Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Vehicle Emission Control Information

Typical VECI Decal (Federal Models):






Typical VECI Decal (California Models):






Each vehicle has a decal containing emission control information that applies specifically to the vehicle and engine. The specifications on the decal are critical to servicing emissions systems.

In addition to the tune-up specifications and procedures, the emission decal shows a color-coded schematic of the engine vacuum system. The color coding on the schematic represents the actual color coding on the vacuum hoses. However, there will be instances when a hose color does not match the color on the decal.

Typical location of the decal will be on the underside of the hood or the radiator support sight shield.