Had a weird one happen a few years back. On a trip from Ontario, Canada to Arizona we took the I-80 to I-76 to I-70 route. After we passed through Denver, we saw and decided to check out the Buffalo Bill grave site just up I-70 as you head into the mountains west of there. When we parked our older Roadtrek, on a Chevy Express 3500 van, and tried to use the factory fobs to lock/unlock the van's doors, they wouldn't work. No lock tumbler clicks, nothing. We had to use the keys to physically lock/unlock the doors while we were stopped. We figured it must have been the iron or other metal ores in the mountains somehow blocking/suppressing or otherwise interfering with the transmit/receive signals from the fobs. Once we got back on the road again, they were fine. Remote control resumed.
Mike. Comments are anecdotal or personal opinions, and worth what you paid for them.
2018 (2017 Sprinter Cab Chassis) Navion24V + 2016 Wrangler JKU (sold @ ????)
2016 Sunstar 26HE, V10, 3V, 6 Speed (sold @ 4600 miles)
2002 Roadtrek C190P (sold @ 315,000kms)