HVAC system, heater, outside air, with fan, electronic controls

Years 1995, 2005–09 Models 2 Factory citations 7

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Also described as HVAC system, heater and vent

Also documented for Pontiac

Documented applications

Cobalt — Delta (2005–2010)

2005–2009 Factory-verified

GM factory document — 2005 chevrolet cobalt rpo code list, p.1.
GM factory document — 2006 chevrolet cobalt rpo code list, p.1.
GM factory document — 2007 chevrolet cobalt rpo code list, p.1.
GM factory document — 2008 chevrolet cobalt rpo code list, p.1.
GM factory document — 2009 chevrolet cobalt rpo code list, p.1.
GM Heritage factory kit — 2005 Chevrolet Cobalt, p.40.

Lumina APV — U-body (1990–1996)

1995 Factory-verified

the 1995 option-weight page marks it standard

GM Heritage factory kit — 1995 Chevrolet LuminaAPV, p.77.

This page aggregates every documented appearance of C40 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.