Made a few upgrades to the GMC this morning. It has been randomly dying on me after driving for a while when it’s hot out. Not overhearting dying, but either fuel pump or ignition related. I have a brand new Holley pump on her, so I was pretty sure it was the ignition coil. I picked up a new MSD and installed it this morning.

I also flushed the coolant system and made a new overflow tank.