I have a 96 Silverado C-1500 2wd. Tach, speedo, odometer, and the range selector light isn't working. It is also stuck in 3rd gear. The heat blower motor quit working and windows wouldn't work around the same time. Messed with the ignition switch harness under the dash and now the blower works fine as well as the windows. Any thoughts would be greatly appreciated. I pulled codes off, P0740 Torque Converter Clutch Solenoid circuit open, P0753 Shift Selonoid A, P0756 Shift Selonoid B, P0785 Shift Timing Selonoid (Malfunction), P1860 Torque Converter Clutch Pulse Width Modulation Solenoid circuit.

 

My goodness you have a mess. I would just scrap it. Nah I'm kidding. I have no idea