My son's 04 Grand Prix has the old no crank, no start issue. Occassionally it will start after sitting a while, run a couple days then leave you stranded by not starting. Eventually it will start and we get her home.
- test battery = ok
- No power on purple signal wire with key held in start position
- Fuel pump primes when turning key on, all gauges and lights work.
- Jumped crank relay turns over fine = starter ok
- changed out ignition switch = no change
- changed out ignition lock with different pk3 = no change although it did start without rprogramming security
- neutral safety switch ruled out early on
- We found a different BCM with same serial number tried that, again it ran then died couple days later.
We are stumped I've talked to several mechanics and they all said pk3 was bad, we changed that still nothing.
It is a NA basic gt if that means anything.
there is no security light flashing or staying on as a matter of fact it doesn't blink when hitting the lock on the fob.
We have become rather proficient at tearing the dash apart and swapping relays. All fuses checked out ok also.
