wesmanh

Hey new here. I’ve got a 1997 gmc serria 1500 4x4 extcab. It has around 150 miles. The other I go to leave work and two codes pop up. P0740 tcc solenoid circuit and P01860 Tcc pwm. The truck acts like it’s stuck in 3rd gear. Reverse works. The speedometer and maybe the tach also stopped working. I’ve read up some on this but wanted to ask around before I start digging into this. Faulty ignition switch?? thx