you havent taken the key out of the ignition.
Have vehicle scanned to see if any codes are present
Replay in lamp control module sticks closed causing lights to stay on gm posted tech service bulletin for problem.
Is there a reset button for the fuel pump somewhere and if so, where is it?
The check engine light on the 1998 Buick Park Avenue can be reset by disconnecting the battery for a few minutes and then reconnecting it. The check engine light is only going to stay off if the problem that created the light is fixed.
its missing 4 cylinders sir!
You should have the codes read to see whats wrong.
try checking your gas cap it may need replacing
There is a switch called the "twilight sentinel". That alllows you to adjust the time that the lights will stay on after you turn the engine off. Check to see if that is working properly.
On a 2004 Buick Lesabre it could be a faulty (MAP) Sensor, Manifold Absolute Pressure Sensor. The car could start, run and drive, and when you shut it off it will crank but not start up again.
Because you did not have a faulty EGR valve. You misdiagnosed the problem. Start over and remember the code only tells you what part is being effected not necessarily the defective part. This is assuming you reset the light or drove the car enough cycles for the light to reset. If not then reset the light and see if it comes back on.
The engine needs serviced? it could be multiple things maybe even your gas cap not on right take it to a auto part place and they usually can scan it for you