Two days ago the service TPMS message came up on my Yukon and the front tire pressures weren’t displayed any longer. Today I tried doing the TPMS relearn and I wasn’t able to get the front sensors to beep. After some driving around, the rears stopped reporting so all four tires aren’t showing readings. It seems strange that I lost two and then pretty rapidly, the other two. It doesn’t seem like all four sensors would quit at roughly the same time, so are there any modules that could cause this?