VortechC5

iTrader: (6)

Does anyone happen to have a extended cab with factory 18s? If you do could you please tell me what the recommended tire pressure is for the 18s?

I just bought a 2011 extended cab standard bed NHT. The dealer threw in a set (for free) of new take off 18s and tires. My truck had the 17s on it so the tire pressure sticker only has the pressure for the 17s.

Mangled03gmc

iTrader: (95)

Look on the tires

VortechC5

iTrader: (6)

That is the max pressure not the recommended pressure.

Black08Chevy

iTrader: (2)

Its usually around 35-36 psi

chevyboy.520

iTrader: (6)

35 would be normal, from 17's to 20's

Allgonoshow

iTrader: (1)

the door post sticker will tell you, I think it's 30f and 35 r
should be the same anyway

limpalong

I have 265/65/18 tires on my 2008 Silverado. Came w/Bridgestones from the factory. Got just over 50,000 on the OEM tires before changing to Michleins. 35 is the recommended tire pressure. However, I run mine at 37 to 38 during the summer (checked when cool). Winter time I run mine at 39 to 40 psi. If you run 35 in the winter, and live in a cold climate, you will see the pressure drop substantially on cold mornings. I seem to get better mileage and better tire wear if I run just a little over the recommended.
The TPMS system is awesome!! I'm OCD about watching my tire pressure on the DIC.

Red04Silverado

iTrader: (2)

I work for a GM dealer. All the trucks that come in with factory 18s run 35psi. My 07 came with 17s from the factory rated for 35psi. When I swap over to some GM 18's I just keep it the same. No problems here or uneven wear.

VortechC5

iTrader: (6)

Thanks for the replies everyone. I'l start at 35.