I’ll try that and let you know soon thank you

 

I just read your post again, when did you replace the torque converter?

 

I replaced the torque converter selenoid when I changed the shift selenoids

 

TCC PWM failure usually sets p1860 or p1870. Your codes point to a signal loss(wiring/connectors)

 

So like a short somewhere? I haven’t done the steps u told me yet but I am doing them
tonight

 

Yes, and check the connectors since you caused more codes after you threw parts at it!

You started with P0717 ISS Failure(most likely shorted wiring inside the trans)

after you pulled the connector to the trans and threw parts at it, you now have:
P0976 Shift Solenoid B Control Circuit Low
P0787 Shift/Timing Solenoid A Low
P0973 Shift Solenoid A Control Circuit Low
P2769 Torque Converter Clutch Circuit Low
P2764 Torque Converter Clutch Pressure Control Solenoid Control Circuit Low

Did you perform the 1st step in any electrical component replacement: Disconnect battery?
Did you clear all codes and recheck?
Did you make sure all connectors were clean and secure?

At this point, my advice to you is to take it to a repair shop before you cause any more issues.

 

if you left the battery connected those might just be stored codes from when you disconnected the parts. if you erase them and they come back then it has issues as Hummers mentioned.

 

after hours of searching I found the wire harness under the transmission panel is pinched badly. I contacted the dealershiop
they told me its this part number gm part number 24298347. but its like 230 bucks..and its on back order.

any aftermarket harness I can find for cheaper?

thanks

 

is that the same harness you sent me a pic of in this post???? is that the same part? if yes where can I get it from and what would be the replacement part number instead of the oem

 

it might be better to just repair the one you have properly.