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Old 12-29-2018, 05:33 PM   #8
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,944
Re: Weird switch on trans

If the state of Ohio does not have any smog inspections just remove the wire. It was GMs attempt in the early days to help with the NOx emissions by not allowing any timing advance until you were in high gear. The automatics has a pressure switch on the pass side that did the same thing
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