Has the vehicle been scanned for codes? Especially "B" and "U" codes?

After the sensors were installed, were they programmed and did they work? Did a GM shop do this? Did you buy the sensors from a GM shop? It'* imperative that the sensors be the correct number....

I assume you are getting dashes where there should be tire pressures? Do pressures display after driving the vehicle for a few miles? Then do they go back to dashes when you restart the car?

Have you checked the fuse for the RCDLR(remote control door lock receiver)? It'* the DSM 10A fuse....

Another possibility is a bad RCDLR.....

All the sensors were the correct ones, they worked for about a week or so after install then all stopped at the same time. And all the fuses are good, i have checked all of them multiple times, even changed them out with new ones and still nothing. The keyless entry would work on occassion, but now it does not work at all. I have changed the batteries several times but nothing.

also, the keyless entry seemed to stop working around the same time the tire sensors quit working

Sounds like it is time to check for codes like Tech II recommends.

oh, and the dashes are there all the time. i have checked for codes, and none pop up. I'm really stumped

Are you able to talk to all the modules?

When making a title for posts, please do not use simple words like 'stumped' or clueless. Please use describing words.