Do you keep your tires at full capacity? 80psi

redwngr · March 18, 2020

5 hours ago, Booger T said:

I've never had a problem with my dealer changing the settings on the tpms.

My dealer changed mine for me too.

After the change, the phone app shows the new programmed number as 'recommended'.

(When loaded and running higher pressures, I don't get the monitor reprogrammed)

FWIW, the 2500's are typically 70 rear, instead of the 80 rear that is typcal on the 3500's.

Edited March 18, 2020 by redwngr

blamkin86 · March 19, 2020

My Goodyears(?) and 20" wheels on my 3500 AT4 seem to lose a pound or two a week. Going to have to take it back at some point for that and a couple other very little things.

FirstAscent · March 20, 2020

My Goodyears(?) and 20" wheels on my 3500 AT4 seem to lose a pound or two a week. Going to have to take it back at some point for that and a couple other very little things.

All of them!? Or just one tire?

blamkin86 · March 20, 2020

Yep, all of them. Hard for me to believe too.

It came delivered with the LR down to 76 psi. I pumped it up to 81. A week later the fronts were down in the low 50s and rears were both down to 76.

It's much colder out today than it's been, they're at 55 front and 73/75 rear. I checked them on the dash after pumping them up and they were 61/81 before we left for AZ two weeks ago.

SkidooSteve12 · March 20, 2020

2 hours ago, blamkin86 said:

Yep, all of them. Hard for me to believe too.

It came delivered with the LR down to 76 psi. I pumped it up to 81. A week later the fronts were down in the low 50s and rears were both down to 76.

It's much colder out today than it's been, they're at 55 front and 73/75 rear. I checked them on the dash after pumping them up and they were 61/81 before we left for AZ two weeks ago.

My January OnStar email shows that my tires went down from 60 psi in September when I bought the truck, down to 48 psi in both front tires. And the rears went down from 70 to 58 left and 60 right.

Sounds like it is just temperature related in the loss of psi.

blamkin86 · March 20, 2020

I'll see if they come up next week. They did not go down when I was in the snow in Arizona last week.

It does not seem like a temp issue to me, but I'm hoping you're right.

swathdiver · March 20, 2020

6 hours ago, SkidooSteve12 said:

My January OnStar email shows that my tires went down from 60 psi in September when I bought the truck, down to 48 psi in both front tires. And the rears went down from 70 to 58 left and 60 right.

Sounds like it is just temperature related in the loss of psi.

Don't forget the sun. The left side of my truck gets more sun in the driveway. So "cold" pressure on the driver's side is always higher after sunup then the passenger side. Once on the highway and heated up, the tires are all the same. Well, that is unless of course one side see more sun for a prolonged period of time! LTs are more finicky than P-Metrics when it comes to air.

I had to adjust the air more frequently when I ran them at or near rated capacity. Now that we dropped them a few pounds, they stay at the set pressure much longer, months longer even.

Edited March 20, 2020 by swathdiver

Big Whiskey · March 22, 2020

My dealer reprogrammed the TPMS on my last two trucks, but refused to do it on this one. So, I run 50-55 psi all around for a while, and ignore the warning light. Eventually, I get tired of the light, and bump the rears up to 62-65ish just to make the TPMS happy. When I get tired of the firm ride, I drop back down to the 50's and start the process all over again, haha.

greatmizzou · March 25, 2020

Factory set 60 front 80 rear

No plans to change, rides just fine.

FirstAscent · March 26, 2020

Factory set 60 front 80 rear

No plans to change, rides just fine.

I put my rears at 65 and it made a difference. Even at full capacity 80 isn’t needed. But if it’s comfy to you then nothing to worry about.

I’ll bump mine up when I start towing consistently. But even at 65 I have more than enough and it makes it a little less rough in the rear.

Ray Pickle · April 1, 2020

Hnmm, my truck with 20" wheel shows 60 fr 70 rr spec.

MTU Alum · April 1, 2020

The tire pressures are same between 18 and 20 in tire. 60 front 70 rear for 2500, 60 front 80 rear for 3500.

#iworkforGM

swathdiver · April 2, 2020

On 3/21/2020 at 8:22 PM, Big Whiskey said:

My dealer reprogrammed the TPMS on my last two trucks, but refused to do it on this one. So, I run 50-55 psi all around for a while, and ignore the warning light. Eventually, I get tired of the light, and bump the rears up to 62-65ish just to make the TPMS happy. When I get tired of the firm ride, I drop back down to the 50's and start the process all over again, haha.

For about a $100 you can do it yourself and have full, dealer level diagnostics and testing at your fingertips. VXDIAG NANO with GDS2 software.

Dunn · May 7, 2020

2500 was 70rr and 60frt.....I dropped to 55 on all 4 corners and no alerts or warnings....it does help some though but still could be better....since I don't need payload rating all the time ill just throw 500lbs in back and yank it when I need ability.....

Edited May 7, 2020 by Dunn

rongotti · May 7, 2020

My dealer reprogrammed the TPMS on my last two trucks, but refused to do it on this one. So, I run 50-55 psi all around for a while, and ignore the warning light. Eventually, I get tired of the light, and bump the rears up to 62-65ish just to make the TPMS happy. When I get tired of the firm ride, I drop back down to the 50's and start the process all over again, haha.

I would drop by Discount tire, they are usually awesome about stuff like this, and they want your future tire business, so most of the small stuff they do free of charge.

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