All of my lights on my 03 Silverado constantly flicker when on they also dim when I press my breaks. I have changed the alternator recently trying to fix this problem and it doesn't help.
Usually,this is caused by a loose ground,check motor to frame ground,s.And battery ground all so,not just where it hook,s in to battery,follow it all the way,and check for corrosiion.
I'll try this. Thank you.