i have a 2000 buick park avenue that shuts off going 50 mph then will not let me restart it until i drain the battery and get a jump start when trying to restart it starts for a second and shuts off like the security system is activated cause it says unknown driver on the dash
i have a 2000 buick park avenue that shuts off going 50 mph on 2000 Buick Park Avenue
try another key. it may be a security issue. otherwise, have the fuel pressure checked as you may have a failed fuel pump.