I changed out my heater core and I have these 2 plugs hanging and the truck won’t start.

Ty here are the 2 plugs that I can find a home for. Can anybody help?

 

What were their plugged into when you removed them?

 

Keep looking. They only reach so far so that limits the area to look in ..... Hope they do not go to something on top where you have to partial disassemble to plug them in first before final assembly.

Wish I could help more, I will be on the side lines rooting for you though.

 

They go into the interior side of the fuse box/"Junction box" on the door-side of the dash panel. They are color coded and keyed.