was there a solution to this problem? I have a 2010 gmc sierra 1500 5.3 with the same issues I've replaced damn near everything this guy has and still having problems except my truck doesn't always demand 55psi+ when in wot. starts up with 60-70psi then drops to 42-43 after a few minutes truck has ran like this for about a year and a half now I got it back from the stealership after they replaced to much in the timing chain department and its never felt the same since the test drive bought it and 2 minutes after I left the show room it had a check engine light for timing so I brought it back if anyone has any insight on what I could be dealing with I appreciate the help
