Hello

I have a bad glow plug relay. Can I use a regular starter relay and plow relay? Thx for the feedback

 

no, they are different. you need to get a glow plug relay.

 

If you have a NAPA store near you, ask for a GPR109.

 

If you are running a manual pushbutton for your glowplugs, you can likely use a starter, or plow relay.
However, for the stock system follow the advice above. I would read through whichever sticky on glow plugs fits your truck.