Z55 Factory-verified

Chevrolet · Regular Production Option

Chassis package, bi-state, real time damping

Years 1963–79, 2000–01, 2003–09, 2014 Models 8 Factory citations 36

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Also described as Special VIN plateSpecial serial-number (VIN) plate

Also documented for Cadillac GMC

Documented applications

Impala / Full-Size

1963–70s (varies) Single-source

1963–66 Single-source

Export/special (kit Z-series pp.20 are mostly GVW-rating plates; Z55 line garbled)

Avalanche — GMT800 (2002–2006)

2003–2006 Factory-verified

GM factory document — 2003 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet avalanche 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Avalanche, p.38.
GM Heritage factory kit — 2005 Chevrolet Avalanche, p.37.

Avalanche — GMT900 (2007–2013)

2007–2009 Factory-verified

GM factory document — 2007 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet avalanche 2wd rpo code list, p.1.
GM Heritage factory kit — 2007 Chevrolet Avalanche, p.146.

Suburban — GMT800 (2000–2006)

2000–2001, 2003–2006 Factory-verified

GM factory document — 2000 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet chevy suburban 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Suburban, p.168.
GM Heritage factory kit — 2004 Chevrolet Suburban, p.45.
GM Heritage factory kit — 2005 Chevrolet Suburban, p.164.

Suburban — GMT900 (2007–2014)

2007–2009, 2014 Factory-verified

The 2014 guide words it as Autoride suspension package.

GM factory document — 2007 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2014 chevrolet suburban fleet order guide wayback, p.4.
GM Heritage factory kit — 2007 Chevrolet Suburban, p.154, p.157.

Tahoe — GMT800 (2000–2006)

2000–2001, 2003–2006 Factory-verified

GM factory document — 2000 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Tahoe, p.34.
GM Heritage factory kit — 2006 Chevrolet Tahoe, p.133.

Tahoe — GMT900 (2007–2014)

2007–2009 Factory-verified

GM factory document — 2007 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 2007 Chevrolet Tahoe, p.31, p.135.

This page aggregates every documented appearance of Z55 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.