This is not really a diagnosis thread... But have you considered your battery?

 

Hey new here just bought my first jimmy! 97 4door red 4x4 with 105miles or 170km (I'm Canadian) jimmy is in near mint shape minus a dent on the drivers fender

 

169,734 as of this morning

 

My 93 S10 Blazer made 247,000 before it became unreliable. It will still start and run but after a minute or no more than 10 it just dies. Everything except the spider has been thoroughly checked or swapped for known good parts and fuel pressure is good before, during and after it dies. Sometimes will fire back up immediately, sometimes not. Spark good before, during, and after it dies also. Engine has no leaks and still uses no oil.

Over the winter it will be de computerized with new Edelbrock manifold, Holley carb, and non computer distributor.

 

My 2002 Blazer with original engine and Tranny 369825kms as of today, just keep up with the maintenance, runs fantastic

 

That's the best thing I ever did to our '00 4.3 engine - now it's as reliable as a stone ax, and has some damn good power too.

 

I just rolled 460,000 miles on the odometer. This not the original motor and transmission though. But it is the miles on the body and chase. This is on my 89 S15 Jimmy that I bought new.

 

I have a 92 with 288+ and a 02 with 144. The 92 has had parts replaced but the main block, pistons, "internal" is all original and the original trans from what I know.

 

I have a 2000 Jimmy with the 4.3l and it has 192k and is still running strong.

 

I am just over 214k on original motor and nv3500 Trans. Minor oil pan gasket leak but that's all