Can the Dealer Reprogram psi light for lower psi?

redwngr · October 23, 2018

Yes they can.

And fwiw, after it's done, your onstar app/mychev/mygmc/whatever will report the newly programmed numbers as 'recommended' settings.

powerhaulic · November 5, 2018

On 10/23/2018 at 12:48 AM, redwngr said:

Yes they can.

And fwiw, after it's done, your onstar app/mychev/mygmc/whatever will report the newly programmed numbers as 'recommended' settings.

Correct.

Yes dealer can reset the limits, the third dealer I asked finally did it for me.

I went 50psi all around.

I run 60 front and 55-60 rear unloaded

Towing our fifth wheel i run 70 front and 80 rear, @ 24160# gross combined wt. and 2900# on the pin

RyF · November 6, 2018

I was very lucky I chose my SRW 3500HD Denali. The truck was brand new with 39 miles, at an out of state dealer, selling for less than any brand new 2500HD I could find in the region. The 10,800 lb GVWR means I don't have to put up with TPMS (only mandatory for <10,000 lb GVWR vehicles). I didn't know that at the time, which is why I say I was lucky I made that choice. A small number of us on here like it, but the TPMS has been nothing but a pain in the ass for me in the past.

gearheadesw · November 6, 2018

I'v just put on some 285 75r 18 Ridge Grapplers, they showed up with 45 psi in them, and rode nice. Now that I have everything programed and at the right pressures, 58 rear and 54 front, they are stiff at these pressures. I'm aiming at the rear axle nut recall here in a week, and I'm going to really try to get these guys to lower the tire pressure limits for a better ride with no TPMS light on in the dash. Is there a better way to approach the subject that they may be more willing to adjust the limits? State that the tires are able to hold more weight at a lower pressure? If theses guys are unwilling to do it, is a tunner programer the only way to get that dash light to stay off at a reasonable tire pressure?

Any info greatly appreciated.

GTBensley · November 6, 2018

We have an aftermarket scanner at work and I was able to use it to set the TPMS to 50PSI no problem. I would imagine you would have better luck just asking an independent shop to program it.