Tires: Hummer H3 Tire Inflation Gauge, michelin ltx, michelin tires

Question
Hi there!
  I change my Hummer H3 tires with the "LT" type Michelin LTX MS2 but it was originally comes with a "P" type Goodyear tires. Kindly reply if theres a problem on switching from P type to LT type . Lastly the technician just put a 32 psi on the newly installed Michelin tires and i experienced to much vibration on the road,can you tell me the right gauge that i should put on it do i really need to follow the OEM sticker.  

Answer
Joselito,

I am not a fan of replacing "P" type tires with "LT" type tires and here's why:

Assuming your Hummer came with P265/75R16's and the tire placard says the inflation pressure is supposed to be 30 psi, then in order to carry the same load, an LT265/75R16 needs to use 49 psi.

This has all kinds of implications for ride and handling.