Tps sensor

[Sierra1315]

I have a 2013 Sierra 1500 5.3 I keep getting the low tire pressure light on and on the display it says right rear low tire pressure. I checked all tires they all read 35 pounds. If its a bad sensor is it a big money fix. Thanks for your help.

[dsr611]

Cost to replace is the amount of the new sensor ($35-$40 each at Rock Auto) and ever how much your local tire dealer charges to replace them (call around and see who's cheaper).  May as well go ahead and change all 4 of them though, since they are all the same age.  Would suck to get one changed only to have to make a return trip to the tire shop to get another one changed a month or so later.