2015 GMC sierra denali 6.2l oil pressure

[tonyyyy]

Had my engine rebuilt (including oil pump) 30xxxkm ago, oil pressure would be around 275kpa (40psi) most of the time, would never drop below 1/4 (20psi) but I got the code p06dd for the last couple weeks on and off, decided to change my oil and filter a little earlier (40%left) and pressures were still the same. (20-40~psi) but today I changed my vacuum pump and my oil pressure at idle is maybe 10psi and driving doesn't go over 35-40psi. Code hasn't came back since oil change (1000km~)

 

With a fairly new pump, (gm genuine) are these oil pressures anything to be worried about?