Both of you missed my point. Not the +/- on the wheel. Read my post again above. This is an item in the menu system under the equalization settings. Here is what I was trying to get at. You set the volume of your favorite mode. Say FM. Now go to siriousXM and don't touch the volume. Go to the sound menu item on the screen. You will see three settings available. EQ settings, Sound position, and SVC. "SVC By default should be 0 on all modes where ever it's available!!!"
Now if on FM to start, leave the volume at the setting you like then go to SAT and go into the sound settings without touching the volume level previously set. Now set either plus or minus in SVC to bring the volume up or down to match the original FM level. (Note: If you go back to FM you will now see that SVC is greyed out meaning this is your base setting mode.) You can do this with the AM and Bluetooth modes also. I think this also applies to a iPod however there is a setting on iTunes and the iPod to equalize the level between songs.
One thing everyone needs to know is this.. SVC is only needed when minor level adjustments between modes is needed. It prevents you from getting blown out of the car after you change from FM to SAT or others.. (Remember the TV Commercial issue's.. walk away from the TV show then a commercial comes on and the volume of the commercial was 20db higher..)
Also remember this: At a default of "0" on SVC, your main volume control dial on the radio head is "0" also.. However, if any mode is set higher than "0" SVC (Lets say +5 in this case for SAT) then the lowest the main volume dial for SAT will no longer be "0" but it will be in fact +5 even when the dial says "0"..!!! So be very careful how much SVC you dial in.. Even when the volume control is set to "0" you will still hear sound out of the speakers if SVC is set way too high !!!
Is it possible to have sound even with the radio volume control set all the way down.. Yes it can!!! Try adding +10 or +20 SVC on each mode.. and try to use the +/- control on the steering wheel and see how you do..!!!
Steve
Bethlehem, Pa.