Air conditioning, single-zone automatic climate control

Years 1998–99, 2011, 2025–27 Models 5 Factory citations 10

Also described as HVAC system, air conditioner, front, automatic, electronic controlsHVAC system, air conditioner, front, automatic electronic controls

Also documented for Cadillac Chevrolet GMC Oldsmobile Pontiac Saturn

Documented applications

Envision — E2XX (2021–2027)

2025–2027 Factory-verified

2027: Preferred, Sport Touring: S

GM factory document — 2025 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide, p.1.

Envista — VSS-F (2024–2027)

2025–2026 Factory-verified

all trims: S

GM factory document — 2025 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2025 buick envista fleet order guide, p.1.
GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2026 buick envista fleet order guide, p.1.

LaCrosse — Epsilon II, 2nd gen (2010–2016)

2011 Confirmed

2011: deleted for 2012 per GM Authority 2012 RPO list

LeSabre — H-body (1992–1999)

1998–1999 Factory-verified

GM factory document — 1998 buick lesabre rpo code list, p.1.
GM factory document — 1999 buick lesabre rpo code list, p.1.

Skylark — N-body (1992–1998)

1998 Factory-verified

GM factory document — 1998 buick skylark rpo code list, p.1.

This page aggregates every documented appearance of C68 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.