usually can just take the drivers wheel off and u can get the spark plug easily.

Ok I installed the new LIM gasket set and fuel pressure regulator and it started right up. Looks like the regulator was that bad very happy about it! I am going to take new fuel pressure readings in the morning and of course change the oil it'* definitely tanted. Thanks for all the help jwfirebird and to everyone else.

thanks for updating

Realize this is an old issue. But solved my problem last night, just want to share.
The female connection on the ignition module wiring harness seems to cause most problems, either from arcing or in my case one of the four pins not connecting properly. Socket had been pushed down into holder. A two minute fix, started first click, after days of cranking with no fire.
Hope this helps.

Thanks for posting this update- lots of no start issues with the S10s/ Jimmy/ Blazers/ Sonomas. Nice to keep current on the fixes.

A lot of broken wires right at the connector as well. glad you got it fixed.