2011 5.3l Oil Pressure Low?

[iamtron]

I just got my new 2011 GMC with 5.3l. I have the same experience with the oil pressure dropping to around 20 during warm idle. At first it concerned me because my 2001 5.3l didn't do that. But all seems well and glad to get the information from this thread.

[Machster69]

2010 sierra 5.3, same song here! Service bulletin

Pip4158c(google) and ull be alil more worried

[Machster69]

Anything new on this, my trucks been to the dealer twice and of course they give me gm specs and say its ok.... BUT WHY DOES MY 08 YUKON LY5 IDLE AT 40? And my '10 sierra lmg idles at 25? THATS HALF!(almost)

 

I cant imagine this is normal but Pip4158c(now updated to d) only covers aluminum blocks.... Anyone figured this out?