06 silverado 1500 2wd 4L60E.... I've owned this truck for over a year now and had no troubles other than a slight hard shift from 1st to 2nd if under 1600rpm. Was parked for a week and upon driving I noticed it was sluggish when accelerating as if it we stuck in 3rd and wont go into 4th. Manually I can shift it from 2nd to 3rd and down shift 3rd to 2nd. Check engine light threw P0740, P0753, P0785, P0758, P2761. All at the same time.... bought the 2 shift solenoids, down shift solenoid, and clutch pressure solenoid, and changed the filter while I was in there. Before fixing the problem I drove it to work so I could fix it there and it shifted fine so I decided to leave it alone. Lunch time came shifted fine. When going home same problem, it was stuck in 3rd. Drove it again the next morning to fix it for sure this time and again shifted fine. Changed all the solenoids, filter and added fluid of course drove excellent for 3 weeks. Again I had parked it for about a week and guess what. It had a check engine light again and wasn't shifting. Now I have to get it scanned again to see what codes are coming up.
I've read some forums and my supposed problem could be a transmission fuse under the hood that could be blown, "loss of power"??, or a O2 sensor harness that's touching the exhaust which I don't see how that could cause the transmission to have this problem. Before I take it to a shop to get looked at and get charged for a rebuild has anyone had this issue and fixed it? Any advce? Help and very much apriciated.
I've read some forums and my supposed problem could be a transmission fuse under the hood that could be blown, "loss of power"??, or a O2 sensor harness that's touching the exhaust which I don't see how that could cause the transmission to have this problem. Before I take it to a shop to get looked at and get charged for a rebuild has anyone had this issue and fixed it? Any advce? Help and very much apriciated.