Jump to content

TPMS

Texas Sandman

Recommended Posts

Coby7 Senior Enthusiast

Coby7

Posted
Posted

7PSI below door sticker setting. So if it's 35 it will set off at 28! Also you can get this modified by dealer or a guy like me that has a TechII if it's a 14 or older.

 

IMAG1281_zps0c6ee6aa.jpg

newdude Senior Enthusiast

newdude

Posted
Posted

Anyone know the minimum pressures before the dash alerts you of low pressure warning? Just trying to smooth out the ride a little.

 

On my regular cab, the rears would go to about 58psi before the light would trip. I ran 60psi empty all four corners no issues.

 

7PSI below door sticker setting. So if it's 35 it will set off at 28! Also you can get this modified by dealer or a guy like me that has a TechII if it's a 14 or older.

 

 

On the 1500 sure. The light comes on at a certain percentage below, not a specific PSI. 28psi is 80% of 35psi, so the percentage threshold is 20%. HD trucks are typically 55-60spi front, and 70-75psi rear. So, using 60spi front and 72psi rear (typical combo on some), that means the light would trip at 48psi in front, and 57.6psi rear.

Coby7 Senior Enthusiast

Coby7

Posted
Posted

On the 1500 sure. The light comes on at a certain percentage below, not a specific PSI. 28psi is 80% of 35psi, so the percentage threshold is 20%. HD trucks are typically 55-60spi front, and 70-75psi rear. So, using 60spi front and 72psi rear (typical combo on some), that means the light would trip at 48psi in front, and 57.6psi rear.

Don't know where you got your info but I got this right out of the manual +/- 7PSI from the listed pressure on the door sticker. (Not a percentage)

newdude Senior Enthusiast

newdude

Posted
Posted

Don't know where you got your info but I got this right out of the manual +/- 7PSI from the listed pressure on the door sticker. (Not a percentage)

 

 

On my regular cab HD, the rears would go to about 58psi before the light would trip. I ran 60psi empty all four corners no issues.

 

 

 

 

The HD trucks have a much larger threshold than 7 psi. The 20% deal...28 as a number is 80% of the number 35. So...28%psi is 80% of 35psi, conveniently the difference left is 20%. I only owned a 2015 2500HD for over 2 years. Tire light tripped on at 57psi. Pressure on the door tag was 72psi for the rear. 57psi is 80% of 75psi, giving a 20% gap.

 

OP has an HD thus the 7spi deal does not apply. He has a 20% window of the front and rear. So, using 60spi front and 72psi rear (typical combo on some), that means the light would trip at 48psi in front, and 57.6psi rear.

 

Also...just went through a couple owners manual in my desk. 2007 and a 2010 Avalanche. Zero mention of 7psi or +- 7psi. Only an explanation on how the system works. The GM service manuals don't even mention 7psi.

sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted

 

 

The HD trucks have a much larger threshold than 7 psi. The 20% deal...28 as a number is 80% of the number 35. So...28%psi is 80% of 35psi, conveniently the difference left is 20%. I only owned a 2015 2500HD for over 2 years. Tire light tripped on at 57psi. Pressure on the door tag was 72psi for the rear. 57psi is 80% of 75psi, giving a 20% gap.

 

OP has an HD thus the 7spi deal does not apply. He has a 20% window of the front and rear. So, using 60spi front and 72psi rear (typical combo on some), that means the light would trip at 48psi in front, and 57.6psi rear.

 

Also...just went through a couple owners manual in my desk. 2007 and a 2010 Avalanche. Zero mention of 7psi or +- 7psi. Only an explanation on how the system works. The GM service manuals don't even mention 7psi.

Then that was possibly different for different years...my front and rear seemed to have different trigger points. If I ran less than 65psi in the set designated for the rear, it would pop the low tire pressure warning.

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

Cowpie Senior Enthusiast

Cowpie

Posted
Posted

I run the pressures the tire maker recommends based on the actual axle loading on the tires and ignore the TPMS. I have become very good at ignoring the light on my 2500. I only air up to the 60 front / 70 rear if I will be doing heavy work. I am not sure exactly at what pressure the TPMS will trip. The DIC warns me when I start the pickup. I just take a glance at the actual pressures to make sure a tire is not down and then dismiss the message and ignore the light. I am getting pretty good at ignoring the seat belt light also when I am out on the property and don't buckle up. Doesn't affect me to where I feel the need to try and get the settings changed to match what I am doing.

Chebbyfan Enthusiast

Chebbyfan

Posted
Posted

7PSI below door sticker setting. So if it's 35 it will set off at 28! Also you can get this modified by dealer or a guy like me that has a TechII if it's a 14 or older.

 

IMAG1281_zps0c6ee6aa.jpg

 

I have a 15, and reset mine. I don't think the shop called it a tech2 tho.

  • 1 month later...
Adamrg Enthusiast

Adamrg

Posted
Posted

Not to dig up an old thread, but after a year and a half of ownership, I finally hooked up my dads snap on verus scan tool, and it was able to lower the tpms threshold. Could choose a number of load ranges for the tires, and lower the tpms threshold all the way to 26psi.

Just another option for those of you whose dealers won't recalibrate. If you know of a repair shop with a high end snap on scan tool (other brands may do it as well, I cannot comment on that)

After a year and a half with a light and having to dismiss the notifications every ignition cycle, it's kinda weird not seeing it

SouthernSilveradoGuy85 Senior Enthusiast

SouthernSilveradoGuy85

Posted
Posted

Not sure lowering the psi would give a better ride, just a more bouncy ride, maybe not as bad on an HD than a 1/2 ton. On my '14 1500 when I had it I would keep mine in the high 40s, usually between 46 and 48. Didn't bounce and hop while not shaking your teeth out of your mouth. If you have the psi too low you'll wear out the sidewall of the tires. and that's the last part of the tire you want to fail. Low psi along side dry rot is what causes a tire to blow. And HD just isn't going to ride like a 1500 unless you put airbags on it.

sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted

Not sure lowering the psi would give a better ride, just a more bouncy ride, maybe not as bad on an HD than a 1/2 ton. On my '14 1500 when I had it I would keep mine in the high 40s, usually between 46 and 48. Didn't bounce and hop while not shaking your teeth out of your mouth. If you have the psi too low you'll wear out the sidewall of the tires. and that's the last part of the tire you want to fail. Low psi along side dry rot is what causes a tire to blow. And HD just isn't going to ride like a 1500 unless you put airbags on it.

On an HD it makes a lot of difference...takes it from a harsh feel-every-tar-strip to a more manageable and comfortable ride. Not to mention the DIY can rotate tires without resetting the TPMS every time.

 

I don't regret it, that's for sure...

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

Adamrg Enthusiast

Adamrg

Posted
Posted

Yeah go borrow your buddies hd and take a short trip with the tires at 75psi. Then take that same trip with tires at 55psi. Night and day difference. I don't want a 1500 Cadillac feel, but I don't need to knock a tooth out every time I run over a pebble either ?

Chevor Senior Enthusiast

Chevor

Posted
Posted

I keep all tires at 75-80 psi, two reasons. #1 more pressure mines easier to notice a leak. #2 more time to get somewhere to fix leak.

SouthernSilveradoGuy85 Senior Enthusiast

SouthernSilveradoGuy85

Posted
Posted

On an HD it makes a lot of difference...takes it from a harsh feel-every-tar-strip to a more manageable and comfortable ride. Not to mention the DIY can rotate tires without resetting the TPMS every time.

 

I don't regret it, that's for sure...

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

 

Yeah go borrow your buddies hd and take a short trip with the tires at 75psi. Then take that same trip with tires at 55psi. Night and day difference. I don't want a 1500 Cadillac feel, but I don't need to knock a tooth out every time I run over a pebble either

 

 

I think I must have mis typed or something. I meant I don't think lowering the psi so low that it's close to the dash light coming on saying it's too low. When I was experimenting with my '14 I tried low 50s (it had 18s with factory SR-As) and I thought I was going to lose teeth. I know of course HDs have a stiffer suspension in the rear. I just meant I don't think you should lower the psi so low that the light could come on just from the temp cooling down or something. A truck tire shouldn't be below 35 in my opinion.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.6k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    343,007
    Total Members
    8,960
    Most Online
    Brendan C
    Newest Member
    Brendan C
    Joined

  • Who's Online   1 Member, 0 Anonymous, 913 Guests (See full list)

  • Latest Articles

  • Posts

    • Grumpy Bear
      Joke Thread

      By Grumpy Bear · Posted

    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      You're better read than that Atlas. 😏   British science fiction writer Arthur C. Clarke formulated three adages that are known as Clarke's three laws, of which the third law – that "any sufficiently advanced technology is indistinguishable from magic" – is the best known and most widely cited.   Stribeck and the pivotable Hersey Number isn't voodoo nor snake oil. That part is physics. It's what marketing and bean counters do with it that is snake oil and voodoo.    Stribeck is the relationship between Hersey and the Coefficient of Friction. Within the Hersey Equation if viscosity and viscosity is 'Dependent' on.......heat.......and.......viscosity index or the temperature to viscosity slope.    Specifically Hersey is the viscosity AT THE TEMPERATURE IN THAT LOCATION FOR THAT SLOPE.   Hydrodynamic lubrication exist when the film thickness in the location is 3X the Ra roughness of the surface. This is irrespective of the hardness of the substrate. To obtain that thickness X viscosity is required for Y velocity at Z load. That's a lot of moving parts. It is also impossible to maintain in an ICE but nearly possible with a turbine under constant load.    What does that mean? Error heavy and operate light. Wear is inevitable but the rate of wear and the milage obtainable are a function of prevailing conditions and HABITS. The only penalty is viscous drag and at fractions so low as to be well worth the effort. Double the life, half the manufacturing carbon foot print. Greed is the only impediment.    The materials generated by SwRI are the RESULT not an estimation or a hypothesis.    Don't delude yourself sir, EV's have as many pitfalls as ICE's. We just don't know what they are yet and it will take longer to sort as MARKETING and GREEDY CEO's have had more time to polish the turd they are selling. 
    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      You can always count on greed to prey on ignorance and stupidity.    Friend bought a 2019 Ford Flex and asked me about using Valvoline R&P 5W30 in it. Told him give the miles on it and the fact it wasn't yet using oil that it was a good plan. He uses a Valvoline quick change shop for his oil service.   First they tell him that isn't the oil the OEM recommends. He told them he didn't care what the OEM thought. Then they floated the, "But it will void your warranty"    His reply was it's a 2019, there is no warranty and informed them their knowledge of the law was lacking.    Then they tell him 'But it will ruin your motor"!.    Mine to ruin he says. Finally they give in and charge him 150% the semi-syn price    Point it the brainwash is so embedded that even the service industry is drunk on their swill. The public is right behind them. Echoing the same lies on every forum and media platform. If the end goal is indeed EV then I'd say that ship is about built. 
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      Diesel hit $6.00 here today at the truck stop.   Payed $2.79 for E85 today too.
    • richard wysong
      Electrical Problem - solved

      By richard wysong · Posted

      Thanks for posting, I'm sure it will help someone

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...