P0300 03 sierra 6.0

[Doug_Scott]

4 hours ago, Jsdirt said:

Never thought I'd see a day where auto manufacturers would build wire jacketing that's stronger than the copper strands inside ... but I digress . 

It was pretty common back in the old days with GM pickup coils inside the distributers. The thin wires would look good until you gave a little tug, casing would stretch, then go right back again.  I was always amazed those cars drove in like that.