Chevrolet Repair: 91 Chev S10 Blazer 4x4 - wont start, oil filler cap, crank sensor

Question
Driving fine this morning, died on road.  Turns over fine, I can hear the fuel pump spin up.  No spark.  No fuel from injectors.  Fuses under dash OK.  4.3L, CPI.

Answer
Hello Rod,
It is possible that the timing belt broke, but pull the oil filler cap and see if you can see activity on the valve rocker arms. If the ones you can see are rocking while cranking, then the timing belt/chain isn't broken, although that doesn't rule out jumping time.
A crank sensor can keep spark and fuel injection from happening, so that is the area I would look...but test before replacing any of the expensive parts.
Van