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Slightly Modified 2006 CCSB LBZ w/ 609,675Km's (~385k Miles)
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Discussion Starter · #1 ·
I have EFI live in my 06 LBZ.
I wish to re-Flash my ECM with a Stock GM Tune .
THAT In itself will not be an issue, have good friend - Diesel Tech at local GMC dealership.

What I'm curious about is that I have the 5 position Switch...and what do I need to do in regards to this..??

Leave it alone.?

Set at the EFI Stock Tune 1 and leave it.?

.....or does it and its accompanying wiring need to be removed a well..??

Much appreciated
Theo
 
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