This vehichle has what is called a high voltage switch instead of a regular distributer.
Sounds like you have a bad ground somewhere check for corrosion
Hello
The engine
and automatic transmission in this vehicles drive train
are fully electronically controlled by a computer called the PCM and
TCM (Power Train Control Module, Transmission Control Module). When a
problem like this or other drive-ability related problems occurs the
computer stores a record of the problem (there are of course some
exceptions to this, like the fuel pump, engine coolant temperature
sensor and MAF sensor for instance) in the form of a fault code in
its memory, to read these fault codes you must have the systems
memory scanned with a special tool. Once the fault code(s) are read
you then must perform the appropriate diagnostic testing to find and
resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL
A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR
HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM
SOURCE: Why wont my 1996 4.3 gmc jimmy start?
might be ecu fault are there any engine managment lights on dash is there defo fuel getting to engine can you here the pump running just incase its a duff pump if its totaly drained the fuel line it would take a bit to get the fuel to the engine any way
SOURCE: 2000 GMC jimmy with weak spark
i had a friend with the same problem replace the Distributor the 4.3's are known for distributor rusting up on the in side
Car not starting or turning over indicates towards multiple possibilities.
It can be issue with battery or weak battery. But if battery checks out ok, then
it can be starter issue or faulty alternator or problem with low fuel pressure
or no spark at spark plugs due to dirty spark plugs or faulty
ignition coil or injectors getting cracked or dirty and needs to be cleaned.
To confirm the problem, the basic troubleshooting is required.
Click this link below and follow the troubleshooting:------
http://technoanswers.blogspot.in/2012/02/car-starting-issues.html
---------
This will help.
Thanks.
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The high voltage switch acts like a distributer and the timing is not adjustable
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