2004 Pontiac GP

[traystew]

I just bought a Pioneer AVIC-U310BT from Best Buy and had it installed. After picking it up any time I get up to highway speed, I get a high pitched noise out of my dash. They have had it back three times, changing out the GM module and this last time they reinstalled my old head unit in the trunk and ran the new unit through it somehow. Went to pick it up and the sound has still not going away. It starts out at a high pitched Morse code at around 65MPH and is constant high pitched whine at 75 and above. It is highly annoying and I need help. Thanks!

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[audioatg 10+ year member]

They did somthing wrong big time. There should be no reason why you should put your old headunit back in the trunk and run it to your new headunit. That makes no sense. Id take it back and ask for a full refund and go some place else.

 

[traystew]

Does it make any difference that it has a Monsoon system and Onstar?

 

[1rockford1 5,000+ posts]

get yo money back son

 

[audioatg 10+ year member]

Does it make any difference that it has a Monsoon system and Onstar?

No. there is a simple module that they put inline with the radio. So you can keep the onstar. And the beep for your oil change stuff.

Get your money back.

 

[audioatg 10+ year member]

Stop looking at this thread start making calls.

 

[x1le 10+ year member]

They did somthing wrong big time. There should be no reason why you should put your old headunit back in the trunk and run it to your new headunit. That makes no sense. Id take it back and ask for a full refund and go some place else.

some cars like civics and lincolns you have to leave the stock hu connected

 

[jwth2005 10+ year member]

Not with the 03 and up GMs. The factory GM vehicles have all the door dings, onstar, etc ran through the radio. To remedy this metra and a few others make a plug in module to cover all these features. Or if they dont matter to u a headunit could be installed without it.

 

[Johnny Law.Lulz 5,000+ posts]

It is a Pioneer, Ground the RCA's maybe.

 

[x1le 10+ year member]

Not with the 03 and up GMs. The factory GM vehicles have all the door dings, onstar, etc ran through the radio. To remedy this metra and a few others make a plug in module to cover all these features. Or if they dont matter to u a headunit could be installed without it.

i know. the gmos interfaces. i only quoted sine he seemed it was crazy to keep a factory hu in general.

i really wouldnt be wurprised if its like a speed limit indicator in the unit itself lol.

 

[jwth2005 10+ year member]

i know. the gmos interfaces. i only quoted sine he seemed it was crazy to keep a factory hu in general.
i really wouldnt be wurprised if its like a speed limit indicator in the unit itself lol.

i highly doubt it. GM doesnt do anything that fancy LOL. I dont think they have ever offer speed compensated volume control. I bet it is as simple as a bad ground.

 

[Johnny Law.Lulz 5,000+ posts]

My trailblazer has speed sensitive volume, its pretty nice for when i see a cop. I dont haveto slam the brakes and turn the volume down.

 

[traystew]

If it helps any, I get this noise whether the radio is on or not. It comes form the dash not the speakers. Right over my speedo and tach.

 

[audioatg 10+ year member]

some cars like civics and lincolns you have to leave the stock hu connected

Didnt know we were talking about those cars. OP said his GM vehicle.

 

[audioatg 10+ year member]

i highly doubt it. GM doesnt do anything that fancy LOL. I dont think they have ever offer speed compensated volume control. I bet it is as simple as a bad ground.

Yeah they have done this before. Not sure on the cars. Its been a fe years since my GM work days.