silvertxedition

2008 GMC Sierra Texas Edition. The other day my TPMS came on and it wasnt reading the RF tire. When I restarted the truck everything was working but came back on after driving about 30 minutes. I took it to a local tire shop and the reprogrammed/relearned the tire censors and it seemed to fix the problem. A day later TPMS came back on but now the LF tire isnt reading. It works fine when i start the truck up but again everyday like clock work the TPMS comes back on. Does anyone have an idea what this is? Ive read a few things some say the RCDLR needs to be reprogrammed with updated software.