I just bought a chevy impala 2009 and i dont now how to use the remote start can you tell me what botton to push to use the remote start

you did not specify what engine.
google 2009 chevy impala serpentine belt Diagram


copy and paste

https://www.justanswer.com/chevy/3ruw6-need-serpentine-belt-diagram-2006-chevy-3-5-lt.html

https://www.fixya.com/cars/t15630016-diagram_serpentine_belt_2009_impala_3_5l

Might be the cable going to the transmission sometimes it breaks

Have you working batteries in the remote?

Chevy Vehicle Manuals and Videos ' Owners ... - Chevrolet

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Chevrolet... and specifications? View Chevy Vehicle Owners Manuals here. ... 2015; 2014; 2013; 2012; 2011; 2010; 2009; 2008 ... View Owner's Manual ... 2015 Impala.

it down by the

Immobilizer fault, get a diagnostics check and the specialist will tell you straight away.

Check the base of the headrest at the plastic ring. There should be a small button that is pushed in from the side of the ring.

i dont believe so. the default setting on cars is heat/defrost. this way incase of a failure of some sort you will be able to see where your going.

This may be a anti-theft issue. If it is and you want it fixed, the Chevy Dealter is probably the best place to have this work done, IF it can be done at all. My Chevy radio instructions tell me that if there is a genuine power loss to the radio when the anti theft system is activated (like someone breaking into the car and stealing it, cutting the wires) that the radio will not work again with out GM intervention.

the only fix for this is to have the aftermarket alarm removed out of the system. unless you can locate the manufacture of the alarm and purchase another remote.

push relearn again then press and lock and unlock for about ten seconds till u hear beep