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WARNING LIGHTS GUIDE THE WAY

A little light can go a long way, especially when it’s telling you important informa-

tion about your vehicle. If any light turns orange or red, it means you should have

your vehicle serviced as soon as possible. Use the guide below for more tips.

• Temperature Gauge/Light Indicates the temperature of your vehicle’s coolant.

A reading in the “H” zone of any light means “HOT” and is an indication of

trouble. Should you receive this notice, pull over to a safe location, shift into

neutral (N) and allow the engine to idle. Do not continue to drive if the

temperature does not return to normal or the “HOT” light stays on.

• Service Engine Soon (SES) Light This may also be called the Malfunction Indica-

tor Light and is part of the Onboard Diagnostic System, which maintains the

Emissions and Engine Control System. Normal operations may show this light

brieﬂy when the ignition is turned on. If the light remains on during driving,

there may be a potential engine problem. If that’s the case, be sure to seek

service promptly.

• Voltage Gauge/Battery Light This light indicates the electrical system’s voltage

when the engine is running. Service is required if the battery light comes on

or if the pointer moves to either “HIGH” or “LOW,” indicating too much or not

enough voltage.

• Oil Gauge/Light Indicates oil pressure, not the amount of oil in the engine. A

continuous “HIGH” or “LOW” gauge reading indicates an engine lubrication

issue and the need for immediate service. If the oil light stays on after you start

the engine or comes on while you’re driving, you could be low on oil or have

another problem, so be sure to have your vehicle serviced immediately.

• OnStar Vehicle Diagnostics* Every month, OnStar-equipped vehicles can run

a thorough check of the engine, transmission, anti-lock brakes and other key

systems, and email you the results. If you want an On-Demand Diagnostics

check, just push the blue OnStar button and our specially trained Advisors can

run a check — even while you’re driving.