Ok I'm pretty sure I've got this figured out but thought I'd post it anyway and get some feedback. 97 blazer is in limp mode, starting off in 2nd gear and then only shifts to 3rd. No 1st and no overdrive. Here are the codes.



This comes and goes one day it shifts fine and the next its in limp mode. Im thinking bad or loose main trans connection. Or bad key switch. Also sometimes the key won't turn all the way back to lock position and I can't get the key out. Thoughts?

 

Ok so just incase any one goes looking for an answer. I figured it out. Bad ignition switch. I just jumped a power wire to the trans fuse until I get i changed out.

 

Thanks for posting the follow-up!