Proper tire pressure for 2010 CM Platinum?

Hi All,

Can anyone tell me what my tire pressure should be set too? I purchase 275/55 R20' Michelin tires from Costco, and I noticed, they set my tire pressure according the tag inside the door hinge, which is 30psi in the front, and 33psi in the rear.
When I take my truck to the dealer for a oil change, I noticed the ride of my truck changed, doesn't ride as smooth. That's when I noticed they changed my tire pressure to 36psi on all four tires.

So my question is, which tire pressure should I be using?






Note: I also have the 5100 adjustable shocks front/rear on my CM.


Thanks!

 

Run the pressure on the tag. That what it's designed to be at for normal driving. Adjust as necessary for towing, offroad driving etc.

The tag is there for this exact purpose.

 

I have the same tire, in the same size on a 2015 Platinum Crewmax. 30/33 is too soft and made for some strange wear on my fronts. I currently run mine at 37 front and 35 rear, but I'm still tweaking them to find the sweet spot.
I suggest starting with 34 all around and do the chalk test everyone recommends. I wasn't satisfied with the results of the chalk test and I go by the seat of the pants test, and continue to watch for wear.