I recently purchased a 2005 4.4 with NAV, DSP, and dealer installed Sirius. I bought and received an Alpine CHA-S634 and Blitz-safe adaptor off e-bay. However, the dealer used the three and six pin adaptors for my satellite radio. When I install the changer in its place, the changer works fine, but obviously I'd hate to lose the satelite. Anybody have any experience with such a snafu?