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My daughter has an '03 Impala. The TPMS has been indicating 'low tire pressure' since she got it. Today she tried to reset the system using the light switch method. I wasn't there but apparently there was a clunk, then the car died. Now she's getting nothing at all. When she turns the key the gauges go haywire but it acts like a dead battery. I'm thinking something to do with the anti-theft system. Tried disconnecting battery then trying again but it didn't work. Any suggestions?
 

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My daughter has an '03 Impala. The TPMS has been indicating 'low tire pressure' since she got it. Today she tried to reset the system using the light switch method. I wasn't there but apparently there was a clunk, then the car died. Now she's getting nothing at all. When she turns the key the gauges go haywire but it acts like a dead battery. I'm thinking something to do with the anti-theft system. Tried disconnecting battery then trying again but it didn't work. Any suggestions?


A battery with one or more bad cells, or just worn-out will cause all types of electrical issues. Corroded battery terminal connectors and posts will also cause issues, as will loose connectors.

I would strongly suspect the battery and/or connectors.
 

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Discussion Starter #4
A battery with one or more bad cells, or just worn-out will cause all types of electrical issues. Corroded battery terminal connectors and posts will also cause issues, as will loose connectors.

I would strongly suspect the battery and/or connectors.
Thank you! Got a new battery and it did the trick.
 
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