P0785 Chevrolet Code - 3-2 Shift Solenoid Circuit Electrical

truck doesn,t slip and no burn smell in oil shifts from 1 to 2  and has rev but won,t shift from 2 to3

You could have a bad solenoid pack, Have a transmission specialist check your vehicle.

My 2004 Silverado takes off in 3rd gear and does not shift at all unless you manually shift it the. It will only go to 2nd gear and you can speed up shift to 3rd it will shift but 2nd amd 3rd is all it has other than reverse I also have the p0785 code I hooked up my scanner and erased the code drove it the trans took off in first shifted to second then 3rd a.d stayed there in limp mode again with the p0785 code back what do you recommend. This transmission is rebuilt by a professional shop so I know everything on the inside other than. The electronics is new. Where should I start

How long did you got the transmission rebuilt? what is the engine size of your Silverado?

It is my step dad's truck he came in last week said his trans had went out. I had rode with him a couple days before and told him I didn't like the 2 3 shift and he said it gotten worse the last couple days so I didnt think much about it when he came in saying that the trans had started slipping the next morning I pulled the transmission transfer case and driveshafts out of it and at that point I found he had replaced the carrier bearing and had not put the driveshafts back together right and instead of the slip yoke sliding on amd out of each other the rear was pushing the front shaft into the back of the transfer case and had cracked the transfer case and ate up the driveshaft yoke that slides into the rear of the transfer case. So I ordered a new driveshaft yoke and took the transfer case to a friend that owns a transmission shop to see if he could replace the back housing half on it. Well the transfer case was trash. We ordered a used one from LKQ my friend at the trans shop tore down the transmission and when he did he called me and said that the trans looked OK but since he had it tore down and this is a truck that pulls a lawn care trailer around 5days a week it would still be a good idea to build it a d he and I figured the trouble must have been in the transfer case. I am figuring out now that yes the transfer case and driveshaft was bad but this p0785 code must have happened about the same time and with the truck taking off In 3rd gear not have no power taking off in high gear my 74 year old step dad thought it was slipping. The engine Is a 5.3 UPDATE I replaced the shift solenoids and wiring harness inside the trans and the problem. Is the same clear code and when I start the truck and put it into gear the code returns

I checked a national database of repair for your vehicle and the P0785 code, and 90% of the times the problem was the shift solenoid (the other 10% was the transmission filter and the pan gasket). Any other codes? in my opinion if you have already replace the solenoid and wires, then it's possible that something went wrong during the transmission rebuilt.

No other codes present the guy that built it is the one that replaced the solenoids and wiring harness inside the trans. He has built transmissions for 30 years and assures me that the problem is not with the trans itself. That it is going to be the neutral safety switch, the ignition switch, or the trans controller or wiring between those somewhere. I need a wiring diagram to be able to do some testing. I used to use alldata and it would give you a flow chart to tackle problems with. I would really love to have one of those.

The ignition switch is mention many times on the database, but when other codes are present.

Here is the wire diagram from the service manual. I hope that helps