Thanks again, I think I will have to tear it down again and double check everything and this time install a new oil pump while I am at it. It does have 130,000 miles so the pump could be worn, but first I will check the oil pressure with a regular pressure gauge. I will not be happy if I purchased a bad phaser, but that is very possible, but it was brand new, and I blew light compressed air in the inlet hole and it worked properly, so hoping that maybe oil pressure is not strong enough to move phaser and I don’t have to get another one. The timing when accelerating does top out at 25 degrees and like I mentioned it will go down to 4 degrees when rpms come back down to idle, but slowly move back up to 11to16 degrees when idling, so my thoughts are oil pressure is not strong enough to fight the spring pressure and hold it down to the 5 degrees at idle , I believe the timing is supposed to be at idle. One other thing I read one guy on this site doing a timing chain on the same year Trailblazer, 04, he said he set the black links on the timing chain to all the proper marks, then manually turned the engine over, and for each 2 rotations of the crank, (one rotation of the camshaft) the black links would be one tooth off from the marks, so it would take 14 revolutions of the crank to get all of the black links back on all of the marks, this was the same situation I had, I didn’t see anyone answer his question on this, so do you know if this is what is supposed to happen