Chevy & GMC Vans

Hey guys I am new and REALLY stuck, I have a safety inspection coming up to get my van on the road but now for some strange reason I lost
my;
-NO Speedometer
-NO Shift Indicator (no P/R/D/1/2) [little red/orange horizontal line]
-NO Reverse Lights
I have a U0101 TCM code.
Also I have ABS problem too #-o [no ABS code(s) oddly enough.
-ABS pump motor continuously runs even when the van is off. (Killed my battery is how I found out {doh} )
I Unplugged the ABS Control module MAYBE THAT caused the others to freak out & just need an ABS control module & reset the TCM?
ANY help or does the Pros at the garage have to use the multi thousand dollar diagnostic machines to find the fix?

Thanks
~Christian~
P.S. I tried to search the forum for these seprately but came back with nothing (odd or this forum that small?)

Welcome GreyManVan. You need to include your vehicle info with every help question please.

GreyManVan wrote: ↑Thu Jun 20, 2024 10:54 am I have a U0101 TCM code.

You need to specify which module reported this code.
For example if the PCM (most likely) reports U0101, then that means PCM is unable to communicate with the TCM.

There are many possible causes for loss of communication.
You can read about them here: https://www.obd-codes.com/u0101
My Savana TCM failed around 40k and had to be replaced.

GreyManVan wrote: ↑Thu Jun 20, 2024 10:54 am I Unplugged the ABS Control module MAYBE THAT caused the others to freak out & just need an ABS control module & reset the TCM?

Yes, pretty good chance of that. You shouldn't just unplug modules because it breaks the network. It would be like knocking over an electrical pole.
Plug it back in , and instead remove the ABS fuse to power it off.

GreyManVan wrote: ↑Thu Jun 20, 2024 10:54 amANY help or does the Pros at the garage have to use the multi thousand dollar diagnostic machines to find the fix?

Well you can do some basic stuff yourself.
Using a multimeter and schematics (gmupfitter.com or charm.li) you can test that the module has good power and ground. Inspect that the connectors are bright and clean and check for wire damage. Sometimes just re-seating the connector helps.

Typically, having a competent auto electrical/diagnostics specialist look at it is the most efficient way to get back on the road (or passing inspections).