone paint; discontinued for 1989 (the 1989 what's-new page)

GM Heritage factory kit — 1982 Chevrolet S 10, p.7.
GM Heritage factory kit — 1983 Chevrolet S 10, p.22.
GM Heritage factory kit — 1984 Chevrolet S 10, p.12.
GM Heritage factory kit — 1985 Chevrolet S 10, p.19.
GM Heritage factory kit — 1986 Chevrolet S 10, p.11.
GM Heritage factory kit — 1987 Chevrolet S 10, p.19.
GM Heritage factory kit — 1988 Chevrolet S 10, p.19.

S-10 pickup — Second generation (1994–2004)

1994–2004 Factory-verified

GM factory document — 1998 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2003 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet s10 pickup 4wd rpo code list, p.1.
GM Heritage factory kit — 1994 Chevrolet S 10, p.7.
GM Heritage factory kit — 1995 Chevrolet S 10, p.10.
GM Heritage factory kit — 1996 Chevrolet S 10, p.7.
GM Heritage factory kit — 1997 Chevrolet S 10, p.5.

TrailBlazer — GMT360 (2002–2009)

2003, 2004 Factory-verified

GM Heritage factory kit — 2003 Chevrolet Trailblazer, p.36.
GM factory document — 2003 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet trailblazer 2wd rpo code list, p.1.

This page aggregates every documented appearance of YC3 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.