Can a truck dealership remotely disable my truck?

Wouldn’t it crank but just not fire?

 

Chances are if its a newer truck, the starter relay that powers the starter solenoid gets its power from the ECM. ECM not powering up/communicating, no power sent to starter solenoid.

But we can't confirm anything because OP never bothered to tell us what we're looking at.

 

Yes, need to know make, model and year of truck.

 

Paccar engines used to be bad about this.
This is a communication fault.
J1939 is the backbone that every system on board uses to talk to each other. Depending on the year of the truck there are connectors at the left rear top of the engine. 2 pin connectors with a green and yellow wire. Check for a bad connection here.
If it's not obvious you'll need the dealer. There are terminating resistors in several locations that will need to be tested.

 

This!!!

 

Another forum member had a similar problem with his Pete and it ended up being a dead ECM.

2008 Pete 386 will not start

 

Seems the problem isn't a remote shut off based on other comments.

But, it is possible for a finance company to do that. Company I went through to finance my truck had such a device installed on my truck and it also provides GPS tracking for easy repo.

The first one they installed turned out to be defective, found out the hard way when my truck wouldn't start. I had to cut and splice the ignition wire to bypass the unit to get it to run so I could get it replaced.

 

Wouldn't you have to sign off on this or acknowledge the device being installed on the Contract? Asking this now after the fact....... well I understand but OP