Money Light on 8-Speed, P0700+P0711

[Ltz4 me?]

Diagnosis from Chevy dealer is a faulty wiring harness( under warranty)

They won't cover full tranny/ torque converter drain, flush, fill, new filter tho...290$ but I'm having them do it , it's worth it to me...

[midwestdenaliguy]

Here are the details on the special coverage that extends the warranty for this issue: 

 

[Asmith721]

I’m having this same code thrown on my 19. Problem is I have a pulsar Lt and when I remove it to take it to dealer it clears the codes apparently. Dealer can’t find a stored code anywhere. Unsure what to do, I love the truck with the pulsar and the code is sporadic so I don’t know if I pull it out and run the truck for awhile without it and hope code comes back so it’ll get fixed under warranty? Unsure of how to proceed

[Andy Ceh]

Good evening, I am reading that the harness 24298757 was replaced by 24046895 for this repair. 

 

I am not under special coverage so I am doing the replacement myself. Can anyone confirm whether this is correct or incorrect?

 

2015 Yukon Denali L86 6.2L engine w/ 8-Speed 8L90 transmission. Thank you in advance

[Thall]

So I’ve got a 2015 1500 Silverado 6.2 with the 8 speed. She now has 72k miles and I’ve been dealing with the same codes along with random misfires cold start rough idles. Replaced the plugs wires and coil packs no change. Local transmission shops have all quoted me around 10k for new trans and install, not gonna do that so what are my other options ? And how would that fix my misfires ? Also has a slight shake or shudder on the highway. When I delete the codes she runs and shifts smoothly just with a loss of power. Nobody can seem to figure it out