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Old 08-05-2010, 08:51 AM   #1
mcbassin
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Join Date: Jul 2009
Location: Central Oklahoma
Posts: 10,108
Using an electronic speedo with TBI and 700R4?

Anyone done this upgrade? I installed a motor and transmission from a 93 Roadmaster in my son's 86, now I am trying to get the speedometer from a 91 suburban to work. I don't know which wire should run to the speedo from the ECM or if I need new connector? any help or suggestion? I somehow lost my wiring diagram too...doh! HERE is a link to the swap. thanks!
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