GMC Troubleshooting Questions? Ask a Mechanic for Answers
In older vehicles this was often cause by the use of non resistor type spark plugs. I can't speak for sure that it would cause interference with XM but I can definitely screw with standard radio bands. I would suggest checking to see if it had aftermarket plugs of a different type in it. I would also check to see if there are any aftermarket ignition coils. Hope this helps! Let me know what you come up with!
Any luck figuring out this interference problem?
This is kind of a shot in the dark but does it still do it if you unplug the dvd player?
I am thinking that the mobile audio company may have checked their work and it seemed okay but they may not have considered it to be an issue with the unit or something that seems okay to them with their install might be causing an issue they didn't forsee. That being said I've never run across this issue before. If you can get me your VIN I will double check for tsb's that could be related. If your problem still persists with the aftermarket electronics unhooked let me know so I can opt out and see if any of the other mechanics have run into this issue (although it seems unlikely) Good luck!
This is the 2015 acadia denali then correct? The imported message from your last question shows 2008 on my end.
No problem. Sorry I didn't have the go to answer on this one! Lol. That being said I strive to offer the best service possible given a few limitations we have working this way. Please be sure to keep that in mind when leaving a 5 star rating ;)
Btw, I'm not coming up with anything related in tsb's. There are a couple of xm related bulletins but they're for completely different issues.