TPMS (Tire Pressure Monitoring System). The low tire pressure light keeps coming on in my 07 Chevy Trailblazer and I think I know why. I just discovered that I can access the pressure for each tire by the controls on my steering wheel. Anyway here are the readings. LF-34psi RF-27psi LR-29psi RR-34psi The 34psi tires should be on the back and read 35psi The 27psi and the 29psi tire should be on the front and read 30psi How do I fix this without swapping tires?