Probably too late to ask for pics of the cable if it has been towed. By "not start", you mean it will crank or it just clicks or nothing at all?

 

I posted pic’s in the comment area

 

Can;t tell much from the photo. Does it look like a heavy electrical cable? If so, I'd suspect the cable to the starter.

Does it look like a shifter or brake cable like you'd see on a bicycle? Then, I would suspect the emergency brake cable.

 

I think it looks bigger than a bicycle cable. I would go look to be sure but it’s at the dealership. The son-in-law mentioned the starter last night. Hopefully it’s an easy fix.
Thank you 😊

 

Normally from that area it is the emergency brake cable.
Does the engine crank?

 

Nope. The only thing that happens is the instrument panel lights up and does its beeping thing as it should.

 

Ok, hopefully they have someone at the lot that is capable to checking the various fuses underhood; one that connects to the positive battery terminal and several others located in a fuse block/center near the battery. It may be as simple as a blown fuse or relay.

 

Had the same problem not long ago with the wife's Silverado 2500 HD.
Batteries only a few months old, fully charged, no corrosion on terminals.
Key on, all the dashboard gauges and lights were fine. Headlights worked.
Turn key to start and NOTHING. Not even a click.
Which led me to believe juice wasn't getting to starter. Pulled the top off the underhood fuse box, saw a relay marked START. Hmmmm. Took that relay out of my GMC Sierra, put it in hers, and presto!! Start and run.
Went down to O'Reilly Auto Parts and with my employee discount it was less than $7.

Wife thinks I'm a genius, and that, my friends, is priceless.

 

I hope it’s an easy fix! Thank you.

 

It is the emergency brake cable and my starter went. Hopefully it will will be done before Wednesday!

 

I didn't "like" your problems, just that they are easy fixes that your shop can take care of, and quickly.