ok i am having an issue with my speedometer at first it wouldnt work at all so i read that the computer controls the buffer and that there was no need for the external speed buffer box so i removed it and re pinned the speedometer directly to the computer @ c1-b11 and still nothing except the needle just jumps around even in park and the odometer just keep on rolling.i cant seem to get this figured out, and it is starting to drive me crazy.could someone plaese let me know if wiring the speedometer directly to the ecm or do i need to do something else.

 

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