As per the title, my 02 blazer was last started on December 27 and it ran just fine. I went to start it on Sunday 1/17 and when I turned the key all the electrical stuff came on, including the headlights. However there was no crank from the engine at all. I suspected the battery was somehow drained, so I took it today to be tested and charged at O'reilly's. It tested ok but a little low so they charged it. I just installed it and same thing, no crank no start, no nothing. I don't hear the fuel pump kicking on and I just replaced it with a genuine AC delco in October. Any ideas of where I should start?

I found this strange device under the dash.

Here's the fuses and relays, it all looks good

 

That is an audiovox remote start bypass which has a high probability of being involved in your problem. I would measure the input side of the 10A Crank Fuse in the underhood fuse block during a start call from the ignition switch and see if you have 12V.

George

 

You can also see if you have 12v on the pink wire into the Ignition Control Module with the ignition switch in the run position.


George