1993 suburban won't shift

Asked by Ashleigh Oct 11, 2020 at 08:51 PM about the 1993 GMC Suburban K1500 4WD

Question type: Maintenance & Repair

Just aquired a 1993 suburban that I can't get to switch out
of 1st gear. 1st and R works just fine can manually shift 1-2
but it won't shift on its own. Changed out VSS which didn't
make a difference. Any other suggestions?

1 Answer

Behind the glove box there's a lil module can't remember the name but it controls speedodometer it suppose to have 12 volts mine didn't have but 5 volts it calibrated the speed and shifter and speedodometer

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