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It depends on which lights are being described. Some of them will be for gas, others for oil change, and then some for other issues.
There are different warning lights. Some will be for low gas, low coolant, or overheating. If these lights show up, look through your manual to find out what is wrong.
See {Warning Lights, Gages and Indicators} in your "Owner's Manual", under Section 3: Instrument Panel.....
Have a look in the small glovebox handbook, all the dash warning lights are there.
They will bright up when something is wrong. Each one means something different but you can use the users manual to figure them out.
this is a flat tire (!) this is caution lights on /_\ the gas pump means low fuel, a stick man with a ball in his face means the airbag is off, or has a malfunction
Look in your car manual and it will tell you what each symbol means. For example, check gauges light could be low on gas or oil.
Look in your manual.
Like this except the brackets are dotted. (O)
its red and its right in the center where all the other lights comeon
look on the vectra forums
look for a blown fuse.