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My 2003 Chevy Impala won't start. Last night the temperature outside was below 35...

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i am not sure i think the battrey or gas may have froze go to just ansewr.com and they may be able to help
 
first thing I would do is check the level of coolant. If your car had been very low on coolant or trying to overheat while driving there is a good chance that it may have froze during the night, especially if you don't keep it in a garage.

If your engine froze... start crying now.
 
Get a new battery. Try to find one with as many cold cranking amps as you can find. Probably 900 or 950 or higher if you can. It might cost a little but it will save you lots in future.
 
Plug it in and try again. When it is cold out the battery gets weak as it ages. Kinda like me..My vehicle did the same to me, but i didn't quite have it in gear, could be many things.....Cars hate the cold!~
 
One thing could be your battery. Do you have a neighbor who can give you a jump start? You may end up just buying a new battery, in the end. If once you get a jump start, and it still won't start, but does turn over, you may have a frozen gas line or moisture in the tank. you may want to have a can of gas line antifreeze on hand, as well as a can of fuel ingecter cleaner on hand, as well. Both items can be purchased at your local Wal-Mart store, or any auto parts store, like Auto Advance, Napa, Carquest. And so on.
 
When it gets 35 below most cars need help. A block heater works well but with out something to keep the engine warm it's just a toss up if it will start even with a new battery. A good battery helps but there is no guarantee it will start. Another thing that helps is to put a trickle charger on the battery over night it keeps the battery warmer.
 
This 5 year old car more than likely has the factory original battery. 5 years is about the average life expectancy of a good automotive battery, especially in a cold climate.

In cold weather a battery has less cranking power. A weak battery will have little to none in cold weather.
 

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