Question about Garmin StreetPilot c550 GPS Receiver

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Feedback please help I have the garmin c550 is giving off a high pitch sounds very loud please help THANKS

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Re: feedback

I've not experienced that with any of mine gordonshere, but what have you tried to isolate the cause and do you have more information?
does the volume control have any impact?
is it a constant noise regardless of the function you're using?
have you tried to dim the back lighting?
is the turn by turn voice clear?
is it mounted close to another audio device?
does the music play with out significant distortion?
Are you using the bluetooth with a phone in close proximity?
Does it squeal while being charged?
Does it squeal while connected to a USB hub?

Posted on Jan 06, 2008

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Welcome to FixYa!

Here's how to reset Garmin Street Pilot C550:

1. Remove the front plate of the c550 by sliding your finger under the groove in the plate below the Garmin mark on the plate.

2. Push the now-exposed reset button. The reset button is located on the same side of the c550 as the power cable connector.

3. Plug the c550 into an external power source to restart the c550 after you have reset it. The factory default settings will be restored.

Thank you for using FixYa.

Have a great day.

Apr 26, 2011 | Garmin StreetPilot c550 GPS Receiver

1 Answer


Hi Don,


You probably just need to find the reciept where you bought the C550.  Sounds like Garmin is protecting its customers when they say $300.  This is most unfortunate thing to happen to you.  Is the Garmin $300 issue as I thought and related to you not having the registration code or Reciept?



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You must call the factory to verify you have the unit - -and they will reset it remotely - this is to keep a thief from using it.

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As far as the car charger, I located one on eBay from a trusted seller for about $8 (includes shipping charge). Click here:

To update your c55o, click on one of these links:
StreetPilot® c550 Part Number: 010-00522-00

  1. Update Unit Software with WebUpdater
    • Use WebUpdater to automatically keep your operating software current.
    Unit Software
    • StreetPilot c550 Ver. 6.70 as of Dec 07, 2008 | Download
If you found this information helpful, please give me a big thumbs-up when you rate my answer. Thanks!

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There are replacement batteries available. Don't post in all caps please it is frowned upon.

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Feedback problem

Is there a spot you can install the Garmin that will reduce the heat build up within it? I've noted some audio issues (however not a loud high pitched sound) when my Garmin gets too warm from direct sunlight baking it (along with it's own internal heat build-up) I get a crackly, nasty sounding voice that goes away if I cool the unit down. I've since put mine on a stalk between the front seats out of direct sunlight, heater outlets and away from other audio output devices (heat and RF sources) and have eliminated any audio break down. Before I isolated the unit, allowing it to stay as cool as it could, I also noted that when one of my units gets very warm it would also drop satellite connection. Because of the delay you're experiencing (15 minutes) it sounds like a heat build up issue for you as well.

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Refer Page 6 of Garmin C550 Owner's Manual. If you forget your PIN number, drive to your security location where you set the PIN and this will unlock the unit. Richard New Zealand

Jun 16, 2007 | Garmin StreetPilot c550 GPS Receiver

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