The aux in for the Tundra is a female headphone jack, the same type for example that is on an ipod. So if your satellite radio has rca outputs, you would need an rca to male headphone jack adapter.
i didn't know our trucks have 1/4" jacks. i only see the 1/8" jack labeled AUX.You can buy that adapter at Radioshack for like $3...sorry, but I just wanted to make sure everyone knew where to get one. That stuff can be hard to find when you go to Best Buy and say "I need a male RCA to male 1/4"". I can imagine the response from the kid "We don't carry RCA -- we haven't had that in like, a year or something."
Also, if the 1/4" input is stereo compatible (which I'm pretty sure it is), you may need a special mono RCA to stereo 1/4".
Last question, then I'll shut up and mind my own business, but does your satelite radio have more than one RCA output? I would think you'd have two outputs, one for each channel, but maybe I'm missing something (I've never had one myself).
Hope that helps.
Yes, you are correct, it is a 1/8" jacki didn't know our trucks have 1/4" jacks. i only see the 1/8" jack labeled AUX.