So, got. A call from my Grandma a couple days ago to come pick up my Grandad's '02 1500HD that I've mentioned a couple times in the past. My mother finally returned the truck after being told repeatedly to do so for nearly a year. My Grandma wants to sell it, and although I don't want to, I can't come up with a good reason to keep it other than it's sentimental to me.
Long story short, my mother basically drove it into the ground, and returned it running rough as all hell. Grandma wanted me to diagnose and fix it so that it runs properly when sold. Been tinkering on her the last couple days, and as of today got her running smooth as silk again. The "premium quality" Bosch wires that I installed several years ago just crumbled and came apart all over the place when I removed them to get to the plugs. Now has AC Delco wires and NGK iridium plugs and runs like she's supposed to. Last thing on the list is a new radiator, as there's a slight leak in the driver's end tank.
Overall she's in pretty good shape, just rolled 150k today on the shakedown run for the plugs and wires.