Is anything else loosing network connection? For instance the tach or radio?

A TCM would actually be the first thing I try. You can get them used for very cheap and they do not need to be reprogrammed for your truck.

 

No, nothing else has lost connection. I was told its not smart to buy a used one and that new ones are 1,000.

 

Any recent mods, new HU/chime module etc..?

 

No new mods

 

Check for a loose connection at the TCM (#1).

T.C.M. MODULE (M30)

 

I have tried checking for a loose connection, but I have yet to unconnect and reconnect it to see if that helps, I know where to unconnect it just can't figure out how to unconnect it, cant get them apart.

 

FYI....
From the shop manual....

Transmission Control Module (TCM) Replacement

Procedure
A new TCM requires programming. Refer to Control Module References .

Tip
• Disconnect the TCM electrical connector.
• Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.
• It is recommended that transmission adaptive pressure (TAP) information be reset. Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, The engine control module (ECM), powertrain control module (PCM) or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned. Reset the TAP values. Refer to Transmission Adaptive Functions.

 

The truck is fixed, running and happy. But I did come across a lot of trouble with this problem not being able to find any answers online so I figured I would post the outcome for anyone who comes across this problem with their truck. The code the truck gave me was U0101, lost connection of transmission control module. At first the problem was something that would come and go as I was driving around the city. Before I replaced anything serious I wanted to see if it was something as simple as the battery, got the battery tested and the guy told me it came up as bad, so I bought a new battery and the previous battery was 4 years old and from the factory. After the first day of a new battery I started my truck and the problem was not only not gone but now it was permanent and on 24/7. No working speedometer, Odometer, gear lights, and the truck was in limp mode. The last thing I want to do is take the truck to a shop for someone else to fix. But the tcm is really something you can't replace yourself considering you have to have it reprogrammed by computers to fit your vehicle, unless you buy a used one that is from the same make,model and year as your vehicle. Ended up having to take it to the dealer and at first they couldn't figure out if it was just the tcm or the WHOLE transmission. It ended up just being that the tcm went bad and luckily my truck is still under the 5 year power train warranty so it was free. New tcm would have been $142.00 and $125.00 for installment. Thanks for all the help provided.

 

Glad you got it fixed and that it was covered on warranty. Thanks for letting us know how the issue was resolved.

 

"You can get them used for very cheap and they do not need to be reprogrammed for your truck."

If you are referring to a TCM or a PCM(ECM), that is incorrect information.