Problems with anti-theft systems using the raised-chip key can prevent the car from starting. The wires in the steering column to the ignition lock cylinder tend to break. The key and ignition lock cylinder should be replaced to correct this condition.Google+
Car Problem Reports
Buick Park Avenue Car Won't Start Because of Anti-Theft System That Uses Raised-Chip Key
Buick Park Avenue Problem
Average Mileage: 130,790 mi (60,000 mi - 199,800 mi)
for 4 times during the last 6 months it had no power to start the engine. Battery wwas checked 3 times and AAA and dealer could not find problem. Went to NTW and they examined the car and said battery was bad. 7 weeks later it did not start again. There is no sign in the lights and no noise from the start attempt. I do believe it is electronics but I need something to point my dealer at the problem.
security light stayed on one day, but car ran fine. now it may stall as I drive, giving me no indication.
Visitor, 1996 Buick Park Avenue, 105,000 mi
REPLACED IGN CYLINDER AND KEYS
Visitor, 1993 Buick Park Avenue, 150,000 mi
car won't start - mechanic says it is related to anti=theft system; not fixed yet
car started once then won't start again thought starter but found no power to the start wire at starter when key is turned over. all fuses good, no power going into start switch at transmission.