Cold morning low tire presure ligh when on

[Hummertech]

Do you have the larger tires? The larger tires are suppossed to hold 35 psi cold. The smaller tires are 30PSI cold. If you have the smaller tires, and the light is coming on at 31 or 32 psi, then it's probably safe to say that your truck originally came with the larger tires, and the dealer did a tire swap before you bought it but did not do the appropriate reprogramming.