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What are they and how do I know if I need one? I've read some of the topics about the car's batterly light blinking (mine does this) and about the car going back and forth at low RPMS (mine does this as well). How do I go about getting the ECU upgrade?
 

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I would do a search for this instead of starting a new topic. check the other thread, I responded to your post there.
 

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You have a 2003, so you should already have the latest update (RLA6.) Check the door jam on the passenger's side. There should be a sticker marked RLA6.
 

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To make a long story short, do what thingingSVTF said and check the passenger door jam. If you have RLA6 then you've got the latest.

There is a rumor that a new program is to follow but as of yet, nothing has come from SVT that offically says they're going to release something.

There are about a billion threads on this if you need more info. Otherwise I hope this anwsered your question.
 
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