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The distance to an XM satellite has no bearing on my problem. I know how compressed XM is. I can take an XM Roady and take the output and plug it straight into the AUX input of my GM NAV unit. It sounds just as good as the CD or AM or XM. The problem that I am having, as well as others...

I have a 2007 Suburban LTZ with the NAV unit and the Bose Premium system. My XM is terrible too. Tinny and low-level. Occasionally I also hear low-level static interference on the XM. Here is what I have surmised. The Denso unit is a lousy design. It appears that the XM tuner does not go...