Sales package, convenience III

Years 2005–09, 2025–27 Models 2 Factory citations 8

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Also described as Convenience Package III

Also documented for Buick Chevrolet

Documented applications

Canyon — GMT355 (2004–2012)

2005–2009 Factory-verified

GM factory document — 2005 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2006 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2007 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2008 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2009 gmc canyon pickup 2wd rpo code list, p.1.

Terrain — Third generation (2025–2027)

2025–2027 Factory-verified

S: Denali (from 2026); O: Elevation, AT4 (from 2026); includes A7K, AT9, KA6, KU1, KU3 and A45; on Elevation it requires GHI

GM factory document — 2025 gmc next generation terrain fleet order guide, p.7.
GM factory document — 2026 gmc next generation terrain fleet order guide, p.1.
GM factory document — 2027 gmc terrain fleet order guide, p.1.

This page aggregates every documented appearance of ZL4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.