2008 cadillac sts

[randeye100]

The tires on sts (all) are continually loseing tire pressure. Do not understand how all of them should be doing this in 30 days +-

[MrCritical]

Changing temps can be the culprit. Also someone could be letting your air out (a prankster). Stems could be leaking. Get the tires checked.

[NHRATA01]

Have one of the tires pulled off the rim, and check for corrosion. I had an issue with my previous '03 SLS where 2 rims had a slow leak I could not find in the tread or sidewall. Pulled the tire off and found tons of corrosion inside the aluminum rim at the bead surface. Cleaned it with a wire wheel, applied bead sealant, and the leaking stopped. 3rd wheel developed the same problem about a year later and addressed it in the same manner.

[GM Customer Service]

Randeye100, if you would like me to investigate further for you please don't hesitate to send me a direct message anytime. (Including the last eight of your VIN would be very helpful.)

Best,

Katie
GM Customer Service