[Dval]

I own a 2006 Pontiac g6 GTP and as of a couple of days ago the battery had died from the recent cold. I jumped the battery and realized that the car still wouldn’t crank. I purchased a new battery and made sure it was charged and there was still no crank. The next day I got up early and started the car no problem and ran it and let it sit for a couple of hours and then it wouldn’t crank again. I took starter out to get tested and it tested fine and now when I go to start car it only cranks for maybe a second then dies out as if power is being cut. However for the past three mornings only the car will start and run fine but once I try again a couple hours later it doesn’t. Another weird thing is car will only crank for a second if my headlights are on if they are off car doesn’t crank at all. Can this be a faulty ignition switch?

 

[Convertme]

Yes it could be, but i think it could an expensive option too.
Could be a bad ground, or a poor connection on the starter. Are you sure aĺl the wire connectors are good and snug. If you do go with an new ignition switch you will need to make sure the anti theft deterrent is paired. Likely a visit to the dealer.
Good luck. Hope it works out for you.

 

[boomer]

An example for a bad ground would be the ground to the transmission. If it is intermittent or faulty, the transmission may not sense it is in park. That may cause intermittent cranking issues.