No crank issue, 96 S10 Blazer Automatic.
This is what I have, new battery but 6 maybe 8 volts on the factory dash guage and 13.5 at the battery. Windows seat etc all work but No crank/start when key is turned. Not a click, nothing ! I have checked every fuse in the fuse panel at the end of the dash and all is good. This is a sudden issue, parked the car, replaced the blower dash switch, the blower resistors, and the temp. twist switch, all for the heat and air. Battery went dead because visor vanity lights did not shut off. Replaced battery, the positive cable terminal and still no crank. What else is in the crank circut ? IGN switch, starter solonoid, neutral start switch and ??? Any relays in the glove box or engine compartment ? Is the neutral start switch under the dash ?
Jim

 

neutral start switch is on the trans

 

Check your grounds and make sure the batt. terminals are tight too. 6-8V on the dash says bad connection somewhere to me.