First I need to tell you something about my vehicle

Now I have 1 month Nissan Pathfinder LE 2007 manual transmission.
I'm very happy with it

Now the question. I will buy new tyres General Grabber AT (not AT2).
Dimensions will be 265/65/17 because it is hard to get here 255/65/17 which is original for my vehicle. Soo I will take 265/65/17.
Can you please guys tell me how much pressure should I use in front and rear tyre? It will be loaded with family. Soo 4x of us


I will drive mostly on highway and sometimes offroad.
I see that pressure on my vehicle is front 2.4 and back 2.7bar which I think isn't this to low?
Thank you,