Sam's Club charged $35 each, installed. Yep, including wheel and tire R&R and balance. They couldn't managing re-syncing them, tho, so it was off to the dealer.

I just had them replaced on my Sierra. That's how it starts. Intermittent drop out. After a while one will fail. Then if you rotate tires you can't sync them anymore.

Oh my. Not the dealer for this. It's a very easy process. Takes less than 10 minutes.

The 2011 requires the special tool to set positions; tire stores should be able to do it by now. The tool is really cheap now, used to be expensive.

The system was changed sometime in the 2010 model year. So SOME 2010's need the tool. It is the RCDLR programming that changed not the TPMS.
2008 models had a programming glitch that caused the RCDLR to develop a case of dementia if the battery was disconnected for too long; This is fixed with a software update.

I bought one of those tools to relearn positions after a tire rotation, for Sweetie’s new ride, it worked great! $6.90 on eBay

Nice score, My lil sister's hubby had to get a tool like that for her 2014 Buick Regal, w/2.0 turbo. But he got it from Amazon for about $12. Doh !!

In 2012 they were $85, I dumped mine on eBay for $65 after shipping and fees in 2016.

Yea, prices always seem to be much higher when something is new to market. You did good Don.

Just went through this on my ride. Turned out that 2 of the 4 were bad right out of the box. They were only 6 months old. Replaced those today... shop has a lifetime warranty on all their parts.

You have a link to this ?

Really tough to type "chevy tpms tool" into eBay search. https://www.ebay.com/sch/i.html?_fro...+tool&_sacat=0