YA7 ✓ Factory-verified

Chevrolet · Regular Production Option

Assembly line emission test, California

Years 1970–79, 1998–99, 2006 Models 8 Factory citations 7

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Also described as California assembly-line emission testCalifornia assembly line emission testTest, emission, California assembly lineTest emission, California assembly line

Also documented for GMCPontiac

Documented applications

Camaro →

• 1970s ● Confirmed

Nova / Chevy II →

• 1973, 1975 ● Confirmed

Astro — Second generation (1995–2005) →

• 1998, 1999 ✓ Factory-verified internal
  ⛭ GM factory document — 1998 chevrolet astro 2wd rpo code list, p.1.

  ⛭ GM factory document — 1999 chevrolet astro 2wd rpo code list, p.1.

C/K pickup — GMT400 (1988–2000) →

• 1998 ✓ Factory-verified internal
  ⛭ GM factory document — 1998 chevrolet chevy c pickup 2wd rpo code list, p.1.

Express — GMT610 (2003–2027) →

• 2006 ✓ Factory-verified internal
  ⛭ GM factory document — 2006 chevrolet express rpo code list, p.1.

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

• 1999 ✓ Factory-verified internal

  only in: S-10 Electric 1999 from the S-10 Electric list

  ⛭ GM factory document — 1999 chevrolet s10 electric rpo code list, p.1.

Suburban — GMT400 (1992–1999) →

• 1998 ✓ Factory-verified internal
  ⛭ GM factory document — 1998 chevrolet chevy suburban 2wd rpo code list, p.1.

Tahoe — GMT400 (1995–1999) →

• 1998 ✓ Factory-verified internal
  ⛭ GM factory document — 1998 chevrolet tahoe 2wd rpo code list, p.1.

This page aggregates every documented appearance of YA7 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.