P0300 GMC - I don't feel the misfire while driving. Does this narrow the options of what it may be?

Question

I can't feel any misfire and the truck seems to be pulling along just fine. I notice the engine light blink on hills, however. Does this info help narrow down the possible problems that are causing the code?

Answer 1

P0300 Random misfire

Yes it does, when going up a hill , there is more demand for fuel and secondary spark, sparkplug wires, sparkplugs can be leaking secondary ignition at load.

Ignition system such as the coils , sparkplug wires, and sparkplugs, should be suspected when a misfire occurs when engine load is demanded