That's about 4-5 build versions old if you have the 8 inch IOS or IOT radio. V155 is the number that tells you what version of software it has. Newest IOS/IOT radio software is V171 which was released June 2024.
You'd have to pay out of pocket for the update at the dealer. TSB on the current software is 24-NA-108. MC-11004657-0001.pdf
You'd be the first to make it happen if you tried it that I know of.
You'd have to order a pair of option code DLF mirrors for a Chevy HD truck, and then attempt to swap all the components from those LTZ 1500 mirrors you bought on to the DLF HD mirror mount.
If it would work.
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