Help with rear brake question

[Lungs414]

20 Laramie etorque , changed the rear brake pads and rotors. Used the menu to retract the emergency brake. No issues replacing the pads. After they were completed I applied the pedal and engaged the emergency brake. Heard the EB motors doing their thing. Drove it no issues. The next morning I hear loud squeaking coming from the rear wheels, when applying the brakes noise goes away then returns when I take foot of the brake. I pull over and do the procedure again, all good. The next day same thing happens again.
Any idea what can be wrong?
Thanks in advance
Apologies I think I posted originally in wrong section.

 

[Scram1500]

What pads and rotors did you use? Use any grease on the backside of the pads? Sometimes they just need to seat properly before the squealing goes away

 

[Lungs414]

Power stop and yes did wire wheeled behind the new rotors and cleaned a greased where appropriate. Slide pins, behind pads, new hardware. I disconnected the negative for a minute then reconnected. It seems ok now but I have to wait to see if it locks up again overnight.