alternator whine in 03 suburban

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=115910
Printed Date: May 14, 2025 at 4:13 AM

Topic: alternator whine in 03 suburban

Posted By: bober174
Subject: alternator whine in 03 suburban
Date Posted: August 25, 2009 at 9:17 PM

Hi Guys,

I am working on an 03 Suburban with Bose. I installed a Kenwood 342U using the GMLAN2SR. I thought the radio was working fine, but it starts to whine when you drive it. When you start the vehicle and rev the engine, everything is fine. There aren't any problems until you drive it. At that time it starts to whine. The pitch changes with the RPM's. I ran a new ground wire. I would prefer not to run a new power wire, but I will if I have to. Is there any way to test this to see what is causing the problem? I could run power and ground from outside the vehicle, but it doesn't whine unless it is moving, so that wouldn't really help much. Any thoughts? Has anyone else had problems like this?

Thanks in advance!

Brian

Replies:

Posted By: i am an idiot
Date Posted: August 25, 2009 at 9:44 PM

While driving the vehicle, place the shifter to neutral and rev the engine. Is the noise related to the speed of the vehicle or the engine RPM? Is ther a VSS wire on that harness? If so, try moving the harness as far away from the radio as possible.

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Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB

Posted By: bober174
Date Posted: August 26, 2009 at 12:07 AM

The whine changes pitch when the vehicle shifts gears. After driving it, it whines when it is in park. It doesn't whine when it first starts up though. I'm working on it again in the morning. I'll check for a VSS wire.

Brian

Posted By: custombass
Date Posted: August 28, 2009 at 12:32 PM

Did you run your RCA's next to your power wire?

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