I was an ASE Tech beginning in the 80s. I worked on a lot of these trucks new. I had an 88 S10 last week that had a bad fuel pump. A fuel pump, filter, relay, oil pressure switch, ignition control module, PCM, 3 fuses, a fusible link, two grounds, a battery, 6 vacuum hoses and 8 days later I drove it out of my pole barn and into the yard, and not in that order. Three wrenches and a 10mm socket that were laying on the radiator shroud also disappeared, and I suspect the truck knows where they are at.