Henry Daugherty

I bought an '18 Sierra about 1 month ago. when I test drove, the dash speakers were crackling. I had them replaced by the dealer, and they worked for about a month/ 2k miles. Then it started up again out of the blue. It only happens when I listen to really full, bassy music on certain notes (glass animals - Helium). I speculate that since the replacement speakers did the trick for a month, its not necessarily a wiring issue, or maybe even an amp issue. I estimate that it may be a filtering issue. I think the frequency getting to the dash speakers goes too low. Im going to attempt to get a new pair o higher quality speakers and add a high pass filter. anyone that has intimate knowledge of this issue have any thoughts?