I have a 2018 LT and my buddy has a 2018 WT custom. The custom type of radio can pick up the 300's but the LT radios do not. We have the same level of XM subscription. I have told many of my customers this. - Former Chevy sales consultant
I got power locks on my W/T (GMC) but the power windows itself was an extra $900 so when I ordered it i just decided to stick with the old fashioned way, one less thing to go wrong.