Tire PSI in new Denali HD
03-15-2015, 07:47 AM
#22
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I have 2015 Denali 3500 crew dually, I run 45 psi in my rear tires when not towing and adjust to the load when I do. I dropped the front pressure by 10 lbs of factory spec for a better ride but it still does not come close to the ride my 2001 8.1 Chevy crew dually has.
03-19-2015, 10:19 AM
#23
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Location: Perry Lake, KS Lake of Ozarks
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Truck mfg "recommended" tire inflation is CYA as much as anything. They recommend inflation for full load.
You can definitely air down which will give better tire wear. Running 70+psi unloaded will usually result in greater tire wear in the center of the tread, loaded the tire will flatten out and wear even.
I find 60psi to be about right with my topper but unloaded.
I could not find a full chart of tire size vs pressure vs weight rating. Attached is a Ford truck link example. This is per axle so cut the weight in half per tire.
http://cimg2.ibsrv.net/gimg/www.f150...0e9df0b167.png
Due to government regulations for TPMS parameters that do not consider the differences between a near constant loaded car versus a variable loaded truck, it will alarm higher than comfortable or (prudent for unloaded trucks).
2015 TPMS is much better than the first years of TPMS with my 2008. I have a dash light at 68psi on the rear. About 2010, they lowered it to a more reasonable level.
IF you are wanting TPMS changed, it is possible but finding someone with a Tech 2 that is willing to do it may be a challenge. The value is stored in the BCM (Body Control Module). Instructions can be found searching DieselPlace.com forum.
You can definitely air down which will give better tire wear. Running 70+psi unloaded will usually result in greater tire wear in the center of the tread, loaded the tire will flatten out and wear even.
I find 60psi to be about right with my topper but unloaded.
I could not find a full chart of tire size vs pressure vs weight rating. Attached is a Ford truck link example. This is per axle so cut the weight in half per tire.
http://cimg2.ibsrv.net/gimg/www.f150...0e9df0b167.png
Due to government regulations for TPMS parameters that do not consider the differences between a near constant loaded car versus a variable loaded truck, it will alarm higher than comfortable or (prudent for unloaded trucks).
2015 TPMS is much better than the first years of TPMS with my 2008. I have a dash light at 68psi on the rear. About 2010, they lowered it to a more reasonable level.
IF you are wanting TPMS changed, it is possible but finding someone with a Tech 2 that is willing to do it may be a challenge. The value is stored in the BCM (Body Control Module). Instructions can be found searching DieselPlace.com forum.
