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2016 Sierra 2500 HD tire pressure

gmacecsko

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gmacecsko Enthusiast

gmacecsko

Posted
Posted

I was wondering if dropping tire pressure when not towing would improve the ride. Any doing this ?

Cowpie Senior Enthusiast

Cowpie

Posted
Posted

Sure. Many of us do it. I run 55 psi all the way around all the time when not hauling or towing heavy. Some run lower than that. Same principle that commercial semi trucks use.... base tire PSI on weight of loading. At least the commercial tire folks have recommended charts to do this and make it easier to get proper inflation for load. The auto and pickup OEM's are two dimensional and think everyone is at max gross all the time. Their recommended pressures are for max gross loading, not empty or light loading.

 

As a side note, I believe that mpg is slightly improved and tire wear reduced when running lower pressures when empty. Less tire hop on road bumps which equates to less micro braking and adjustments made via the anti-slip electronics. Tires are designed to help absorb road shock. Too high of inflation for the load and they cannot do that well and pass the shock onto the suspension components. From a safety standpoint, having the proper inflation for the load, in this case lower than OEM recommend when empty, also improves overall handling and braking.

Cowpie Senior Enthusiast

Cowpie

Posted
Posted

I don't even worry about the TPMS having a fit. I dismiss the warnings in the DIC and only concern myself with the tire inflation. I ignore the TPMS just like I ignore the seat belt warning crap when I am driving around the farm property. The light on the dash doesn't concern me one bit. More of a comedy moment for me to remember how lame the thinking is at the OEM and their one size fits all mentality.

KMGZ400 Senior Enthusiast

KMGZ400

Posted
Posted

With a Tech 2 you can change the threshold as to what PSI the TPMS light goes off, a local dealer did it for free on my truck

Adamrg Enthusiast

Adamrg

Posted
Posted

With a Tech 2 you can change the threshold as to what PSI the TPMS light goes off, a local dealer did it for free on my truck

Finding one that actually knows what that means is difficult in this area. My selling dealer actually understood what I wanted, but wouldn't do it for legality reasons. Being an employee wasn't an advantage in that instance.

I don't really care, eventually I'll find someone that can and will do it, I have enough gm tech acquaintances, it's just not super high on my list right now. I just ignore the light.

SouthpawHD Enthusiast

SouthpawHD

Posted
Posted

I run mine around 57-60 during the winter months and add about 300 pounds of sand tubes in the bed. The ride improves nicely.

 

During the "towing season" I run around 65 in the fronts and 70-75 out back.

MotionMan Enthusiast

MotionMan

Posted
Posted

I run mine at 50 all around. That trips the rear but not the front. I wish I could get rid of that whole system, I just dismiss it too. I don't care if it eats my tires, the sooner they go the better, no more pizza cutter tires.

Skeld Enthusiast

Skeld

Posted
Posted

Yeah you can go down to 50 PSI on the fronts and 60 on the rear. I assume maybe it can dip briefly below that because of cold and not set it off also. Haven't experimented with it too much yet. But I've been running 50 front and 60 rear. Hoping it doesn't cause tire wear issues but at 5,000 miles it seems fine.

Cosmic Charlie Enthusiast

Cosmic Charlie

Posted
Posted

Yeah you can go down to 50 PSI on the fronts and 60 on the rear. I assume maybe it can dip briefly below that because of cold and not set it off also. Haven't experimented with it too much yet. But I've been running 50 front and 60 rear. Hoping it doesn't cause tire wear issues but at 5,000 miles it seems fine.

 

About same here for 12 years & 3 generations - all good - I get about 70,000 miles out of my OEM Mich LTX2 Tires, - with about 250 lbs in the bed year round - good ride & decent tire wear with rotations

  • 3 weeks later...
2018GMC Senior Enthusiast

2018GMC

Posted
Posted

Is TPMS still optional or not required on 3500HD trucks? SRW and DRW. It used to be on GMT900 platform.

Cosmic Charlie Enthusiast

Cosmic Charlie

Posted
Posted

Is TPMS still optional or not required on 3500HD trucks? SRW and DRW. It used to be on GMT900 platform.

No Available on 3500 -iirc - no sure if you can add it by reprograming and adding sensors

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