Lots of vehicles seem to have many things that should be able to be changed that would require only a small change software wise.
For example my cobalt ss had a digital lcd gauge with a few different screens. Like screen 1 displays certain parameters screen 2 displays others but there was no way to have a custom screen with exactly the parameters you wanted.
I think the main reason is because they feel there is no need or competition that would push them to have this feature the other is it may over complicate things , and somebody may make an unintended change they do not know how to reverse , causing extra warranty visits , complaints , and all that extra spending/bad publicity
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