No crank help(solved)

[Failblazer89]

First off new to the forum.

Ok so it's a 2004 trailblazer LS with the 4.2L no mods.

I went out to start it forgot something turned it off so the engine ran for 3-5 seconds. Came back tried to start and no crank, lights on the dash come on but that's it not even a whimper from the starter. Other weird thing is the windows and doors don't work neither does the key fob. Radio doesn't work. You can set the clock and eject the cd but it won't turn on. You can however roll down the back windows using the back window switches. I've already changed the:
Battery
Negative cable
Megafuse 125a
Ignition switch
Starter relay
I've also gone Thur and checked grounds and check connections. Any thoughts or suggestions am I missing something. Or is the pcm fried?

 

[Mooseman]

Hi and welcome to GMTN

This was just recently discussed here:
No Crank, Like Attempting To Start In Drive

The video linked in that thread is pretty detailed as well as the other stuff discussed.

 

[Failblazer89]

I solved mine. It was different than other people's. mine was the radio. Pulled the fuse under the backseat and got the PRND321 before there was no line, and it also started right up all the other faults went away

 

[Mooseman]

So the radio was FUBAR`d and screwing up the data bus? First time I've heard of the radio preventing the engine from starting.

 

[Failblazer89]

I looked deeper into it. I have a Isimple connected that bridges with the stock stereos connectors so I can use an aux cord thru it it never gave me any trouble until the other day plugged the stereo in with out it and everything is fine, car starts radio works no issues. My advice don't buy this product.

https://www.amazon.com/dp/B00B54SJIK/?tag=gmtnation-20