I had the dash light come on, activated On Star (which I had at the time) and they told me what was up. I found that, on a blacktop expressway, at expressway speeds, in the summertime, when the sun's out: That 38 psi can climb far enough to trigger the system. When I got the truck I found the tires at 38 psi all around.
Came that way when I bought the truck, I asked about it here, and a number of people do. Gives you enough warning to find a safe place to pull over.Ĭlick to expand.I always run mine over-inflated, as well. It has saved my a$$ twice while on long road trips. TPMS can be a PITA sometimes, but is a valuable system to have.
Some of the aftermarket systems use actual TPMS sensors and others have sensors that install in place of the valve caps. I have seen them for as cheap as $100 and up to $300. You will get (4) tire pressure sensors and a stand alone unit that can monitor the pressure wirelessly. However, there are after market systems that you can purchase. Without the DIC, all you would see on the dash is the TPMS light come on warning you that one or more tires have 25% lower air pressure than what is recommended.
I have the TPMS and even with the OBDII adapter, I cannot see tire pressure, only with the DIC. If you have the TPMS system, the RPO code will be UJ6. Open the glove box and look at your build data plate. I believe the TPMS system was introduced in 2006 on our platforms. If your vehicle is not equipped with the system and TPMS sensors in the tires, you will not be able to monitor tire pressure via the DIC.