Question about 2003 Buick Century
Go on line to the National Highway and Safety Administration(NHSA) and see if they have ant Technical Service Bulletins(TSB's) for this vehicle's particular problem. If they do bring this to the attention of your service station.
I had one of these vehicles several years ago did same thing drove me crazy turnes out to be main engine relay.
I used a scope meter and traced B+.'s travel upon crank and start up it went into the relay from ignition switch but never exited to make it to pump relay and ignition.
Posted on Aug 24, 2010
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Posted on Jan 02, 2017
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