2008 Chevy Silverado 1500 4.3L. TCM won’t communicate, no gears, no speedo,

So I have a Chevy Silverado 2008 v6 4.3 extended cab about a week and half ago.  on my way home from work I made a stop at the store. No more than 10 min later. When I started my vehicle back up the ABS and check engine light came on. The Speedo completely stopped working and the truck wasn’t accelerating normal when I pressed on the gas pedal and I started hearing  this clicking sound coming from my dashboard every time I hit the brake pedal, and it also wouldn’t show me what gear I was in.  This morning when I stated up my truck to go to work there was a lot of smoke coming out from the exhaust. But after being on the road for a bit it stopped throwing smoke from the exhaust although the same problems where still present prior to today. So I stopped at autozone so they could give me codes for the problem. And this is what came up. So I got on the internet and did a quite a few researches to try and figure out the problem. After an hour or more of research, I ended up buying a speed sensor and rear wheel speed sensor I installed the new speed sensor hoping it would fix the problem, but it didn’t. So I continued with the next step to try and install the rear wheel speed sensor but when I pulled it out of the box. I noticed they’ve had given me a used one. Plus I had a really hard time trying to locate it on the truck to get it installed. I wasn’t able to find it. So I thought maybe they gave me the wrong part. I went back to exchange it for a new one and to tell them they might have gave me the wrong part. But they reassured me that my truck does have the rear wheel speed sensor. So one of the employees came out to try and help me locate it. But failed as well. So where chopping it up a bit trying to figure out what the problem could be after a few min. He ended up offering to run a code test with his personal obd2. And on his the only code that came up was the U0101  saying something about not being able to receive communication with the transmission control module so he told me he was sure that was the problem so we went back into the store so I can buy a transmission control module but they didn’t have it in stock so they ended up ordering one so I can pick up tomorrow in the afternoon. Ohh yes I forgot to mention that right before I stopped at the store prior to the problems starting. I got on this road the had a lot of potholes  and was badly maintained. That I even said to myself “why did I come through here” but never thought nothing of it. Not sure if that has anything to do with it but just wanted to throw that in there. I ended up getting the tmc so me and my buddy installed the new one and lights came off the dashboard showed me what shifting I was in and Speedo started working but we new it needed to get reprogrammed so we took that one off and put the old one back in. So fast forwarding to yesterday I finally found a place where they were able to reprogram the tmc for a fair price. But unfortunately they couldn’t program it because they said it didn’t want to communicate with the main computer from the car. So I don’t know what to do next, can someone please help me how to solve this problem someone that’s had a similar situation and was able to fix the problem 

Julio805 wrote:

 Ohh yes I forgot to mention that right before I stopped at the store prior to the problems starting. I got on this road the had a lot of potholes  and was badly maintained. That I even said to myself “why did I come through here” but never thought nothing of it. Not sure if that has anything to do with it but just wanted to throw that in there

 

I would guess that this is significant.

Do you have communication with the Engine Control Module? If so, then I would concentrate on power and ground to the TCM. Start by checking fuses 14 and 19, in the engine compartment fuse box. Then, check for voltage on the Ground wire of the TCM, at the connector, Pin 49 BLK/WHT wire, with the key ON.

If you cannot communicate with the Engine Control Module, then grab an ohm meter and check the resistance between pins 6 and 14 of the DLC, with the ignition OFF.  A reading of close to 60 Ω is a good reading. Anything else indicates a problem with the CAN bus.
 

There is a vid on how to re set tcm by yourself on google Amigo good luck