No start no dashboard message no sound wtf i replaced alternator and battery with new parts less than 30 days ago now whats the problem? When i turn the key on no sound but all lights are on sometimes you can hear it trying to start and sometimes it will start help me please 2006 chevy hhr lt 2.4 4 door

 

What you are describing sounds like a fauly ground either on the engine or the body. Double check everything you can see, these little truckets need good reliable source of power to work.

 

Hi Debra, to the forums!!

It sounds like the battery is dead again. You may have a parasitic drain, or the new battery or alternator has failed. The battery may need the terminals cleaned.

Charge the battery if needed, and have your local auto parts store perform a charging system test. They can charge and test the battery for you if you do not have a charger.

 

Make sure the large red wire is connected securely to the underhood fuse box.

Moved to a new thread

 

Welcome to the site.
Based on the info above I'm guessing this is an ongoing issue and not a 1 time occurrence . Like the others have stated, sounds like maybe a bad battery connection somewhere. As Don said, check the main battery cable at the underhood fuse box.
If you're not familiar with automotive electrical stuff, find a friend to help or a good repair place.

 

Asking to "help me please". 6 days later and the OP hasn't returned.
I wonder why I even bother to answer.

 

Because you're a first responder, you care to help others, complete strangers !
So you jump in both feet!
That's what makes you , you!!