I have a 2004 grand prix I lost the original key had to get one made had it programmed. I changed the starter and battery car I saying g nothing I don't know what else to do please help
this is a problem associated with 21st Century cars- you will need a good mechanic, a good locksmith, or a helpful dealer- or all of the above-
I agree, you probably need professional help. Any good repair shop should be able to sort it out. In the mean time stop replacing stuff until you know what is wrong with it.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts