the problem seems to be the amount of channels you have the adapter I linked will work for 4 channel, my truck has 10 speakers so you have to use a dsp I am not sure how these trucks are wired, on the nbs the tweeters are wired in-line with the door speakers, may not be the case on our trucks, on my 18 Silverado all 6 speakers are wired separate so I had to buy a 6ch amp that would split a channel and then another amp for my subs. Then I didn't need to use a DSP I just split the front channel to 4 speakers with the amp, 2 speakers for the rear and added another amp for the subs and retained the factory head unit (for now) so I ended up with 8 speakers. I couldn't use the amp bypass harness because on the 18 the factory headunit gets power from the bose amp, then to complicate shit even more door chimes go to one speaker, bluetooth goes to another speaker, backup sensor chime goes to another speaker lol so I ended up loosing backup sensor chime for now until I replace the headunit. I used hi/low rca adapters and it cost me like $30 plus a amp kit. they make a module for it but it's $350 and I wouldn't need it once I replace the headunit. There may be a module for our nnbs out there with bose I haven't found the right one yet though, all ADs makes in amp replacement is 2014 and up and it only works with specific amplifiers.