I have a 2003pontiac grandam turned off ,parked locked . doors unlock, but car wont start . battery charged?

Question

garage said may have to take to electrical dealer security system maybe security ,what could be wrong do not have security alarm

Answer 1

They could be right. The car has a factory security system in the ignition where you put the key in. There's no siren or anything.

Try to start it and leave the key on. See if there's a 'security' light flashing on the dashboard. If there is it needs a new lock cylinder with the chip on it.

If there is a security light flashing, leave the key ON until the light stops flashing and go's out. It could take 10-15 minutes. When it stops flashing, turn the key OFF then try to start it. If it starts then it's the security system for sure.

This procedure resets the security system. However, this is not a fix. Until the problem is fixed, It will just act up and not start again sometime/somewhere until the problem is fixed.