I have a 2024 Trailblazer with 1500 miles on it (sat on the sales floor for a year). Looking at the maintenance dash the left two tires are maintaining 34 PSI. The right two have gradually decreased to about 30 ish PSI over the last few months. How dependable values using the dashboard? I know that I should use a gauge on the tires directly and plan to do that but are there know problems with the vehicle monitor system? Vehicle is driven very conservatively. I have no idea how tire pressure is measured electronically by the vehicle. Is it just a guess the computer makes?

 

The chevy dealership or any "up to date" mechanic should be able to plug diagnostic computer in and tell you if the TPMS (tire pressure monitoring system) is bad on that wheel. I have an older Chevy that all four failed. Too expensive to replace right now so I roll the old fashioned way. Check air every couple weeks and look every day. We did it for years.

 

The chevy dealership or any "up to date" mechanic should be able to plug diagnostic computer in and tell you if the TPMS (tire pressure monitoring system) is bad on that wheel. I have an older Chevy that all four failed. Too expensive to replace right now so I roll the old fashioned way. Check air every couple weeks and look every day. We did it for years.

 

thank you

 

Rotate tires and check if issue follows tires. they will need to be relocated to new position on truck. google or take to mechanic to update position,