Light Load Tire Pressure

[RUSSELL5000]

When I received the truck from the dealer this spring the tires were inflated at the light load setting. The tires remained at that inflation level during our initial 2,000 mile round trip to Florida. I increased the tire pressure when I began towing the travel trailer.



Everything to tow is now put away until next May. So, on Sunday I looked at the label on the driver side door post and lowered all the tire inflation levels to the light load setting. Now I can’t get rid of the error message on the EVIC and idiot light. I have read the owner’s manual and no matter what I do with the light load inflation button on the dash, the error remains – it will not move from maximum load inflation.



Does anyone know what I am doing wrong? Is this worth bothering with?



Thanks!

 

[Jim W]

Russell, I hate my TPS system on the my 08 2500HD truck. When I run the rear tires at 45 PSI according to the door label the light will come on and the chime will ding. I now run the rear tires at 50 PSI and everything is good to go no lights and no ding. I have found that that extra 5 PSI in air pressure will keep the system happy; so this may work for you too.

Jim W.

 

[Joseph Donnelly]

Your dealer can use WiTech to reset the pressures needed to avoid the warnings. Meanwhile, try rkunning the truck over sheets of white paper to be sure the treads are flat on the ground at the pressure chosen.

 

[Newt]

See if you can find a load/pressure chart for your tires. You may be surprised at the pressure required for the load VS what the door sticker says.

Newt

 

[NickSullivan]

I'm grasping here..... but I read something in my manual about window tint affecting the TPMS sensors. You didn't be chance tint your windows did you?

 

[Jim W]

Your dealer can use WiTech to reset the pressures needed to avoid the warnings. Meanwhile, try rkunning the truck over sheets of white paper to be sure the treads are flat on the ground at the pressure chosen.

Joe,

I had that procedure done twice by the dealer never ever worked correctly. That is why I added 5 PSI to the rear tires when I am empty. I do have a compressor at home so it is easy for me to air up when needed and every month the tires on both vehicles are checked for the proper air pressure requirements.

jim W.

 

[Jim W]

See if you can find a load/pressure chart for your tires. You may be surprised at the pressure required for the load VS what the door sticker says.

Newt

Newt,
This does not matter if the TPMS sense a tire out of spec you will get a ding and low tire pressure warning. Not sure on an over pressure warning through?

Jim W.

 

[lawdog1]

Set the rear tires at 50 psi cold for light load. Then drive the truck and it (the EVIC/TPMS) should see the lower correct pressure. My recollection is you do have to push the light load button to get it to reset and the yellow light will then come on. It is particular, I had a simliar experience the first time, put it a 45 psi and it was showing low pressure, took it to the dealer and they explained the process... . seems to work now but I kind of have to re-expirament/learn it each time.

 

[pvanwig]

I have had the warning come on when the dash number was right on. Plus it can be temperature sensitive. I also just put a few more pounds in

 

[Cissco]

If it is stuck on max load. You may have to put the pressure at 60 front 40 rear. Then start truck and wait for low tire light then change to light load by pressing once. When it changes air up to 65 front 45 rear. Hope it works for you.

 

[EDankievitch]

I've found that if you run more than the 60 front 40 rear and someone hits the light heavy load switch the system will not let you switch back in to the light load mode until you lower the tire pressure to the 60/40 pressures. once it's in the light load mode you can air back up. I like the idea of being able to check my tire pressure while driving but hate the way it will not allow you to change from heavy load to light with out dropping air.

 

[RUSSELL5000]

As a few folks above have noted, what ended up working was going low in the air pressure and driving for a while and then hitting the light load button. Once that was done, I added some air. I could not come up with any way to do it other than approach, as EDankievitch notes.

Basically, I have done as Cissco notes; I am at 65 psi to 70 psi front, 50 psi to 55 psi rear when all is said and done (morning temperatures have been swinging a lot lately - when it stays cold I'll be at 65 psi front 50 psi rear).

Thanks, all.