tire pressure
Token Redneck
Joined: Jun 2007
Posts: 9,335
Likes: 344
From: Breckenridge, TX
There was a reference sticker on the b-pillar below the VIN sticker, but sometimes it disappears. 265/70R17s were 75psi on each corner for my truck. 275/65R20s were 65psi for my dad's, and that label lists 65psi for a 275/70R18 spare that matches the factory 18" tire size. To be honest you can run up to the max sidewall pressure without any issues, but some people complain that the truck rides too truck-like when you do that 
You can chalk test the tires (run chalk across the tire, drive a few dozen feet, it should wear off evenly) to reduce the pressure below the max/recommended pressure to make sure the tires are wearing evenly, the rears ofter need to be dropped below the front because of the lack of weight in an empty bed.
Be careful and check the tire sidewalls, if the tires have ever been replaced the new ones might not match the load rating of the original equipment, and you should never exceed the maximum pressure on the tire sidewall, no matter what any sticker or manual on the truck says.
You can chalk test the tires (run chalk across the tire, drive a few dozen feet, it should wear off evenly) to reduce the pressure below the max/recommended pressure to make sure the tires are wearing evenly, the rears ofter need to be dropped below the front because of the lack of weight in an empty bed. Be careful and check the tire sidewalls, if the tires have ever been replaced the new ones might not match the load rating of the original equipment, and you should never exceed the maximum pressure on the tire sidewall, no matter what any sticker or manual on the truck says.
Cargo Master
Joined: Jun 2011
Posts: 2,272
Likes: 208
From: Cincy area
Yeah do a chalk test and run the pressure that makes the tire most happy. For me it was 70 in the fronts and 65 in the rear (unloaded). Dont run more than the sidewall of the tire or less than the door jamb tag.
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