Keys fobs dont work..suddenly?

[Lowboy44]

Neither key fob will work..worked fine yesterday. no lock/unlock nothing..

any ideas what went wrong on my 2007 Tahoe

Thanks

 

[NASTY GM]

I had that problem a while back. I had to take it to the dealer for them to reprogram. Took like 5 minutes but they charged me $135

 

[Abn Panzer]

Try pulling the DSM Fuse and reinserting it.
I had an issue with my 07 that prevented the remotes from opening/remote start etc. the issue is aparently not that uncommon and the RCDLR ( remote control door lock receiver) going into sleep mode. I found an older (2006/7) post that offered this fix and it worked for me.
At a minimum... i'd try this 1st as oposed to paying $100 +/- to a garage.

 

[Diamondwolf]

Battery. Check for moisture?