For 2004 Coupe using FM Modulator and CD Changer
Thanks, Quikzilver, this was very helpful.
Now here are some comments that should cover the rest of the install types and also provide a couple of alternatives.
In my case, I have a 2004 Coupe (also silver, btw) with a CD Changer. I wanted to keep the CD Changer and the original head unit, so I chose to use the FM Modulator. I’m not as hung up on the sound quality as some are, so the FM Modulator is sufficient for my purposes.
Here are the major differences in the install:
1) You’ll have to remove the console to get at the back of the head unit. Excellent instructions with pictures for doing so can be found at
http://www.vetteessentials.com/instr...zel_howto.html. I suggest you use them, since things need to be done in a certain order.
2) The kit includes a relay for the FM Modulator that plugs into the antenna in the back of the head unit, which is why you have to get at the back. The bad news is that the fittings on the relay unit fit all vehicles except later model GM. The good news is that adapter cables are available. I got mine at Circuit City. You’ll need two, one to go from the relay to the head unit, the other for the factory antenna to plug into the relay. The relay can then be stuck to the back of the firewall with double-sided tape. Be careful to put it where it won’t interfere with the re-installation of the head unit.
3) The 2004 Corvette does not have the accessory wire for the power connection. A thread discussing the alternative of using the #22 fuse location can be found here:
http://forums.corvetteforum.com/c5-tech/789224-2004-valentine-1-hard-wire-to-power-need-a-little-help.html. I found the connector from Sporty’s catalog at AutoZone, rather than using the spade connector.
Here are some alternative approaches I used that others might find helpful:
1) Upon reading the instructions (which I admit not only goes against my grain, but also my family creed) I found that XM recommends strongly that the antenna be placed on a metal surface of at least 12” by 12”. I suppose the metal acts as part of the antenna. In any case, the instructions say that placement on anything but a metal surface will cause a significant degradation in signal. While apparently this hasn’t hurt Quickzilver’s reception, I decided the better option was to put it on the chassis rail located behind the right rear taillight. I ran the wire up through the drain hole and over the weather seal on the hatch to get it into the cabin. I don’t particularly like the fact that it shows and would be open to suggestions for a better way.
2) I placed the tuner unit under the passenger seat. I couldn’t find a place I liked on the passenger side kick panel as Quickzilver describes it. I ran the control unit wire and the FM relay wire from the console under the tranny tunnel carpet through to the back of the seat. The wires then pop out directly behind the seat and under it to the unit. I stuck the unit in place with double-sided tape, which seems to do a good job of keeping it from moving around. I have a power passenger seat and clearance is not a problem.
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Installation of XM Commander in C5 Instructions
