i don't know hardly anything about the tire read out light
i do know about tire pressures though, the tire pressure should be set to the normal load that your vehicle carries, if you run with your bed empty most of the time, then your tires would only need 34 - 35 pounds of pressure, if you carry about 1/2 ton of tools or material in the trucks bed, then you would want to run 40 pounds, the numbers on the tires are for MAXimum tire pressure, the stamping or tag on the vehicle itself are only for the original tire size & type, so if the size & type has been changed, you may need to ask a tire guy, discount tire has a chart that they refer to
here is a reference for you...
http://ask.cars.com/2007/05/how_do_i_find_t.html
i do know about tire pressures though, the tire pressure should be set to the normal load that your vehicle carries, if you run with your bed empty most of the time, then your tires would only need 34 - 35 pounds of pressure, if you carry about 1/2 ton of tools or material in the trucks bed, then you would want to run 40 pounds, the numbers on the tires are for MAXimum tire pressure, the stamping or tag on the vehicle itself are only for the original tire size & type, so if the size & type has been changed, you may need to ask a tire guy, discount tire has a chart that they refer to
here is a reference for you...
http://ask.cars.com/2007/05/how_do_i_find_t.html
