Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Which module did you pull these codes from? Have you charged the battery and got it running since? There are some codes that will set when there is a low voltage concern.
I would ignore the codes for now. Is it still shifting hard? The codes you gave me aren't found in the pcm. You'll need to scan the pcm and see if there are codes in it. Usually a hard shift is due to a code setting for the trans, but as I just stated, the codes you gave me weren't from the pcm.
Let me know.
If you ever get any PXXXX codes in the pcm. just let me know. I can always look up the diagnostic charts for you.
Best of luck. Hope your overhaul was successful.