05 Caddy STS Antenna needed
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Cadillac STS Forum - 2005 through 2012 Discussion, 05 Caddy STS Antenna needed in Past Cadillac Vehicle Discussion; Ok, I'm a newbie here however a long time user of these forums and know the hoops. That being said ...
  1. #1
    checkmate26 is offline Cadillac Owners Member
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    05 Caddy STS Antenna needed

    Ok, I'm a newbie here however a long time user of these forums and know the hoops. That being said I bought a 05 STS in Oct and the GM Navigation (henceforth GPS) works ar 50% being that the Navigation and the Bluetooth are all jacked up. I took out the GPS out and noticed that the antenna wire that is dashmount is not there. Well I found one online and when it got here the plugs are the same.????? WTF???
    So I call the guy and he states that I ended up buying a Gen2 (2008-2010) instead of the Gen 1 (2005-2007) style and they do not have the Gen1 instock. Hmmm. I put it back in there and today I went to the Cadillac Dealership to have it reprogrammed (trying to troubleshoot this problem) since I've read here that should solve the problem. He tells me that this unit is not recieving a signal since there is not a antenna and if I want one installed its the WHOLE dash that comes out at $117/hour. No thanks I say. Ok the reason I post up here is that I'm in need of a 2005/07 Navigation Antenna to make this all work. Now I do have the one antenna and I think I need a male/male Fakra adaptor to get this to work. Any help is wanted, and yes I've read and saved the post about taking the dash out. It's to cold in the garage for that this time of the year.

    Thanks

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  3. #2
    ddalder's Avatar
    ddalder is online now Cadillac Owners Connoisseur
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    Re: 05 Caddy STS Antenna needed

    For factory placement, you must remove the dash carrier. This isn't to say that you can't place it elsewhere within range of the cable length. RF signals don't take well to passing through connectors. There is definite signal loss through each one. This is obviously necessary at times but you may find performance is degraded. I have the factory installed nav and antenna yet still find times where my GPS flag comes on and reception is marginal. I would definitely recommend acquiring the correct part.

  4. #3
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: 05 Caddy STS Antenna needed

    Both our 2006 & 2007 GPS lose signal regularly. It has little affect on the performance of the Nav system. A goal of never seeing a loss of signal indicator tends pointless.

  5. #4
    ddalder's Avatar
    ddalder is online now Cadillac Owners Connoisseur
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    Re: 05 Caddy STS Antenna needed

    Quote Originally Posted by EChas3 View Post
    Both our 2006 & 2007 GPS lose signal regularly. It has little affect on the performance of the Nav system. A goal of never seeing a loss of signal indicator tends pointless.
    Respectfully, I disagree. I have had several occasions where I've needed to drive several kilometers to regain a GPS signal and have my mapping return to normal. The system has been inspected, along with signal strength readings, all found to be normal.

  6. #5
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: 05 Caddy STS Antenna needed

    DD - How far North are you? I'm still a good 120 miles south of the 45th parallel. Maybe your reception is worse than ours. I know my GPS antenna wire has almost no slack in it at all. Refitting the Nav (and stuffing my Lockpick & uPAC-STS wiring back in) is a trick. (Hint: A piece of string helps a lot!)

    Anyway, I'll admit when I engage the Lockpick, the Nav gets 'lost' pretty quick and eill show me driving through a nearby field as if there was another road. But that's after the VSS has been blocked for a while. I'm pretty sure the 2008 & up Nav uses different software and maybe the algorithm that 'stciks' the Nav position to the road is different as well.

  7. #6
    ddalder's Avatar
    ddalder is online now Cadillac Owners Connoisseur
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    Re: 05 Caddy STS Antenna needed

    For satellite radio, coverage can vary due to the limited number and location of satellites but for GPS telemetry it's pretty consistent worldwide. I'm at about the 51st but I don't think this is a factor.

  8. #7
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: 05 Caddy STS Antenna needed

    I certainly agree with original response to the OP, recommending the correct part. I'm a bit surprised that you have an intermittant problem. I do recall other member posts but I wouldn't call it common.

    Good luck!

  9. #8
    Ludacrisvp's Avatar
    Ludacrisvp is offline Cadillac Owners Connoisseur
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    Re: 05 Caddy STS Antenna needed

    mine has no GPS signal for NAV about 50-60% of the time. its all OEM nav and not added after the fact.
    XM always works (I do realize different antenna and location). I don't understand why they decided to use a dedicated antenna under the dash rather than piggybacking on either the same antenna as XM/OnStar or have dual antennas where the roof antenna is.

  10. #9
    ddalder's Avatar
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    Re: 05 Caddy STS Antenna needed

    As you can see from the pic below, GM did kind of bury the antenna. Both the hood and the roof present obstacles to seeing the satellites. At least with XM, it's right on top of the roof. I can see why they don't try and share GPS and XM, but I don't understand why the position information isn't shared between the VCIM and navigation radio, especially since the OnStar GPS antenna is also on the roof. There should be a way for the VCIM to process the signal and broadcast the data to the nav system over the data bus.


  11. #10
    RandallLee is offline Cadillac Owners Member
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    Re: 05 Caddy STS Antenna needed

    ddalder. Are you are still monitoring this topic? I have a 2006 without navigation. After reading a few hundred blogs on the subject of installing factory navigation (here and elswhere), I went ahead and ordered one. The nav unit hasn't arrived yet, but I've already received the factory DVD disks, mic, and GPS antenna from your above photo. I am wanting to do as much of the process as factory install as possible, but would love to avoid pulling the entire freaking dash out. Isthere a way around this? The factory GPS antenna I received (wi/pink connector) only has about an 16" leash so my options are limited. Any further thoughts on reception?

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