CY1 ✓ Factory-verified

GMC · Regular Production Option

Country, Africa

Years 1999, 2009 Models 3 Factory citations 3

Query this via API →

Also described as Country code: Africa

Also documented for Chevrolet

Documented applications

Sierra — GMT800 (1999–2007) →

• 1999 ✓ Factory-verified internal
  ⛭ GM factory document — 1999 gmc gmc c sierra 2wd rpo code list, p.1.

Sierra — GMT900 (2007–2013) →

• 2009 ✓ Factory-verified internal

  The list adds do not release parts to this option.

  ⛭ GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.

Sierra HD — GMT900 (2007–2014) →

• 2009 ✓ Factory-verified internal
  ⛭ GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.

This page aggregates every documented appearance of CY1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.