Hi Everyone

I'm new to this site and I'm hoping for a little help.
I have a 03 Silverado last Saturday I put in a full tank
of gas along with some Lucas fuel saver truck was running fine until
Tuesday am driving home and the truck just died on me, had to tow
it home. Now when I try and start it it turns over and tried to start but just dies. Temperatures over night Sunday and Monday were -25s.
A friend mentioned that my fuel lines could be frozen from the fuel saver, I have no glue if that is possible. It has a new battery and alternator


Any help or suggestions would be great!