lost 2003 buick century ignition key

Asked by Alan Jun 10, 2020 at 10:12 PM about the 2003 Buick Century Custom Sedan FWD

Question type: General

lost car key set and looking for ignition key.  Can I go generic or do I need a
locksmith?

1 Answer
157,625

James answered 4 years ago

You need a locksmith who is familiar with GMs VATS security system or your local GM Dealer. Your ignition key has a visible chip on it. This is a resistance block that tells the computer that the correct key is being used to start it. There were 15 different resistance value keys available. See the chart below. Your locksmith or GM Dealer will need a VATS Interrogator tool to determine which resistance value key you need to be able to start the engine after the key code is determined and new keys are cut. Hope that helps! Jim

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