Swap the 2 outermost wires on the connector. I don't remember the colors offhand. Just leave the middle wire alone and reverse the outers and you will be good to go!
1993 AWD 2 door S10 Blazer. Stock 5.3/4l80e
1994 LWB Truck-Worlds Fastest Work Truck!! Built 370 with LS9 cam/front mount 76mm, built 4l80E with Precision/Circle D 3000 converter and JakeBrake. 10.92@126