I'm swaping a 1998 Vortec 454 and 4L80-E into my 1989 Silverado. I am useing the stock 89 transfer case and am wondering if the PCM really needs a 4X4 engaged signal.
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I'm swaping a 1998 Vortec 454 and 4L80-E into my 1989 Silverado. I am useing the stock 89 transfer case and am wondering if the PCM really needs a 4X4 engaged signal.