Not a Blazer but a 4l60 problem just the same
 

06 Tahoe, I know it's not a Blazer, don't shun me lol

Here's what I know, NO power to pin E of connector. IgnO 10 amp fuse is good, pink wire at plug no power.I found it is circuit 1020. No time to run down the entire circuit and I don't have an electrical diagram.
So my question is this,,,, Can't I just run another fused 12v source wire to pin E of the 4l60 plug ? Shouldn't that give me power back to all my solenoids ?
Is there any adverse effect to this type of remedy ?

Thanks for any and all replies Preciatit !!

Lots of views but not a reply yet..I'll wait around for someone who knows more than me to respond..lol

It looks like a pretty simple circuit, so I would think that would work. I would make sure to remove the terminal at the plug and use a new one for the "new" circuit to avoid any future issues with feedback through the original circuit.

You might want to wait for somebody who knows more than I do, though.

Hey Tom,thanks for the diagram,it does show part of the circuit but not down to pin E..I will hang out I'm doing some weed eating at the shop so I'll check back every so and so to see if anyone else chimes in..Tks again for the diagram bro !

Yes you can run 12v from a fused circuit that only is powered when the key is on. Cut the wire that is going to PCM.

Brad

Hey Brad,tks what about pin N do I need to apply 12v there as well ?

No, not needed

Brad

OK then tks for the help

No problem.

Brad

Ok well I have issue still. Ran new circuit and it shifts 1 time then blows 10 am fuse.I moved my circuit to a different spot,same thing.I have these codes po758,po740,po753,po785. I replaced both a nd b solenoids with new GM before I did the new circuit.
Do I have a shorted internal harness ?