The horn work?
connections from the battery terminals are clean?
If so, remove the battery terminals for up to 5 min and fit back
Now try to start the car!
SOURCE: 1998 Buick Century- Service Engine Light Soon came on
i had a simaler problem(still having problems but not this one anymore) i had a local mech. look at it and he said it must be a vacume leak,but it stumped him as it would shut down then u pull over and wait a min. and it would start and run fine for a few miles or days...i followed the "air/vacume" line off the pcv vale i think to the back of my engine near firewall and on the intake right below the coilpack was a hose loose that came out of a rubber t shaped connection,i put it back in and have never had this problem again...im on a new problem now..lol...hope this helps you out...good luck to all buick owners..:)
SOURCE: 2001 Buick Century I have a problem with
about $100, mostly labor on the dash illumination issue.
SOURCE: HOW TO CLEAN '94 BUICK CENTURY 3.1 EGR VALVE ..I
to properly clean and test the egr valve you should remove it from the car. disconnect vacuum, elect connectors, and check the gasket surface both on the manifold and on the base of the valve. you will need to buy or cut a new gasket most likely. when you apply vacuum to the control inlet, you should see the valve lift away from the seat. I use brake cleaner and compressed air to spray clean and blow out the valve just to test it and then go from there depending on what you find ---- one of the vacuum switches that controls it or a faulty vacuum line is a likely possibility also ---- so you should check them also. a vacuum pistol comes on really helpful here.
SOURCE: 99 buick lesabre, battery ok, turn key to start, nothing
The security system (VATS/PassKey) is faulty. You can find a great write-up here: http://newrockies.ca , it was the only thing that saved my Park Avenue.
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