I have a 1992 GMC Vandura 2500 5.7L.
A few weeks ago, I tried to start it. All lights and radio came on but it wouldn't start. I tried again a week after that to show my dad but it still wouldn't start. This time the lights didn't come on either.
The battery is fine, reads 12.8 V. We have replaced the starter, ignition switch, ignition lock switch, and a burnt 15 A fuse, but it still won't start. Does anyone have suggestions?