Would warped rotors cause a vibration....bout 70 mph blazer starts vibirating real bad and wheels get hot

 

Usually the other way around. Calipers that dont retract properly heat the rotor.

If the rotor was actually warped, and the calipers allowed pads to retract then there would be no heating and vibration would only happen when you applied the brakes.

 

When my calipers are getting hot they stay engaged when they cool they retract..have replaced master cylinder hoses now the whole abs module.....so frustrated what should i try next...the wheels on both sides are locking up

 

I have no idea... well, not sure, anyway.
Logically the only thing I can think of would be the pin out of the booster is too long {compared to Master cyl piston position}

If there's an adjustment on the end of the pin, turn it in 2 turns, to shorten it and see what happens. Pedal at brake engagement will drop, of course.

 

Thouggt master was nit releasing so hasbeen replaced twice now

 

That is exactly my point. Please read my post again.

If you want to understand the dynamics, here.. read and understand this brake training document.
http://www.autoshop101.com/forms/brake05.pdf
I know most folks dont want to be mechanics but you would be surprised how handy it is going forward.
Most hack professional mechanics dont even bother with this and it's critical.
And btw.. this might be for Lexus but it's universal in principle.
Example:
Is there a gasket on the seating faces now?
Was there a gasket on the original configuration?
What is a possible result of eliminating the gasket?

 

Do the front brakes usually get hot

 

It's not unusual for them to be too hot to hold your fingers on the rotor when braking from highway speed. But you should be able to touch the calipers without burning them.

Is there something you dont understand.. we've established they are overheating? Now we're trying to figure out why. Dont go backwards.

One more time..
Pull the the master cyl away from the booster, turn the adjustment screw/bolt in two turns to shorten the engagement rod. See what happens.
If the problem goes away or gets better then I'll explain it if necessary but the link also explains it.