Name That Tune....2003 Sierra - Engine and Car Noises


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Name That Tune....2003 Sierra

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Auto Repair Home>> Automotive Repair>> Engine and Car Noises

MarineGrunt
Enthusiast
MarineGrunt profile image

Oct 16, 2013, 10:32 AM

Post #1 of 4 (1357 views)

Name That Tune....2003 Sierra	Sign In

I was driving home from work Sunday and my truck started making an odd sound. At first it almost sounded like an exhaust leak. Sometimes it's almost like it's a fast squeak. It only does it when I'm accelerating hard. If I slowly accelerate it doesn't do it. It doesn't do it when in neutral and accelerating. I even tried jacking up the rear end, and then accelerating but no dice. I was kinda thinking maybe the belt until it didn't do it while the rear tires were off the ground. I did notice a little bit of ps fluid underneath. The cap seems to be jacked up and won't seal. Not sure if that would cause it though. Steering is fine with no noises. Here's a link to the noise. Not sure how well you can hear it though.

https://www.youtube.com/watch?v=DaKp66MaTbY

Not sure how much you can help because I know noises are tough to diagnose online. Figured you might be able to give me some ideas though.

I'm on my phone now and it's a pain to type so will try and explain more when I get home.

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 16, 2013, 5:11 PM

Post #2 of 4 (1334 views)

Re: Name That Tune....2003 Sierra	Sign In

You sure you don't have a squirrel wrapped around the driveshaft?

Does it do it if you brake torque the engine?

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Oct 16, 2013, 5:12 PM)

MarineGrunt
Enthusiast
MarineGrunt profile image

Oct 18, 2013, 5:13 AM

Post #3 of 4 (1316 views)

Re: Name That Tune....2003 Sierra	Sign In

I'll give brake torqueing a try. Hopefully it will make the sound when doing that. It's hard to figure it out when it only happens while driving down the road. It almost sounds like the belt now but the belt is only about a year old and has about 10k on it.

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 18, 2013, 7:36 AM

Post #4 of 4 (1312 views)

Re: Name That Tune....2003 Sierra	Sign In

Don't forget about the belt that drives the ac compressor too.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

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