I THINK 88-90(?) or at least 88-89 when you got the GTA package it automatically got the radio controls and maybe the UQ9 audio amp. If you want to pull the wheel and look at the cancelling cam or the turn signal setup it will likely have the extra parts that would be for the wheel controls. I can send you a picture of what the turn signal setup looks like, the cancelling cam has an extra raceway or two compared to a stock one, for the wires for the controls. The turn signal setup has a bunch of LEDs installed on it, I think infra red LEDs, like a remote for a TV etc.
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