4L80E issues with valve body swap p1870 PRNDL fuse

Discussion in 'Transmissions' started by Kelly Lindenberg, Oct 8, 2018.

  1. Kelly Lindenberg

    Kelly Lindenberg Newbie

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    Oct 8, 2018
    Hey all... 2000 Chevy K2500, 5.7, 4l80e... just recently swapped out valve bodies with a rebuilt valve body I found online to fix a long running p1870 transmission related code... everything seemed to go well and vehicle ran good for the first 5 minutes, then the PRNDL fuse blew, knocking out the tachometer, speedometer, dash gear indicator and the ability to progressively switch gears as you speed up... vehicle was working ‘fine’ before valve body swap (besides p1870)... every time I change the fuse, it blows instantly... every time it blows I’m stuck in first... ideas... ?

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