2001 Stereo Problems

[Delmo]

Just got a 2001 Tahoe, and I noticed some problems with the stereo. It has pretty bad reception and the Speed-Compensated Volume (SCV) feature also doesn't work. It just has the basic Delco single cd stereo, however there was a 10-disc sony added. Is reception a common problem with this model or is it likely to be affected by something else?
The car also has an remote starter. So I am not sure if adding one of those things might have screwed up the wiring.
Any suggestions on what to check ?
Any help would be greatly appreciated....
Thank You !

[Blazin56]

If your rca's for the cd changer are next to the antenna, this may cause some distortion due to the amount of power generated from the rca's

[Gauchoy2k]

What is in it now the delco or the sony. Do you have onstar? even if it's not in use. Is the bad reception on the radio or cd play?